Sanjin Elevator: Elevator motor control strategy

Sanjin Elevator: Elevator motor control strategy: 1.basic idea of ​​vector control 1971, by the German company Siemens F.Blaschke proposed vector control theory of AC elevator motor contro...

Elevator motor control strategy

1.basic idea of ​​vector control
1971, by the German company Siemens F.Blaschke proposed vector control theory of AC elevator motor control theory to obtain the first qualitative leap, the theory first induction elevator motor control system to be successful, then introduced synchronous elevator motor control system medium. In the inverter case, the analysis of permanent magnet synchronous elevator motor, which is usually synchronous rotation d, q coordinate system under the Park model. In this model, synchronous motor voltage, current and flux can be decomposed into mutually decoupled d, q-axis component. The permanent magnet synchronous elevator motor output torque control can be attributed to the cross-axis current and direct axis current control. With vector control AC drive system, its performance can be achieved even more than DC elevator motor speed control performance.
2.The basic idea of direct torque control
1985 Germany's Ruhr University Professor Depenbrock direct torque control theory, the basic idea is to maintain a constant amplitude of the stator flux under the premise of the stator flux by adjusting the rotational speed of the space, and then adjust the slip frequency to control the elevator motor torque and speed. The method is analyzed in the stator coordinate system mathematical model of the AC elevator motor, the elevator motor torque emphasis on direct control, eliminating the vector rotation transform complex transformations and calculations.

Sanjin Elevator: Introduction elevator motor

Sanjin Elevator: Introduction elevator motor: The traditional elevator drive is to use multi-gear transmission, the elevator motor is mainly used in induction elevator motor . The main ...

Introduction elevator motor

The traditional elevator drive is to use multi-gear transmission, the elevator motor is mainly used in induction elevator motor. The main problem with the gear transmission is the use of worm gears or other mechanical planetary reduction mechanism, not only caused the system structure complex, maintenance work difficult, noisy shortcomings, and the efficiency of the gear transmission is very low, such as worm gear worm gear efficiency is only 70 percent, large energy consumption of the whole system running costs. Meanwhile, this transmission mode due gearbox and traction machine larger, require large-mounted engine room, not only occupied the building thereby increasing the effective area of ​​the construction costs, but also affects the overall beauty of the building facade
     To solve these problems, from the 1990s onwards, the elevator industry related companies began to explore for new tractor. March 1996, Finland's Kone (KONE) has introduced a shocking industry 3000MoooSpace MRL, its core is EcoDisc disc magnet synchronous traction machine, thus creating a gearless elevator a new era.
     Water magnet synchronous gearless traction machine with flat, disc shape, with axial magnetic field, the radial magnetic field rotor, outer rotor radial magnetic field three structures, large radial dimension of the elevator motor, and more on the pole, is a low-speed , high torque permanent magnet synchronous elevator motor. This elevator motor is short axial dimension, light weight, small size, compact structure, the stator winding has a good cooling conditions, availability of high power density. Meanwhile, the elevator motor rotor inertia is small, mechanical and electrical time constant, peak torque and high stall torque, torque mass ratio, low running smoothly, with excellent dynamic performance.

Sanjin Elevator: Elevator motor development overview

Sanjin Elevator: Elevator motor development overview: Making use of a permanent magnet elevator motor, has a long history, is the world's first electric elevator motor permanent magnet elev...

Elevator motor development overview

Making use of a permanent magnet elevator motor, has a long history, is the world's first electric elevator motor permanent magnet elevator motor, but early permanent magnetic material is low, permanent magnet elevator motor is very heavy, so soon to be replaced by a elevator motor excitation current . By the 20th century, 30 years later, with high remanence density Alnico materials and has a high coercivity ferrite permanent magnet material has appeared, permanent magnet elevator motor began to develop. But these two permanent magnet materials have weaknesses, the performance is not satisfactory, mainly for micro machine area. The late 1960s, the rare earth permanent magnet materials and various other performance continues to improve, and promote the rapid development of the permanent magnet elevator motor. Has three generations of rare earth permanent magnet materials, rare earth permanent magnet materials performance has been greatly improved. Of particular note is that our country is a big country of rare earth reserves of the world, our research in this area has also made great progress
The basic structure of permanent magnet synchronous elevator motor and the type of
    Permanent magnet synchronous elevator motor is a synchronous elevator motor by a winding evolved, its structure and winding synchronous elevator motor is basically the same. By a three-phase winding and the stator core structure, and often Y-shaped armature windings connected; structure of the rotor, permanent magnet synchronous elevator motors with permanent magnets instead of electrical excitation, thus eliminating the excitation coil, slip rings and brushes. Compared with ordinary elevator motor, permanent magnet synchronous elevator motors must also be equipped with a permanent magnet rotor position detector for detecting the magnetic pole position, and thus on the armature current control to achieve the purpose for PMSM servo control.
    Compared with other elevator motors, AC permanent magnet synchronous elevator motor structure is relatively simple, it is characterized by: a relatively high power factor and efficiency; effective material utilization is high; their output power; small; reliable operation. Since permanent magnet synchronous motor in certain technical performance is superior brushless DC servo elevator motors and induction elevator motors, so in high-performance permanent magnet synchronous elevator motor servo drive system (especially small and medium-power control system of all kinds) has been widely applications, such as CNC machine tools, industrial robots, LSI manufacturing, office automation equipment, flexible manufacturing systems, petrochemical equipment, manned spacecraft, power tools and household appliances and other fields.

Sanjin Elevator: Comparison of elevator motors

Sanjin Elevator: Comparison of elevator motors: Below these are several elevator motor speed control system to make a comparison.     2.1.1 and AC drive systems, DC speed control system is...

