Sanjin Elevator: Drive braking situations

Sanjin Elevator: Drive braking situations:                   Refers to the energy from the motor side to the drive side (or the power supply side), then the motor speed above synchr...

Drive braking situations

         
        Refers to the energy from the motor side to the drive side (or the power supply side), then the motor speed above synchronous speed.
   
        Load energy into kinetic energy and potential energy kinetic energy (determined by the speed and weight of its size) with the motion of the object and accumulate. When the kinetic energy is reduced to zero, the things it is in a stopped state.
   
        Mechanical brake method is to use the brake friction and the object is converted to kinetic energy consumed.
   
        For the elevator parts - elevator inverter, if the output frequency is reduced, the motor speed will follow the same frequency decreases. Then will produce braking process generated by the braking power will be returned to the elevator inverter side. The power can be consumed by resistance heating.
   
        In the category for lifting loads in decline, energy (potential energy) should return to the elevator inverter (or power) side of the brake.
   
        This method of operation is referred to as "regenerative braking", and the method can be applied to the drive brake.
   
        During deceleration, the power generated by heat consumption if the method is not consumed, but the energy is returned to the power supply side of the drive method is called "power back regeneration method." In practice, this application needs "energy feedback unit" option.

Sanjin Elevator: Reduce heat control cabinet

Sanjin Elevator: Reduce heat control cabinet: When the drive is installed in the control cabinet, the calorific value of the elevator parts - elevator inverter to consider the question...

Reduce heat control cabinet

When the drive is installed in the control cabinet, the calorific value of the elevator parts - elevator inverter to consider the question.
   
        According to the heat generated within the cabinet value increases, to appropriately increase the size of the cabinet. Therefore, if the control cabinet to minimize the size, it is necessary to make the heat generated in the enclosure to minimize the value.
   
        If the drive is installed, the elevator inverter radiator parts into the outside of the control cabinet, will make the drive has 70% of the heat released to the outside of the control cabinet. Since large-capacity elevator inverter has a great amount of heat, so the large capacity drive more effective.
   
        You can also use isolation plates separated from the main body and the radiator, the radiator cooling does not affect the converter body. This effect is also very good.
   
        elevator inverter cooling design is based on a vertical installation, put sideways heat will deteriorate!

Sanjin Elevator: Elevator inverter starting current

Sanjin Elevator: Elevator inverter starting current:         When the motor starts running, the elevator inverter output current         ------ elevator inverter drive when starting torque and ...

Elevator inverter starting current

        When the motor starts running, the elevator inverter output current

        ------ elevator inverter drive when starting torque and maximum torque is less than the direct labor-power-driven ------

        Electric power supply in the frequency and acceleration when starting a big impact, and when using the elevator inverter power supply, these shocks will be weaker. Direct starting frequency will produce a large starting current. When using the elevator inverter, the elevator inverter output voltage and frequency is gradually applied to the motor, so the motor starting current and the impact to be smaller.

        Typically, the torque generated by the motor to decrease with increasing frequency (speed reduction) decreases. Reduce the actual data in the elevator parts - elevator inverter manual will give some explanation.

        By using flux vector control elevator inverter, will improve low-speed torque motor deficiency, even in the low speed range the motor can also be output sufficient torque.

Sanjin Elevator: Elevator inverter works

Sanjin Elevator: Elevator inverter works: When the elevator parts - elevator inverter to greater than 50Hz frequency, the motor output torque will be reduced.        The motors ar...

Elevator inverter works

When the elevator parts - elevator inverter to greater than 50Hz frequency, the motor output torque will be reduced.
       The motors are generally designed and manufactured according to 50Hz voltage, the rated torque in this voltage range is given. Therefore, under the nominal frequency governor called constant torque speed. (T = Te, P <= Pe)
       Frequency converter output frequency is 50Hz, the torque generated by the motor and the frequency is inversely proportional to to decrease the linear relationship.
       When the motor speed greater than 50Hz frequency, the motor load size must be given consideration to prevent the motor output torque is insufficient.
       For example, the motor torque generated at about 100Hz to 50Hz, the generated torque is reduced to 1/2.
       Therefore, above the rated frequency governor called the constant power speed. (P = Ue * Ie)
   
(Six) than 50Hz elevator inverter applications
       As you know, for a particular motor, the rated voltage and rated current is constant.
       Such as the elevator inverter and motor ratings are: 15kW/380V/30A, motors can operate at 50Hz or more
       When the speed is 50Hz, the elevator inverter output voltage is 380V, current is 30A. Then if increasing the output frequency to 60Hz, maximum elevator inverter output voltage and current can only to 380V/30A. Obviously the output power constant. So we called constant power speed.
       Then the torque situation do?
       Since P = wT (w: angular, T: torque) because P constant, w increased, so torque is reduced accordingly.
       We can also find another point of view:
       The stator voltage U = E + I * R (I is the current, R is the electrical resistance, E is the EMF)
       As can be seen, U, I is constant, E is constant.
       And E = k * f * X, (k: constant, f: frequency, X: flux), when f the 50 -> 60Hz, X is reduced accordingly
       The motor is, T = K * I * X, (K: constant, I: current, X: flux), so the torque T will follow the flux X decreases.
       At the same time, less than 50Hz, since the I * R is small, so the U / f = E / f constant, the magnetic flux (X) is constant and the current is proportional to the torque T, which is why usually the drive to describe its flow capacity overload (torque) capabilities. known as constant torque speed (rated current is constant -> Maximum torque constant)
       Conclusion: When the elevator inverter output frequencies from 50Hz above increases, the output torque of the motor is reduced.

Sanjin Elevator: The role of the elevator inverter components

Sanjin Elevator: The role of the elevator inverter components: Capacitor C1: A snubber capacitor, the rectifier circuit output pulsating DC voltage, must be filtered, The transformer is a common electric...

The role of the elevator inverter components

Capacitor C1:

A snubber capacitor, the rectifier circuit output pulsating DC voltage, must be filtered,

The transformer is a common electrical equipment, can be used to a certain value of the alternating voltage is converted into another value with the frequency of the alternating voltage can be changed and the value of the AC impedance conversion or change the phase.

Varistor:

There are three roles, an over-voltage protection, two lightning-resistant requirements, three safety testing needs.

Thermistor: overheating protection

Hall:

Installed in one of two phases UVW, for detecting the output current. When used motor rated current rated current is about 2 times.

Charging resistor:

Role is to prevent the power switched capacitor instantaneously shorted to ground, burned before starting the storage capacitor capacitance two-terminal voltage of 0V; so the power (power) of the moment capacitance to ground short-circuit condition. If not charge resistor between the rectifier bridge and electrolytic capacitors, the equivalent 380V power supply directly to ground short circuit, instantaneous rectifier bridge through infinite current causes the rectifier bridge blown up. Generally the greater the power elevator inverter, charge resistor is smaller. The choice of the charging resistor is generally :10-300Ω.

Storage capacitor:

Also known as electrolytic capacitors, the main role in the charging circuit for the energy storage and filtering. PN terminal voltage voltage operating range is generally between 430VDC ~ 700VDC, and general high-voltage capacitors are 400VDC or so, in order to meet the need for pressure to be two 400VDC capacitor string together for 800VDC. Capacity choice ≥ 60uf / A

Equalizing Resistance: prevent uneven burn energy storage capacitor voltage energy storage capacitors; electrolytic capacitor can not be made because of two completely consistent, so that each capacitor voltage exposure may differ, withstand voltage, high fever severe (equivalent series resistance capacitor inside) or more pressure values ​​and damage.

C2 capacitor;

Snubber capacitor, the main role is to absorb the IGBT over-current and over-voltage energy.