Comparison of elevator motors

Below these are several elevator motor speed control system to make a comparison.
    2.1.1 and AC drive systems, DC speed control system is simple, speed performance, deflector structure is simple, the governor has long been the dominant transmission towel, but with the theory and technology of AC variable speed development, more and more places are AC elevator motors instead. This was mainly due to DC elevator motor speed control system of the following disadvantages:
1) DC elevator motor structure is complicated and costly, failure and more difficult to maintain and workload, often due to spark large impact on production.
2) segments of the commutator machine capacity limitations of the capacity of the elevator motor, voltage and speed, contact the current transfer and limit the DC elevator motor applications.
3) on the rotor armature, elevator motor efficiency is low, poor heat dissipation, cooling cost is high. To improve the ability to change, reduce armature leakage inductance, the rotor becomes chunky, moment of inertia increases affect the dynamic performance.
2.1.2 induction elevator motor drive system features:
General Elevator asynchronous elevator motors are used with cage rotor, simple structure, strong and durable. Elevator control for asynchronous elevator motor speed regulator from the beginning to use the scalar control voltage and variable frequency, recapitulation becomes flux-oriented vector control. Not only improve the accuracy of the elevator motor system control, operating efficiency has improved.
 But the induction elevator motor drive system has several disadvantages:
 1) from the side of the stator asynchronous elevator motor excitation, therefore, the elevator motor power factor is low, causing inverter device input power is low. And compared with the capacity of a synchronous elevator motor, the use of large capacity inverter device.
 2) In the high-performance vector control induction elevator motor speed control system, the rotor parameters will be affected by temperature changes, resulting control error, affecting its control precision.
3) asynchronous elevator motor to improve the power factor and efficiency, the need to minimize the air gap between the stator and rotor, which makes manufacturing difficult.
2.1.3 PMSM system features: [12] [13] [14] [15] [16]
Permanent magnet synchronous elevator motor can be divided into two categories, one is powered back EMF waveform and current waveform is an ideal square wave (actually trapezoidal wave) of the brushless DC elevator motor magnet synchronous motors another water two waveforms are sine , is usually said permanent magnet synchronous elevator motor. Among their frequency control system is to use a rotor position detection device constitutes a closed-loop control, the decision by the position of the rotor frequency corresponding power tube off, making the inverter output frequency and elevator motor speed are always in sync, so-called self-control governor system. Whenever the elevator motor rotor turned one pair of poles, the output current of the inverter just change a cycle, current and rotor always in sync, does not appear out of step. Frequency by adjusting the input voltage to the motor for speed control characteristics due to the former is similar to the DC elevator motor, and replaced with electronic commutation of the latter mechanical commutation, the abolition of the brush, so named brushless DC motor In general, for an elevator and a permanent magnet synchronous brushless DC elevator motor controller are installed in the rotor position detecting means, but there are brushless DC elevator motors with the counter-electromotive force detection position, called the application without position sensing techniques.
Brushless DC elevator motor high efficiency, high power factor, overload, small size, easy to maintain. With the emergence of new magnetic materials, making the synchronous motor with high dynamic and static quality. The system control method is very simple. Disadvantages are: manufacturing process is slightly more complex than the induction elevator motor, the most fatal disadvantage is the low speed pulsation obvious. This will result in slow elevator comfort worse.
    2.1.4 The permanent magnet synchronous elevator motor is characterized by:
    I) torque ripple, steady speed, dynamic response quickly and accurately, strong overload. Than asynchronous elevator motors for synchronous motor torque disturbance has stronger capacity, can make a relatively fast response. When the induction elevator motor load torque changes, the required elevator motor slip also followed changes, namely the elevator motor speed change accordingly, but the system inertia of the rotating part of the elevator motor impede rapid response. Synchronous elevator motor load torque changes, as long as the elevator motor power angle to make the appropriate changes in the rotational speed was maintained constant in the original synchronous speed, the inertia of the rotating part does not affect the rapid response to the torque elevator motor. The maximum torque of permanent magnet synchronous elevator motor can reach more than 3 times the rated torque of the elevator motor system in large changes in load torque conditions are very favorable and stable operation
2) high power factor, high efficiency. Water-magnet synchronous elevator motor and the induction elevator motor compared to the excitation current not reactive, can significantly improve power factor, to reduce the stator current and stator copper loss, but also in the stable operation without rotor copper losses, in turn, can decrease total loss due to reduced fan capacity or even remove the fan, thus reducing or even eliminating the corresponding wind friction loss. Thus, it is more efficient than the same specifications asynchronous elevator motor can be increased by 2 - 8 points. Compared with the electrically excited synchronous motors, permanent magnet synchronous elevator motor excitation power eliminates the need for improved efficiency. Moreover, the water magnetic synchronous elevator motor at 25% to 120% of rated load range
Circumference can be maintained in both the high power factor and efficiency, energy saving light load operation is more significant in the long-term use
Can greatly save energy.
    3) Small size and light weight. In recent years, with the continuous application of high-performance permanent magnetic materials, permanent magnet synchronous elevator motor power density is greatly improved, compared with the capacity of asynchronous electric elevator motor, has a larger volume and weight reduction, making it in many special occasions applied.
    4) structural diversification, and wide application of water to touch the rotor synchronous motor structure is extremely diverse, resulting in features and performance of many different species, from one industry to the agricultural workers from civilian to defense, from daily life to aviation aerospace, power tools from simple to high-tech products, almost all-encompassing.
    5) high reliability. With DC elevator motor and electrically excited synchronous elevator motor, has no brushes, simplifying the structure, increasing reliability.
    Sine wave magnetic synchronous elevator motor water gap magnetic flux density due to their spatial distribution load nearly sinusoidal shape, reducing the harmonic components of the air gap magnetic field, thus reducing the magnetic field caused by the harmonics of the various harmonics of the torques and the loss and electromagnetic vibration torque caused by harmonics, improve the efficiency of the elevator motor, and the elevator motor runs more smoothly when rotated, the noise has also been reduced. Meanwhile, the sine wave PMSM vector control in accordance with a variety of methods to constitute frequency control system, high-performance, high-precision drive, the dynamic response requirements of the occasion of its application particularly promising.

Sanjin Elevator: Comparison of elevator motors

Sanjin Elevator: Comparison of elevator motors: Below these are several elevator motor speed control system to make a comparison.     2.1.1 and AC drive systems, DC speed control system ...

Sanjin Elevator: Elevator motors profile

Sanjin Elevator: Elevator motors profile: Elevator overview of the development Elevator motor due to the use of special occasions, elevator motor should have a little vibration, lo...

Elevator motors profile

Elevator overview of the development
Elevator motor due to the use of special occasions, elevator motor should have a little vibration, low noise, small starting current, starting torque and enough smooth running performance requirements. Permanent magnet synchronous elevator motor has torque ripple, steady speed, dynamic response quickly and accurately, strong overload capacity, etc., not only to meet the above requirements, but also can significantly improve the power factor, reduce losses and improve efficiency the long run, you can play down the synergistic effect. Meanwhile, the sine wave PMSM vector control in accordance with a variety of methods to constitute frequency control system, high-performance, high-precision drive, the dynamic response requirements of the occasion of its application particularly promising.
     Elevator motor and control technology
Lift the development history, in fact, the elevator motor and control technology development history.
     Elevator motors, according to the type of motor points, can be divided into the DC elevator motor and AC elevator motor two categories. According to the elevator motor driven gear traction machine without a gear-driven and can be divided into gearless drive in two, according to the different control methods can be divided into two-speed elevator motor, the voltage controllable elevator motors and variable speed elevator motors.

Sanjin Elevator: Elevator motor characteristics

Sanjin Elevator: Elevator motor characteristics: Elevator Performance With computer control technology and development of inverter technology has greatly improved, but there is asynchronou...

Elevator motor characteristics

Elevator Performance With computer control technology and development of inverter technology has greatly improved, but there is asynchronous frequency inverter elevator motor torque at low speed low enough to run smoothly thereby affecting the low-speed range undesirable drawbacks.
Replacement of permanent magnet synchronous AC induction elevator motor speed control elevator motor, asynchronous with synchronization frequency inverter can solve the low-speed alternative to paragraph shortcomings and start-up and operation of the jitter problems, make the elevator run more smoothly, more comfortable, while reducing the size of the elevator motor, reducing noise.
Using a gear elevator traction machine, when the elevator brake failure, the car generates free fall, you can take advantage of permanent magnet synchronous elevator motor current braking function ensures that the car slow slip car for elevator safety adds a security barrier.
Permanent magnet synchronous elevator motors and asynchronous elevator motors and features of the main differences
Due to the asynchronous elevator motor is to rely on the elevator motor rotor stator current excitation, and permanent magnet rotor with permanent magnets generate magnetic fields do not need direct electrical excitation. Therefore, permanent magnet synchronous elevator motor has a simple structure, reliable operation, small size, light weight, high efficiency, flexible shape and size and other characteristics.
AC permanent magnet synchronous elevator motor speed elevators main advantages
1, simple structure, reliable operation, because no excitation permanent magnet rotor, eliminating the coil or the cage, simplifying the structure to achieve a brushless, reducing the failure, easy maintenance, easy maintenance complexity factor greatly reduced.
2, temperature rise, a small volume of permanent magnet synchronous elevator motor and induction elevator motors, because no reactive excitation current, and includes:
(1), high power factor, close to 1.
(2), sinusoidal EMF reduces the amplitude of higher harmonics, effective solution to the interference of the power supply.
(3), reducing the elevator motor copper loss and iron loss.
Synchronous elevator motor heating temperature rise is small (about 38K), elevator motor shape, small size compared with asynchronous elevator motors, reducing one to two frame sizes.
3, ultra-high efficiency energy saving, because the high power factor (can be approximated as 1), but also eliminates the need for electrical excitation, reducing the stator current and stator rotor resistance loss, high efficiency (94 to 96%), full load starting current reduction than asynchronous half, so the energy saving effect is obvious, for the elevator, synchronous elevator motors can be saving more than 40% (after the user actually uses the test results), light load current is small, only about 10% of induction elevator motors, such as light load 11KW asynchronous induction elevator motor elevator motor current 10A, while the synchronous elevator motor light load current is only 0.7A.
4, wide speed range up to 1:1000 even higher (asynchronous elevator motors only 1:100 Note: Asynchronous elevator motor with speed sensor feedback is also up to 1:1000), high speed accuracy can be greatly enhanced the quality of the elevator.
5, the permanent magnet synchronous elevator motor at the rated speed elevator to maintain constant torque, for improving the operation of the lift stability is essential. Given curve can be done coincident with the operation curve, especially in the low frequency elevator motor, low pressure, low speed to provide sufficient torque to avoid jitter during the elevator starting retarder, the elevator start to improve comfort during braking.
6, the permanent magnet synchronous elevator motor starts running at full load current does not exceed 1.5 times the rated current, configure the drive without increasing power configuration, reducing the cost of the drive.
7, permanent magnet elevator motor constant torque and wide speed advantage, the elevator motor can be made into a multi-polar, for the removal of gear teeth of the car-free (ie, gearless traction machine) to create the conditions that promote the elevator technology.
8, the permanent magnet synchronous elevator motor EMF elevator can be designed into a sine wave, low loss, low vibration, low noise, environmental protection requirements.
9, the use of permanent magnet synchronous elevator motor dynamic braking functions, implementation of a tooth elevator secondary security.
10, the use of permanent magnet synchronous elevator motor of the elevator can save energy 40%, each annual electricity savings of nearly million dollars.
11, permanent magnet synchronous elevator elevator motors and drive system for driving the synchronous elevator motor drive components. Current synchronization frequency inverter with the same power compared to the price of the asynchronous equivalent, but the use of permanent magnet synchronous elevator motor drive power level lower than asynchronous machine, you can reduce costs.