(2) straight - cross section

VT1-VT6 elevator inverter tube (IGBT insulated gate bipolar power transistor): The main components constituting the elevator inverter circuit, the elevator inverter is the core component. The DC elevator inverter frequency and amplitude are adjustable AC.

VT1-VT6 is the freewheeling diode: the role is to the motor during braking regenerative current return path for providing DC elevator inverter tube VT1-VT6 alternately turned on and off in the commutation process, providing channels.

(3) control parts: power supply board, driver board, control board (CPU board)

Power Board: switching power supply circuit to the control panel, control board, the drive circuit, the detection circuit and fan to provide low-power, low-voltage power supply switching power supply there: ± 5V, ± 15V, ± 24V to the CPU of its subsidiaries circuit, control circuit , display panels to provide power.

Driver board: the CPU is mainly generated by the PWM pulse drive circuit that meets the requirements of the drive signal excitation IGBT output voltage.

Control Board (CPU board): Also called the CPU board rather the human brain, as well as a variety of signal processing control program and other parts.

Sanjin Elevator: Otis elevator PCB LCB-II parameter specification

Sanjin Elevator: Otis elevator PCB LCB-II parameter specification: OCSS: No. Symbol Def. Purpose and Range Explanation 0 CPR-T 20 ...

Otis elevator PCB LCB-II parameter specification

OCSS:

No.	Symbol	Def.	Purpose and Range	Explanation
0	CPR-T	20	Car call preference : 0 ( 0.1 )  25.5s Note : Time interval beginning from car arrived and opened door in which car calls have priority over hall calls. This is usable eg. for single automatic Push Button and Down Collective operation.
1	ARD-P	255	Automatic Return Device Position : 0 (1)  31 >31  Disabled Note : Only for simplex ! Car will go to this landing, if no further calls are pending and the Automatic Return Device time ARD-T is expired. Selectable values : BOTTOM to TOP; >31 disable ARD.
2	ARD-T	0	Set delay for ARD mode : 0 ( 10 )  2550s
3	L-PARK	0	Lobby park option : 0    disabled 1    enabled Note : Group only! A second car moves into lobby when the car which parks at lobby....... 0 :    receives a demand 1 :    leaves the lobby
4	CTL / PKS	0	Select CTL or PKS switch : 0    CTL switch is connected ( see also CTL-P, CTL-DO,       CTL-TY ) 1    PKS switch is connected ( see also PKS,PKS-P,       PKS-T )
5	PKS-P	255	Parking service position : 0 (1)  31 >31  disabled
6	PKS-TY	0	Parking Shutoff Type : 0    ETO 1    NAO 2    ETO with door open after shutdown Note : for “0”, after serving all pending car calls, car will           return to PKS position and shutdown after PKS-T.                 “1”, same as above,but after car arrived at PKS           position it can be switched to independent service.                 “2”, like 0, but car will shut down with door open.           see also SETUP PKS-P and PKS-T.
7	PKS-T	0	Parking shutoff Time : 0 (1)  255s Note : Time in sec. to shut down the car after arriving at PKS position. See also setups EN-PKS, PKS-P and PKS-T.
8	PKS-DO	0	PKS default door : When at PKS-P floor, 0    open both doors 1    open front door only 2    open rear door only
9	EN-SHB	0	Enable Separate Hall Buttons : 0    Normal HB-operation 1    Rear HB as Separate Riser. Note: Rear hall calls will be treated as front calls, when the IO numbers and the allowed masks are set. Only available for elevators without any rear door.
10	DCP-T	50	Time until DCP mode ( delayed car protection ) 0 (1)   255s When door is kept open longer than the time selected, the car will go out of group operation. Hall calls assigned to this car will be re-dispatched.
11	CTL-DO	0	CTL default door ( car to any landing ) : When car arrived at the CTL-P floor, 0    both doors will open 1    front door open only 2    rear door open only See also setups CTL-TY, CTL-P, CTL / PKS
12	CTL-P	255	CTL ( Car to any landing ) position : 0 (1)  31 >31   Disabled
13	ANS	0	ANS ( anti nuisance service ) : 0    Disabled >0  Numbered of calls to trigger ANS
14	ATT	0	ATT ( Attendant Service ) type : 0    Start with DCB or RDCB 1    Start with ATTU or ATTD 2    NAO ( USA ) For 2, the door may also be closed without any demand.
15	ASC	0	Independent Service : 0    Start on CCB ( car call button ) 1    Start on DCB or RDCB 2    Start on ISU / ISD 3    NAO ( USA) For 3, operation similar to CHCS, but to close the door, the DCB or RDCB button has to be operated until the door is fully closed.
16	CTL-TY	0	Select Car to Landing Type : 0    ETO ( car returns to CTL floor, serving all car calls on        route and then stays there as long as CTL is operated) 1    NAO ( Same as value 0, but once at CTL floor, car can       be shut down by placing it on independent service and       closing the door with activation of CTLPC input.       Activating CTLPO input opens the door.      See also setups CTL-P and CTL-DO
17	SPEECH	0	Speech mode : 0    Floor messages will only be annunciated on car call 1    Floor messages will be annunciated on hall and car       call.
18	DOC	0	Door Reopen Count : 0                 No limit 1 (1) 255     Number of allowed door reopenings.
19	DS-CCB	0	Disable CCs behind moving car : 0    CCs behind allowed 1    CCs behind not allowed
20	DS-DOB	0	Disable DOB button : 0    DOB / RDOB always enabled 1    DOB disabled if door closed 2    RDOB disabled if door closed 3    Both disabled if door closed