Sanjin Elevator: Elevator motor Introduction

Sanjin Elevator: Elevator motor Introduction:    Permanent magnet synchronous elevator motor is a permanent magnet material generates excitation magnetic field, instead of electrical ex...

Elevator motor Introduction

   Permanent magnet synchronous elevator motor is a permanent magnet material generates excitation magnetic field, instead of electrical excitation. It does not require excitation current, the rotor-circuit loss. Permanent magnet synchronous elevator motor excitation magnetic field generated by the permanent magnets and the stator winding of the current generated by the electromagnetic coupling of the elevator motor rotation. Permanent magnetic materials and physical properties of permanent magnet synchronous elevator motor performance are closely related. Permanent magnetic materials research and production has developed rapidly.
Permanent magnet synchronous elevator motor with inner rotor and outer rotor type two, contained within the rotor for major, high-speed applications; outer rotor type, small size, suitable for elevators without machine room.
   Permanent magnet synchronous gearless traction machine with the traditional worm gear, worm gear traction machine compared with the following advantages:
a) permanent magnet synchronous gearless traction machine is a direct drive, no worm, worm drive, permanent magnet synchronous elevator motor is not required for the induction elevator motor stator coil very occupy the place, and the production of permanent magnet synchronous elevator motor main material is high-energy The high remanent flux density and high coercivity NdFeB, its flux density generally reach 0.75T or more, so you can achieve small size and light weight.
b) high transmission efficiency. As a result of permanent magnet synchronous elevator motor direct drive (no worm gear deputy) the transmission efficiency can be increased by 20% to 30%.
c) permanent magnet synchronous gearless traction machine because there is an induction elevator motor running at high speed bearing noise and what happens there is no contact with the worm gear transmission that occurs when noise, so noise can be reduced whole 5 ~ 10db (A) .
d) low energy consumption. Works from the permanent magnet synchronous elevator motor shows its permanent magnet excitation is achieved, without the stator to provide an additional excitation current, and thus the power factor can reach very high (theoretically can reach 1). Permanent magnet synchronous elevator motor rotor while no current through the rotor depletion problem does not exist. Generally lower than asynchronous elevator motors consume 45% to 60%. Since there is no low efficiency, high energy consumption worm gear pair, power consumption is further reduced.
e) permanent magnet synchronous gearless traction machine because there is no tooth profile wear problems and does not require periodic replacement of oil, so its long life, and basically no maintenance.
Security is a new generation of energy-saving and permanent magnet synchronous traction elevator is a major feature, is unmatched by a traditional lift big technological progress. Permanent magnet materials synthesis and sintering of the world leading level, the level of production of permanent magnet elevator motor soon catch up with the world level, in order to lift production to provide favorable conditions.

Sanjin Elevator: Elevator motor - Elevator Parts

Sanjin Elevator: Elevator motor - Elevator Parts: AC variable speed system applications in the elevator Currently DC door and other door many problems, mainly reflected in the installation...

Elevator motor - Elevator Parts

AC variable speed system applications in the elevator
Currently DC door and other door many problems, mainly reflected in the installation and commissioning difficulties, low efficiency, poor stability door operation quality aspects. Particularly in the face of a variety of knife gate, the gate width and the gate change in weight is large, there are often noisy door switch, and so on does not run smoothly, very difficult to reach a desired operating curve, the elevator can not achieve satisfactory The operational requirements. To make the door easy installation, nuclear Oda introduced various changes to adapt to the door controller intelligent products. Following is a brief description of its electrical system features:
The system elevator motor rotor magnetic pole position of the permanent magnet is mounted on the elevator motor shaft by magnetic rotary encoder obtained. Permanent magnet synchronous elevator motor using closed-loop vector control, the elevator motor magnetic pole position of the permanent magnet rotor mounted on the elevator motor shaft by the magnetic encoder obtained. Magnetic encoder with Hall element and a signal processing technology, not only improves reliability, but also to achieve program control, with a small (only Ф20mm × 5mm), good stability, high precision control and high resolution characteristics.
Door control system using TI's elevator motor control DSP2407 chip, because the chip integrates all the required elevator motor control peripheral interface circuit including PWM modulation circuits, analog / digital conversion circuit, the encoder interface and communication circuitry, system integration and reliability is greatly improved. Its inverter using vector control, designed to join the induction elevator motor, both the synchronous elevator motor speed, but also supports asynchronous elevator motor speed. Serial communication converter is a door to OTIS Elevator transformation products, it is applied in the control cabinet control 300VF and 300VFE elevator door machine. String type converter is also a communication front and back doors with door converter serial communication an ancillary products, it and the serial communication door converter together to complete the through-door control. Free debugging features intelligent management and remote monitoring capabilities for supporting the elevator door and transformation provides a wealth of resources.
To sum up, the elevator door control system using permanent magnet synchronous elevator motor system has obvious advantages in improving system performance while effectively reducing system footprint for Keti, bed ladder, housing ladder, ladder and other tourism kind of ladder. Currently, nuclear Oda door already has integrated features [MS1], in the elevator applications can match mutual adjustment, according to user need to build a variety of solutions.

Sanjin Elevator: elevator motor door control system and its applica...

Sanjin Elevator: elevator motor door control system and its applica...: Permanent magnet synchronous frequency conversion technology in elevator motor has been very common, but in the free testing and remote mon...

elevator motor door control system and its application in the elevator motor

Permanent magnet synchronous frequency conversion technology in elevator motor has been very common, but in the free testing and remote monitoring door application and rare. Tianjin New Technology Development Co., Ltd. Nuclear Oda independently developed AC permanent magnet synchronous inverter door control system that uses a vector control technology and computer communication technology, direct drive, simple installation, low-speed torque, wide adjustment range, with energy consumption, smooth operation, low failure rate, free debugging features, and remote monitoring capabilities, high cost, is an energy-saving green products, is currently the energy re-use of new trends in the elevator motor best matching products. The product has passed the aging test and type testing, is the market.
Nuclear Oda permanent magnet synchronous machine and the door compared to asynchronous conversion door, energy efficiency from 60% to 90%, power factor close to 1, you can save about 35%. Its free debugging capabilities so that the door does not require adjustment after learning machine parameters, there is an ideal operating state; its remote monitoring function is to read through the internet network door controller parameters, modify the parameters, door control commands sent and monitoring the door running, its inverter, motor, encoder can meet various kinds of electrical interface ladder.
A free commissioning, remote monitoring frequency control of permanent magnet synchronous machine in the elevator motor door Application
Early 2007, the nuclear Oda on Moli Industrial Park office building in a TOEC40 elevator motor door machine transformation. The elevator motor was installed is a DC-door, because of its poor stability of late, running noise, often malfunction. Replacing nuclear Oda permanent magnet synchronous conversion door, using jiaoding installation form, other mechanical structure unchanged. Product installation, the inverter is set to self-learning files, live only once self-learning (after power is given instructions and closing command to open the door), the computer will be the memory of the switch gate data, according to the weight of the door leaf and door width automatically generated operating curve, the entire commissioning process less than a minute, the results that achieve the desired state. Greatly reducing installation time, to bring great convenience commissioning, reflecting a high degree of intelligence superiority.
PC interface
Inverter with RS232 interface with a computer connected to the host computer can be realized on the elevator motor door machine monitoring and control. PC using the RS232 and permanent magnet synchronous VVVF elevator motor door controller communicate with a remote monitoring computer through the internet for data exchange. Remote monitoring computer via internet access to the door motor speed, current and position of the elevator motor door, door controllers and other parameters, and can be modified through the internet door controller parameters to stored in the door controller, the door can be completed simultaneously switch. Use of remote monitoring systems are often monitored door machine, door machine operation status monitoring and recording.

Remote monitoring interface
This feature greatly reduces the on-site service, reducing the waiting time for troubleshooting, but also improve the efficiency of services, dramatically reducing service costs.

Sanjin Elevator: Elevator motors Category

Sanjin Elevator: Elevator motors Category: Elevator motors and industrial motors, as there are different categories, from different angles can be divided into multiple. On the type o...

Elevator motors Category

Elevator motors and industrial motors, as there are different categories, from different angles can be divided into multiple. On the type of elevator motors, for example as follows:
A) Press the power points:
Lift motors with AC and DC elevator motors into two categories,
Elevator traction machine or as a driver driving a load
Motors, are motor type, its power supply is also divided into AC and DC categories.
AC lift motor is essentially asynchronous (induction) motors, so called rotor speed is also lower than the same
Stator rotating field synchronous speed speed.
AC lift motor stator is basically a three-phase power supply,
But the voltage is divided into many; such as 220V, 380V, 420V, 440V, etc., most of 380V. AC power frequency is the frequency, but often 50Hz and 60Hz categories.
Two) divided by braking with brake and without brake categories.
AC motors are generally two types of elevator motor, motors without brake and often by a multi-pole windings to make the brake windings, while the DC lift motor braking is achieved by circuit control, AC lift motor with brake, brake Winding often supplied with direct current.
Three) divided by ventilation with fan and without fan categories.
Current common elevator motors, whether AC or DC's, basically with a dedicated fan, to achieve forced air, and heat-sensitive switch to control.
Old-fashioned elevator motors - generally without fans, and even that is an ordinary three-phase asynchronous electric four) by the structure have seat belt machine and without the base of the two categories: general DC lift motor with the base, and the base required magnetic properties, so the steel material, can be cast, you can also use welded steel plate bending, for AC lift motor, the imitation of America otis elevator motors, and imitation Mitsubishi elevator motors, the stator base circular structure is the use of the stator pieces, there are chassis (seat), fan cooled. Average volume than people, and imitation Swiss Schindler on AC
Ladder motor uses a unique structure. Stator Stator using octagonal piece of AC lift motor rotor structure in accordance to points: cast aluminum structure and the structure of two copper bars. Shorted turn in the middle of another, especially in the ring and have asked two short rings.
After using the middle of the elevator motor short-circuit loop start running a brake three run some have achieved good performance. Intermediate traction motor short-circuit ring was originally a novel structure, which after the introduction of the elevator motor, and achieved satisfactory results.
Press the bearing structure points: Rolling bearing structures and types of sliding bearing type, generally DC elevator motors Bing rolling bearings. The AC motor with a sliding bearing elevator after the small bearing noise greatly thief, thereby reducing motor noise.
According to the motor winding structure points; has a single winding, dual winding and multi-winding several categories.
Elevator operation is an advanced form of motor speed, in order to meet the performance requirements turtle ladder run. There is often dual, multi-winding structure, but from an efficiency perspective, there are also disadvantages. A single winding, the dipolar modulation scheme, the efficiency can be improved, energy-saving effect is better, but to pay attention to the sinusoidal magnetic field. Minimize harmonics.
Press the versatility points: a and Y series asynchronous electric hunger is basically common structure of the elevator motor. And Y series induction motor and the basic structure of the elevator feet is not common motor types.

Sanjin Elevator: Elevator debugging process(f)

Sanjin Elevator: Elevator debugging process(f): 1.5 Debugging comfort Note: Lift the drive parameters to adjust comfort, you should first check the mechanical parts. 1.5.1 The mechanica...

Elevator debugging process(f)

1.5 Debugging comfort
Note: Lift the drive parameters to adjust comfort, you should first check the mechanical parts.
1.5.1 The mechanical part of the elevator comfort in effect divided into the following specific conditions:
1) Check the elevator traction machine worm, worm.
2) the vertical elevator guide rail elevator test tool elevator operation will not only affect the level of vibration, but also affect the operation of the elevator vertical vibration.
3) quality of the elevator car guide shoes and force, and therefore in order to obtain better PMT test curve, you should make the car and the car balancing static equilibrium. The car guide shoes minimal force in order to achieve the best elevator.
4) is not perpendicular to the counterweight guide shoes, guide shoe discontinuity an elevator will also affect comfort.
5) Lift up the elevator brake, brake great influence, debugging should seriously good tune.
6) Lift the wire rope and sheave groove contact also affect lift jitter. So light through the sheave to carefully check.
7) elevator wire rope tension is uneven vibration source, pay attention to check.
8) car top, bottom thereof, mechanical failure of the bottom cushion can also cause vibration damping.
1.5.2 Depending on the system, use the appropriate method for different drive parameters for debugging.

Sanjin Elevator: Elevator debugging process(e)

Sanjin Elevator: Elevator debugging process(e): 1.2 Check before commissioning slow External inspection is completed, removing the brake control line, close the power to observe the elev...

Elevator debugging process(e)

1.2 Check before commissioning slow
External inspection is completed, removing the brake control line, close the power to observe the elevator in the non-operating state brake control terminals no output even if the brake control cable connected, the brake will not turn on, and then connect the power brake control line. Ready to run slow.
1.2.1 checks after power
1) Check the controller board into the power system voltage between the terminals, requiring DC24V0.5V inside.
2) Check the system inside and outside the church the power supply voltage to DC24V0.5V inside.
1.3 overhaul test run
1) Input signal inspection: careful observation of the elevator during operation of the switching signal received is normal operation sequence.
2) output signal inspection: the motherboard carefully observed each output point is correct, and is working properly, the control signal, the contactor is normal.
3) Check the running direction: the elevator placed in non-end station, electric slow run, observe the direction of running direction is consistent with the purpose, if any exchange of different motor-side power in two phases.
4) If the elevator test tool speed abnormal operation occurs jitter, through the operation panel observed current is too large, the motor is running abnormal sound, check the encoder wiring, switches A, B phase.
1.4 Express check before running
Express check before tuning down forced deceleration switch, limit switch, limit switch is functioning normally, leveling flapper installed correctly, leveling sensor action sequence is normal. Encoder wiring is correct, the number of pulses per revolution encoder settings are correct.
1.4.1 Express check before
1) Express debugging and slow when debugging a certain time interval, before climbing again perform debugging checks.
2) inside and outside the church the power supply voltage to DC24V0.5V inside.
3) Confirm the safe and reliable switching action.
4) Confirm safe touch panel circuit wiring is correct.
5) intercom wiring is correct, call normal.
6) station clock wired correctly.
7) car lighting, fan wiring is correct.

Sanjin Elevator: Elevator debugging process(d)

Sanjin Elevator: Elevator debugging process(d): 1.1.4 Ground Inspection 1) Check the following terminals and ground terminal PE infinite resistance between whether, if small please check...

Elevator debugging process(d)

1.1.4 Ground Inspection
1) Check the following terminals and ground terminal PE infinite resistance between whether, if small please check the reason.
a) Power side R, S, T and the PE resistance.
b) Supply-side U, V, W and PE resistance.
c) Motherboard resistance between 24V and PE.
d) the voltage of the encoder, A, B, PGM and the PE resistance.
e) the motor side of the U, V, W and PE resistance.
f) positive and negative bus terminal and the PE resistance.
g) security, door locks, repair loop resistance between terminals and PE.
2) Check the elevator test tool so the electrical components of the ground terminal and the control cabinet PE ground terminal of the power line between the resistance should be as small as possible, if too large check immediately.

Sanjin Elevator: Elevator debugging process(c)

Sanjin Elevator: Elevator debugging process(c): 1.1.3 Power checks. A) the system power supply before checking user. An interphase voltage 380V15% or less, not parallel to each phase of no...

Elevator debugging process(c)

1.1.3 Power checks.

A) the system power supply before checking user. An interphase voltage 380V15% or less, not parallel to each phase of not more than 3%.

2) control board controller elevator test tool into the power 24V ~ COM into the electric voltage between 24V.

3) Check the total switching capacity of the line and should meet the requirements.

Note: The system voltage exceeds the allowable value into the cause devastating consequences, we should focus on inspection, should pay attention to the positive and negative DC voltage. Into the power system at the phase when you do not move vehicles to avoid accidents.

Sanjin Elevator: Elevator debugging process(b)

Sanjin Elevator: Elevator debugging process(b): 1.1.2 encoder checks. Pulse encoder feedback control system is important to ensure accurate, especially for synchronous motor of the eleva...

Elevator debugging process(b)

1.1.2 encoder checks.
Pulse encoder feedback control system is important to ensure accurate, especially for synchronous motor of the elevator test tool, which is likely to slow bad installation when debugging Speed ​​phenomenon. So check before commissioning to focus.
1) Check the encoder is securely installed, wiring and reliable.
2) Check the encoder signal wires and power circuits are partakers groove arrangement, to prevent interference.
3) encoder connection preferably directly from the encoder connected to the control cabinet, if the connection is not long enough, need to be extended, then the extension should also use shielded cable, with the encoder connection with the soldering iron.
4) encoder shield grounded at the controller end and reliable.

Sanjin Elevator: Elevator debugging process(a)

Sanjin Elevator: Elevator debugging process(a): Elevator commissioning specific content 1. Elevator commissioning phase, make sure the hoistway, the car unattended circumstances! Otherwi...

Elevator debugging process(a)

Elevator commissioning specific content
1. Elevator commissioning phase, make sure the hoistway, the car unattended circumstances! Otherwise, a major accident could happen!
To facilitate debugging debugging members are listed below in the order when debugging elevator, in the peripheral circuit, mechanical installation fully in place in the case before debugging.
1.1 idle before commissioning checks.
Elevator entered the commissioning phase, the correct debug the elevator tool normal safe operation of protection. When debugging should be at least two simultaneously. If abnormal situation should be immediately cut off the power.
1.1.1 Field mechanical, electrical wiring checks.
Before powering on the system you want to check the external wiring to ensure personal safety and the components.
1) Check the part number matches.
2) safety circuit conduction.
3) Lock Loop conduction and are reliable.
4) wells flow, no car, and have suitable conditions for operation of the elevator.
5) grounded.
6) according to the manufacturer drawings correct external wiring.
7) Each switch is working properly, reliable action.
8) Check the resistance of the main circuit and white, check whether there is a short circuit to ground.
9) confirm the elevator is in maintenance state.
10) mechanical parts in place, will not cause equipment damage or personal safety.

Sanjin Elevator: Escalator operation management system

Sanjin Elevator: Escalator operation management system: First, the implementation of the management and personnel In order to do escalators and moving walkways in the management, with escalators...

Escalator operation management system

First, the implementation of the management and personnel
In order to do escalators and moving walkways in the management, with escalators and moving walkways units should implement good management departments and personnel, elevator tool for the device to establish a good file and take good care of the file, and the conditional If you wish to use a larger number of units self-maintenance, the maintenance personnel must be trained in assessment, and obtain land (city) level of quality and technology supervision department issued qualification certificates. Escalators and moving walkways before being used, should be set up near the entrance to Use signage. These signs should be possible to use pictograms that its minimum size of 80mm × 80mm. Which should include at least: a, children must stay taut; b, the dog must be holding; c, standing facing the direction of the foot to leave the edges of steps; d, hold the handrail. Maintenance work should make a record, no maintenance unit using qualified personnel should be entrusted to a qualified repair and maintenance units for routine maintenance work. Escalators and moving walkways used by management to develop personal responsibility as the core, including technical file management, safe operation, routine inspection, maintenance, periodic inspection and emergency measures, including the safe use of equipment and operations management system and strictly enforced.
Second, the establishment of escalators and moving walkways file
One would randomly to all the technical documents and drawings are numbered and filed for safekeeping at the same time should be easy to access. In these materials, escalators and moving walkways maintenance manual, electrical control schematics and electrical wiring diagram should be placed prominently so that routine maintenance at any time.
 (2) an annual special equipment inspection agency escalators and moving walkways inspection report, each maintenance records and accident records shall also create the file accordingly.
Third, the establishment of normal management system
1 new escalators and moving walkways must hold the unit using special equipment inspection agency issued the acceptance inspection reports and safety inspection mark to land area, above the level of special equipment safety supervision organization registration, the security inspection sign fixed on special equipment prominently, the party can be put into official use.
 2 escalators and moving walkways Maintenance personnel should hold special equipment operator credentials to posts.
 3 escalator and automatic sidewalk maintenance unit should have the appropriate qualifications.
 4 escalators and moving walkways startup key must be kept.
 5 escalators and moving walkways normal operation should be a personal inspection.
 6 each inspection, maintenance, repairs should be performed after recording.
 7 escalators and moving walkways should start and shut down management system.
 8 Use the unit should be established to take emergency measures in an accident the details.
 9 formulating escalators and moving walkways inspection maintenance system.
 10 units must be on schedule with escalators and moving walkways to the location of special equipment inspection agency for regular inspection and timely replacement of safety inspection marks the relevant content. Escalators and moving walkways for one year periodic inspection cycle, safety inspection marks over the validity of escalators and moving walkways shall not be used.

Sanjin Elevator: the Simulation debugger of escalator

Sanjin Elevator: the Simulation debugger of escalator: Abstract :The design of the escalator is a simulation run the debugger escalator control system for a variety of device simulation debuggin...

the Simulation debugger of escalator

Abstract :The design of the escalator is a simulation run the debugger escalator control system for a variety of device simulation debugging, the debugger running on the PC, shows various states of the elevator operation, parameters, and the other nodes through the serial port Communication, testing parameters, fault detector features. The issue with the VB programming, design the elevator tool simulation run the debugger can automatically identify the node plug. Escalators can run animation to simulate a variety of running, the receiver set the device to set parameters, can set the device to run the state feedback, can display fault detector detects the fault code.
 The core of the debugger is the escalator debug remote monitoring and parameters, the debugger designed by RS-485 bus and device parameters and fault diagnosis device to communicate, to reach the purpose of remote operation, that is effectively completed automatically Escalator running real-time monitoring, and maintenance personnel to facilitate the maintenance of the escalators, is the staging system, its application to the design value.

Sanjin Elevator: Elevator debugging(b)

Sanjin Elevator: Elevator debugging(b): In addition to commissioning manual on "Fault diagnosis and countermeasures," In addition, we add some common troubleshooting gui...

Elevator debugging(b)

In addition to commissioning manual on "Fault diagnosis and countermeasures," In addition, we add some common troubleshooting guide.
1, 2-storey floor elevator hoistway self-learning how to accomplish?
  Field Description: elevator hoistway complete self-learning, you can make high-speed operation, but after re-power, NICE3000 appear E35, can not be run at high speed.
   Problem Cause: The elevator tool only two layers, wells and self-learning is a floor leveling began. So after making the hoistway self-learning, the resulting leveling flapper pulses F4-05 to 0. The system in the case of each power pulse will be on the floor, efficacy and found flapper pulse number is 0 prompts E35.
   Remedy: Lift out the bottom, from the gate area, and then re-hoistway self-learning can be.
2, synchronous motor-pumped self-learning at E35
   Field Description: elevator hoistway self-learning after each to two flat layers flapper, immediately report E35 tips.
   Cause of the problem: NICE3000 synchronous machine in addition to PG card (MCTC-PG-B), the connection between the two (via CN6) is the system records the rotary encoder pulse basis, but not A corresponds to the PGA; B corresponding to the PGB can, The installation of the way with the unit. Hence, the control system of the hoistway self-learning process, the first two flat layers flapper arrives, the number of pulses within the system records is 0 or a negative value if prompted immediately E35.
   Remedy: Adjust PG card to CN6 wiring. A maintenance operation, see F4-03, and lift up the recognition, the number of pulses increases; downward, the pulse number is reduced.
   Appendix: E35 produces all the reasons
 Before the start: 1, F4-01's current floor data with F6-01 lift the bottom data inconsistencies. 2, under a forced deceleration invalid. 3, F0-00 = 0, the open-loop mode. If the overhaul, the next button is always valid or opening, closing and will not enter button has been effective self-learning operation.
 Operation: 1, a test switch is not in the service position. 2, if the F9-02 within the time set by running the same direction, door zone signal is not received, the elevator will be reported E35. This parameter setting is less than 3S, this function is invalid, not detected. If you have long floor hoistway self-learning, should F9-02 parameter set to less than 3S, self-learning is complete, then changed to 45S. 3, floor height less than 500mm. 4, since the end of the study currently inconsistent with the top floors.
3, the synchronous machine parking brake, the elevator slip car
  Field Description: Live in synchronous machine debugging process and found that each parking brake at the same time, the car has slipped car feel.
  Cause of the problem: synchronous and asynchronous machine machine parking brake moments are different. The same time is not enough torque to maintain. Because synchronous machine without transmission damping, at the moment if you do not brake extension torque at zero speed maintenance time, it is easy to slip.
Remedy: The F8-11 = 0.2 seconds Default parameters, the scene changed to 0.4 seconds.
4, the lift is E38 tips
  Field Description: The elevator car door zone does not start at E38 fault, open the door. Check fault information records and found that failure rate has reached the rated speed, the current is more than the rated current.
  Cause of the problem: the elevator door zone starts, the brake is not fully open, set in F1-13 encoder detects code disc is not received within the time signal, and during this time the speed command and drive the elevator reached the rated current has been issued values.
  Remedy: Check the brake power is normal; checking brake contactor loop control of all auxiliary point whether there is an exception. Check the encoder used correctly. Increased brake detection switch to detect open judgment, if the detected fault is not passed immediately reported E37.

Sanjin Elevator: Elevator debugging(a)

Sanjin Elevator: Elevator debugging(a): Elevator commissioning phase, be sure no one within the hoistway and the car's circumstances! Order to avoid accidents. A mechanical i...

Elevator debugging(a)

Elevator commissioning phase, be sure no one within the hoistway and the car's circumstances! Order to avoid accidents.
A mechanical installation, electrical wiring inspection
Correct installation is to ensure that each part of an important guarantee for comfortable operation of the elevator door system installation, PAD sensor and flapper with, terminal switch frame and hit the bow tie and so on. Strict compliance with system wiring wiring and correct wiring, especially
2 Encoder check: Install securely, using shielded cable, power line alignment must be sub-tank layout, go independent metal protective tube, encoder feedback pulse signal is to achieve an important guarantee for precision control.
3 Power: Check the bus capacity, three-phase five-wire system; voltage fluctuations within the standard range.
4.Ground check: Check the power supply terminal PE and ground resistance should be infinite, check all electrical components elevator tool terminals and control cabinet PE ground line resistance should be as small as possible.
5 Power-examination: the corresponding measured drawings of the control supply voltage; inspection F5 set of parameters set at various points with the drawings functional requirements are the same. Check the F0 group, F1 group, F6 group, F8 group parameters are set in line with the requirements of the contract.
6 Maintenance Commissioning: Check the input and output signals, the direction, the encoder counting direction, communication is normal.
7 The door system debugging: manual debugging door control is normal, the switch should be smooth door, close the door should not be hit, if you can adjust the crawling speed or deceleration time. Machinery to consider the doors from the complex, the door blade and each gate croquet with the size, to ensure that each landing door to run freely.
8 Express debugging: to ensure the well to flow, mechanical and electrical parts installed ends, without any short wires; electrical wiring and parameters of each set correctly. Hoistway self-learning; weighing self-learning; AMB Group F1 function keypad or keyboard F7 test functions into single test run, observe the operating status and door systems are performed as required. After correct, then other relevant functional testing. Finally, the whole comfort debugging.

Sanjin Elevator: Elevator inverter plays what role in the elevator

Sanjin Elevator: Elevator inverter plays what role in the elevator: If the given acceleration time is too short, the elevator inverter output frequency changes much more than speed (electrical angular freque...

Elevator inverter plays what role in the elevator

If the given acceleration time is too short, the elevator inverter output frequency changes much more than speed (electrical angular frequency) change, the drive will overcurrent flows due to trip, running stop, which is called stall. In order to prevent stalling of the motor continues to run, it is necessary for detection of the current size of the frequency control. When the acceleration current is too large appropriate to slow down the acceleration rate. Deceleration as well. Combine the two is the stall function.
Acceleration and deceleration can be respectively given model, for quick acceleration, slow deceleration occasions, or for a small machine requires strict tact time given occasion is appropriate, but for the fan drive and other occasions, acceleration and deceleration time longer acceleration time and deceleration time can be given together.
If you lower the motor during operation command frequency, the motor becomes non-state synchronous generator running, while working as a stopper, which is called regenerative (electric) braking.
Regenerative energy from the motor out of the piling in the elevator inverter filter capacitor, the capacitance of the capacitor and the voltage relationship between the general frequency of the rated torque of the regenerative braking force of 10% -20%. If using the optional parts brake unit, can reach 50% -100%.
Automatic control system signal can be set freely by the elevator inverter flexible frequency change command and control process indicators, such as in the tobacco industry, sugar, spices process, known by the belt drive traffic signals to control the frequency of the rotational speed of the pump with the flow signal changes automatically adjust feeding amount evenly add flavor, sugar. Production line can also use start-stop signal through the positive and negative terminals of the elevator inverter control starting and stopping and positive, reverse and become a part of automatic assembly line. In addition, in the assembly line, the current device is faulty rear side equipment should be automatically shut down. elevator inverter emergency stop client can achieve this functionality. In SANKEN, MF, FUT and FVT series elevator inverter can be pre-set three or four or even up to seven frequencies, some devices can be set accordingly automated production processes. Set frequency and time, the drive motor can sequentially at different times with different speed operation, to form an automated production process.

Sanjin Elevator: Elevator inverter plays what role in the elevator ...

Sanjin Elevator: Elevator inverter plays what role in the elevator ...: Frequency down (low), if the same power output, the current increases, but under certain conditions, the torque current is almost constant....

Elevator inverter plays what role in the elevator (b)

Frequency down (low), if the same power output, the current increases, but under certain conditions, the torque current is almost constant.
Using elevator inverter operation, with a corresponding increase in the acceleration of the motor frequency and voltage, the starting current is limited to 150% of rated current (according to different models, 125% -200%). Labor-frequency power directly when starting current of 6-7 times, therefore, will have an impact on the mechanical and electrical. With elevator inverter drive can smoothly start (start time becomes longer). Starting current of 1.2-1.5 times the rated current, starting torque of 70% -120% of the rated torque; For enhanced functionality with automatic torque converter, the starting torque of 100% or more, you can start with a full load .
Frequency drops voltage V is also proportional to the decline, the question has been answered four instructions. The ratio between V and F are considered characteristic of the motor determined in advance, usually in the controller memory means (ROM) in that there are several features that can switch or the dial to select.
Down completely when the frequency is reduced proportionally to the voltage, the impedance becomes smaller as the DC resistance constant, would result in a low torque is generated under a reduced tendency to. Therefore, given the low frequency V / F, the output voltage is increased to make some manner so as to obtain a starting torque, this compensation called enhanced start. Variety of methods can be used, a method of automatically select V / F mode or adjusting potentiometer and other methods.
In 6Hz still output power, but according to the temperature rise and motor starting torque of the size of the other conditions, the lowest frequency of use to take 6Hz, at which point the motor rated torque can be output without causing severe heat problems. Actual elevator inverter output frequency (starting frequency) based on models for the 0.5-3Hz.
Normally when not. Above 60Hz (50Hz or more modes also) voltage constant, a substantially constant power characteristics, require the same torque at high speed, we must pay attention to the choice of motor and elevator inverter capacity.
Motor means to be used for speed detection device (PG), the actual speed back to the control means controls, called "closed loop", without PG operation is called "open loop." Universal Converter, mostly open-loop mode, and some models can be use PG feedback option.
Open-loop, the elevator inverter even if the output for a given frequency, the motor with a load operation, the motor speed in the range of the rated slip (1% -5%) change. For applications requiring speed accuracy is relatively high, even if the load change also requires close to a given speed operation of the occasion, PG feedback function can be used with the drive (optional part).
With PG feedback function of the elevator inverter, the accuracy improves. But the speed depends on the accuracy of implant PG itself elevator inverter output frequency accuracy and resolution.

Sanjin Elevator: Elevator inverter plays what role in the elevator ...

Sanjin Elevator: Elevator inverter plays what role in the elevator ...: The main role of the elevator inverter by changing the frequency of alternating current, energy efficiency and speed, and to achieve automa...

Elevator inverter plays what role in the elevator (a)

The main role of the elevator inverter by changing the frequency of alternating current, energy efficiency and speed, and to achieve automatic control and precision control.
The elevator inverter is the use of power semiconductor devices will be the role-off frequency to another frequency power conversion power control devices. Can be divided into AC - AC elevator inverter, AC - DC - AC elevator inverter. AC - AC elevator inverter alternating current into direct are variable frequency and voltage AC; AC - DC - AC elevator inverter is first rectified alternating current into direct current by the rectifier first, and then through the elevator inverter to the DC current and voltage can be changed into a frequency of alternating current.
PWM is the English Pulse Width Modulation (Pulse Width Modulation) acronym, according to certain rules to change the pulse width of the pulse train to adjust the output volume and a tone waveform by value. PAM is the English Pulse Amplitude Modulation (pulse amplitude modulation) acronym is changed according to certain rules pulse amplitude pulse train, to regulate the output value and a modulation waveform.
elevator inverter main circuit can be divided into two categories: voltage is converted to DC voltage source elevator inverter AC and DC circuit filter is a capacitive; Current DC current source is converted to AC elevator inverter, its stone DC circuit filter inductor.
Asynchronous motor torque and the rotor flux of the motor a current flows resulting from the interaction between the rated frequency, if the voltage is fixed and only reduce the frequency, then the magnetic flux will be too large, the magnetic circuit saturation, severe when burning motor. Therefore, the frequency and voltage proportional to a change, that is to change the frequency converter output voltage while controlling the motor to maintain a certain flux, to avoid weakening and magnetic saturation phenomenon. This control method is used for fan and pump energy-saving elevator inverter.

Sanjin Elevator: Routine maintenance of the elevator inverter

Sanjin Elevator: Routine maintenance of the elevator inverter: Application has been common drive fans, pumps, etc. to expand into the food, beverage, logistics, elevator drive internal structure buildin...

Routine maintenance of the elevator inverter

Application has been common drive fans, pumps, etc. to expand into the food, beverage, logistics, elevator drive internal structure building, and constantly open new energy field, and its function has also been improved and diversified, one is all-digital, fully functional, able to compensate for load changes adaptive, self-tuning technology, especially distributed communications, networking and integration of PLC-end elevator inverter; hand is simple or industry-specific mechatronic drive as well as small and medium of elevator inverter. In addition, new high-voltage power electronic devices because the advent of high and medium voltage elevator inverter also has made ​​great progress.
If they do maintenance work on the drive, you can greatly decrease the failure rate of the drive:
An elevator electrical room temperature is not too high, otherwise the drive components easy to aging, the best air-conditioned, the consequences quite good;
2, to prevent rain water, usually in a typhoon, the windows broken by the wind leaving the elevator inverter shower to rain;
3, lightning, this would relate to the whole building or all of the district mine facilities, so she was struck by lightning individual elevator inverter severe damage;
4, the drive's cooling fan to regularly dust cleared, the elevator inverter repair method using DC resistance line voltage detection and measurement are two methods and found that there was a noise or exchange will not run;
5, elevator motors unusual noise is usually drive problems, such as motor phase current is not balanced, then the best we must repair the damage is not complete until the elevator inverter may be more severe.

Sanjin Elevator: Elevator use the elevator inverter issues

Sanjin Elevator: Elevator use the elevator inverter issues:     With the power thyristor (SCR) power transistor (GTR) and the new field-effect transistor (IGBT) have come out, frequency conversion te...

Elevator use the elevator inverter issues

    With the power thyristor (SCR) power transistor (GTR) and the new field-effect transistor (IGBT) have come out, frequency conversion technology from the 1960s appeared so far has matured universal use in various electric fields. Elevators and other special mechanical and electrical equipment is no exception, the drive also makes the technical content, performance is leaps and bounds, with the traditional way of comparing the effect of speed is fresh obviousness see. It makes the elevator efficiency, smooth running, extend equipment life, combined with a PLC or computer control, but also demonstrate the superiority of non-contact control: Line simplified, flexible control, reliable operation, easy maintenance and fault monitoring. Seen by the elevator inverter works, the installation must meet certain requirements in order to work properly, the elevator inverter itself inevitably produce harmonic interference and electromagnetic radiation and other common problems, but the elevator power is larger, poor working environment, the safety factor requirements high, therefore, led to the elevator inverter in the installation and maintenance of a number of issues.

1, harmonic interference problems
1.1 Interference of the mechanism
    elevator inverter main circuit is generally cross - straight - cross forms, namely rectifier (AC / DC) and an elevator inverter section (DC / AC) component, the first three-phase bridge rectifier power supply, and then by power transistor switching element for DC / AC converter.
    In the input section, the input voltage is a sine wave, nonlinear three-phase bridge rectifier diodes and discrete diode parameters will cause a non-sinusoidal input current waveform. In the output section, the output line voltage is SPWM pulse width modulated square wave, the phase voltage is a step wave, are nonlinear. The output current is nearly sinusoidal with a burr. Since it is a non-linear sine wave, then he will produce harmonics. Theoretically, harmonics multiple of 3 does not contain harmonics and even harmonics, the Fourier series decomposition according to the fundamental and harmonic, and generally contains 6n +1 (n = l, 2,3 ... .) harmonics. Harmonic frequency elevator inverter modulation frequency, which were 5, 7, 11, 13th harmonic current dominant.
1.2 Interference hazards
    Input current harmonic distortion causes the grid voltage, causing the impact on other electrical equipment, such as the transformer temperature rise, resulting in vibration noise; cause protection of electrical malfunction; cause measuring instrument error; insulation damage, affecting the electrical work and reduce life expectancy and so on.
    According to GB12668-90 requirements management standards of higher harmonic voltage integrated grid voltage harmonic distortion is THD% ≤ 10%, odd harmonics THD% ≤ 5%, even harmonics THD% ≤ 2%.
    Both output voltage and current harmonics, the modulation frequency is low, the human ear could hear high harmonic frequencies generated electromagnetic noise (screams), harmonic heat and vibration caused by the motor, the peak voltage or insulation breakdown , reactive big loss, cosφ reduction. Modulation frequency higher harmonics impact should be small, but no matter the level of the modulation frequency, harmonic electromagnetic coupling are formed through the wire inductive interference, and through the cable to the space launch high-frequency electromagnetic radiation interference on the surrounding lines, electrical equipment and other adverse effects, such as interference with the elevator door control signal so that it is not working properly, the computer board LCD error, computer clocks stop working. Under normal circumstances, the elevator inverter output harmonic voltage THD% of total synthesis should be controlled at between 5% to 7%.
1.3 Interference suppression
    Regardless of the input or output harmonic interference caused by nothing more than its mode of transmission line conduction, inductive coupling and air radiation in three ways, so the interference suppression measures we have from several aspects:
    (1) connected reactors and filters. Input access to AC reactor ACL, it 5-9 harmonics suppression effect is very significant, cosφ also be increased to 75% to 85%, the output is generally not connected to the reactor, the reactor when choosing the best drop controlled at 5% or less. Connected in series between the rectifier bridge and filter capacitor DC reactor DCL also markedly inhibited the harmonic currents and improve power factor. Then the power filter should pay attention to: the output side of the filter capacitor connected to the motor side only, and should be connected resistors to prevent the elevator inverter due to capacitor charging and discharging by shock, filter reactor phase connection cable must be in the same direction around the In the same magnetic core to no effect on the fundamental current. Capacity greater than 22KW generally used in parallel when the power supply filter.
2) reasonable shielded cabling and wiring. Use separate transformer elevator inverter power elevator inverter simultaneously use two more to be away from each other; Other equipment and control lines in the layout as far away from the elevator inverter input and output lines (minimum is also more than 10cm), and do not run in parallel with line, the best vertical cross; signal control lines twisted inhibit phase differential mode interference signal; reasonable ground wiring devices harmonic interference suppression also one of the ways, according to state regulations in addition to grounding wire with a grounding wire to ensure sufficient grounding resistance of less than 5Ω, the elevator inverter should be grounded separately, grounding point as close to the elevator inverter, ground wire away from power lines can not be connected and the power of the zero line; pair of main circuit (elevator inverter to the motor cable) for wear metal tube shield, and as short as possible, control signal lines can also be used shielded cable, shielded cable should be close to the side of the elevator inverter control circuit is connected to the COM terminal, while the shield grounded at one end only.
    (3) Other equipment interfere with isolation transformer on the grid for power supply isolation, with photocoupler isolation disturbed signal.
    (4) may also reduce the carrier frequency relative to eliminate the interference, but the noise might be a little bigger, the current waveform smoothness to be satisfactory, the specific site commissioning OK. I encountered appeared in the elevator debug the door harmonic interference signal error, the carrier frequency between 8 ~ 10K reduction in the value of the appropriate troubleshooting.
    (5) can also be used when necessary, zero-phase-sequence reactance, surge absorber and surge suppressors.

Sanjin Elevator: Elevator inverter principle (c)

Sanjin Elevator: Elevator inverter principle (c): We repair a lot of the elevator elevator inverter schematic elevator inverter for elevator and found a lot of trouble because of their work...

Elevator inverter principle (c)

We repair a lot of the elevator elevator inverter schematic elevator inverter for elevator and found a lot of trouble because of their work environment through high temperature components likely caused by aging, elevator elevator inverter installed in the building's topmost control room, often in the summer by sun exposure, coupled with the drive itself and the braking resistor heating, the electrical room temperature is very high, the working environment temperature will shorten the life of electronic components! Drive more obvious in this regard, the elevator electrical room ventilation problems in the design in addition to also pay attention to insulation, such as walls with hollow bricks, chamber top multi-layer design, if accompanied by an air conditioner, the drive's lifespan considerably longer !

Sanjin Elevator: Elevator inverter principle (b)

Sanjin Elevator: Elevator inverter principle (b): Typically, the voltage and frequency fixed frequency alternating current is converted to a variable frequency AC voltage or a device called...

Elevator inverter principle (b)

Typically, the voltage and frequency fixed frequency alternating current is converted to a variable frequency AC voltage or a device called a "drive." In order to generate a variable voltage and frequency, the device is first necessary to convert AC power to DC (DC), this process is called rectification. The direct current (DC) is converted into alternating current (AC) of the device, its scientific term for the "elevator inverter" (elevator inverter). General elevator inverter is the DC power elevator inverter is a certain fixed frequency and constant voltage power elevator inverter. For the adjustable frequency elevator inverter, voltage adjustable frequency elevator inverter we called. elevator inverter output waveform is an analog sine wave, is mainly used in three-phase induction motor drive with, also known as elevator inverter. Mainly used in the instrumentation for the detection devices require a higher variable frequency wave elevator inverter, to sort out the waveform, you can output standard sine wave, called the variable frequency power supply. Frequency power elevator inverter prices are generally 15 - 20 times. Since the elevator inverter device generates a voltage or frequency changes in the primary device called "elevator inverter", so the product itself is named "elevator inverter", namely: elevator inverter. elevator inverter can also be used in home appliances products. Use the elevator inverter home appliances products, not only motor (such as air conditioning, etc.), as well as fluorescent lamps and other products. elevator inverter for motor control, either change the voltage, but also can change the frequency. But are used primarily for regulating fluorescent lamp elevator inverter power supply frequency. Used car battery (DC) to produce alternating current devices "elevator inverter" name for sale. The working principle of the elevator inverter has been widely used in various fields. Such as computer power supply, in the application, the drive for inhibiting reverse voltage, frequency fluctuations and power of instantaneous power.

Sanjin Elevator: Elevator inverter principle (a)

Sanjin Elevator: Elevator inverter principle (a): Now elevators are used to control the frequency converter, the fault when the elevator inverter will cause inconvenience to many people, i...

Elevator inverter principle (a)

Now elevators are used to control the frequency converter, the fault when the elevator inverter will cause inconvenience to many people, if maintenance personnel can correctly understand the principle of elevator drive, then you have easy maintenance. Here by us Hui Bo Times Technology Co., Ltd. was telling you about this knowledge.
VVVF Variable Voltage and Variable Frequency is the acronym meaning changing the voltage and frequency of change, that is, they say, VVVF.
CVCF is Constant Voltage and Constant Frequency acronym, meaning constant voltage, constant frequency, that is, they say, constant voltage constant frequency.
We use the power into AC power and DC power, DC power supply generally mostly through the transformer from the AC power source transformer, rectifier obtained. AC power using the power of the people accounted for 95% of the power used. Whether for home or for factories, single-phase and three-phase AC power supply, the voltage and frequency according national regulations have certain criteria, such as mainland China provides direct user single-phase AC power is 220V, three-phase AC wire voltage 380V, frequency of 50Hz, other countries may be in supply voltage and frequency of the voltage and frequency are different, if single-phase 100V/60Hz, three phase 200V/60Hz, etc., the standard voltage and frequency of the AC power supply called frequency alternating current.

Sanjin Elevator: Elevator inverter basics (b)

Sanjin Elevator: Elevator inverter basics (b): 1, was written in the manual speed range 60 ~ 6Hz, namely 10:1, then the following 6Hz no output power do? In 6Hz still output power, but ...

Elevator inverter basics (b)

1, was written in the manual speed range 60 ~ 6Hz, namely 10:1, then the following 6Hz no output power do?
In 6Hz still output power, but according to the temperature rise and motor starting torque of the size of the other conditions, the lowest frequency of use to take 6Hz, at which point the motor rated torque can be output without causing severe heat problems. Actual elevator inverter output frequency (starting frequency) based on models for the 0.5 ~ 3Hz.
2, for the general motor combination is above 60Hz also requires a certain torque, can we?
Normally when not. Above 60Hz (50Hz or more modes also) voltage constant, a substantially constant power characteristics, require the same torque at high speed, we must pay attention to the choice of motor and elevator inverter capacity
3, the so-called open-loop What does it mean?
Motor means to be used for speed detection device (PG), the actual speed back to the control means controls, called "closed loop", without PG operation is called "open loop." Universal Converter, mostly open-loop mode, and some models can be use PG feedback option.
4, the actual speed deviation for a given speed on how to do?
Open loop, even if the output for a given frequency of the elevator inverter, the motor with the load operation, the motor speed at the rated slip of the range (1% to 5%) change. For applications requiring speed accuracy is relatively high, even if the load change also requires close to a given speed operation of the occasion, PG feedback function can be used with the drive (optional part).
5, if a motor with PG, feedback can improve speed accuracy after you?
With PG feedback function of the elevator inverter, the accuracy improves. But the speed depends on the accuracy of implant PG itself elevator inverter output frequency accuracy and resolution.
6, stall prevention function is what does this mean?
If the given acceleration time is too short, the elevator inverter output frequency changes much more than speed (electrical angular frequency) change, the drive will overcurrent flows due to trip, running stop, which is called stall. In order to prevent stalling of the motor continues to run, it is necessary for detection of the current size of the frequency control. When the acceleration current is too large appropriate to slow down the acceleration rate. Deceleration as well. Combine the two is the stall function.
7, there is acceleration time and deceleration time can be given, respectively, models, and ramp time together given the aircraft, what's the point?
Acceleration and deceleration can be respectively given model, for quick acceleration, slow deceleration occasions, or for a small machine requires strict tact time given occasion is appropriate, but for the fan drive and other occasions, acceleration and deceleration time longer acceleration time and deceleration time can be given together.
8 What is regenerative braking?
If you lower the motor during operation command frequency, the motor becomes non-state synchronous generator running, while working as a stopper, which is called regenerative (electric) braking.

Sanjin Elevator: Elevator inverrter Basics(a)

Sanjin Elevator: Elevator inverrter Basics(a):    1, what is the frequency? The elevator inverrter is the use of power semiconductor devices will be the role-off frequency to another fr...

Elevator inverrter Basics(a)

   1, what is the frequency?
The elevator inverrter is the use of power semiconductor devices will be the role-off frequency to another frequency power conversion power control devices.
   2, PWM and PAM What is the difference?
PWM is the English Pulse Width Modulation (Pulse Width Modulation) acronym, according to certain rules to change the pulse width of the pulse train to adjust the output volume and a tone waveform by value. PAM is the English Pulse Amplitude Modulation (pulse amplitude modulation) acronym is changed according to certain rules pulse amplitude pulse train, to regulate the output value and a modulation waveform.
   3, voltage-and current-What is the difference?
elevator inverrter main circuit can be divided into two categories: voltage is converted to DC voltage source elevator inverrter AC and DC circuit filter is a capacitive; Current DC current source is converted to AC elevator inverrter, its stone DC circuit filter inductor.
   4, why the elevator inverrter voltage and current proportional to the change?
Induction motor magnetic flux and the torque of the motor and the rotor current flows resulting from the interaction between the rated frequency, if the voltage is fixed and only the lower frequency, then the magnetic flux will be too large, the magnetic circuit saturation, severe The burning motor. Therefore, the frequency and voltage proportional to a change, that is to change the frequency converter output voltage while controlling the motor to maintain a certain flux, to avoid weakening and magnetic saturation phenomenon. This control method is used for fan and pump energy-saving elevator inverrter.
   5, motor drive using frequency power supply, the voltage drop is current increases; For elevator inverrter-driven, if the frequency drops voltage drop, then the current is increased?
Frequency down (low), if the same power output, the current increases, but under certain conditions, the torque current is almost constant.
   6, using the elevator inverrter operation, the motor starting current, starting torque what?
Using elevator inverrter operation, with a corresponding increase in the acceleration of the motor frequency and voltage, the starting current is limited to 150% of rated current (according to different models, 125% to 200%). Labor-frequency power directly when starting current of 6 to 7 times, therefore, will have an impact on the mechanical and electrical. With elevator inverrter drive can smoothly start (start time becomes longer). Starting current for the rated current of 1.2 to 1.5 times the starting torque of 70% to 120% of the rated torque; For enhanced functionality with automatic torque converter, the starting torque of 100% or more, you can start with a full load.
   7, V / f mode What does it mean?
Frequency drops voltage V is also proportional to the decline, the question has been answered four instructions. The ratio between V and f are considered characteristic of the motor determined in advance, usually in the controller memory means (ROM) in that there are several features that can switch or the dial to select.
   8 and proportionate change V and f, the motor torque to change?
Down completely when the frequency is reduced proportionally to the voltage, the impedance becomes smaller as the DC resistance constant, would result in a low torque is generated under a reduced tendency to. Therefore, given the low frequency V / f, the output voltage is increased to make some manner so as to obtain a starting torque, this compensation called enhanced start. Variety of methods can be used, a method of automatically select V / f pattern or adjusting potentiometer and other methods.