GROUP:

No.	Symbol	Def.	Purpose and Range	Explanation
0	GRP-NO	1	Car identifier in group : 1 (1)  3
1	GROUP	1	Number of cars in group : 1 (1)  3
2	CNL	1	Cars parking in Lobby : 1 (1)  3
3	MIT-ST	0	MIT ( Moderate incoming traffic ) Start delay : 0 (1)  255 s If two cars will leave the lobby within MIT-ST with LNS load, MIT is initiated.
4	MIT-T	0	MIT Time-Out : 0 (1)  255s If no car leaves the lobby with LNS load within MIT-T, MIT operation will be suspended.
5	MIT-VD	0	MIT Variable Interval Dispatch : 0 (1)  255s An assigned car at lobby landing in MIT mode will leave lobby if calls are pending and MIT-VD is expired or if it becomes loaded ( LNS ).
6	DUPK-P	255	Dual Up Peak Border Position : 0 (1)  31        >31    Disabled The elevator group is split into two subgroups if the DUPK input is operated. The selected landing DUPK-P divides the groups. See also setup DUPK-G.
7	DUPK-G	0	Dual Up Peak Grouping : 0    Car belongs to subgroup 1 1    Car belongs to subgroup 2 0 -- Car serves lobby landing and all landings BELOW        DUPK-P landing, but answers no hall calls. 1 -- Car serves lobby landing and all landings ABOVE        DUPK-P landing. This car responds to hall calls. See also setup DUPK-P
8	MOT-T	0	MOT ( Moderate Outgoing traffic ) Time-out : 0 (1)  255s If two cars arrive at lobby landing with LNS load within MOT-T, MOT is initiated. If then no car arrives at lobby with LNS load within the same time interval again, the MOT operation is suspended.
9	EN-CUB	0	Enable Up Call Bypass : 0   Disabled - Car responds to both up and down hall calls. 1   Enabled  - Car responds only to down hall calls.
10	IFS-P	255	Transfer Floor Position : 0 (1)  31        >31    Disabled For groups split into low and high rise subgroups. Position where passenger transfer between groups will take place. Delectable values : BOTTOM to TOP.
11	PARK-1	255	Park Clock Position 1 : 0 (1)  31        >31    Disabled If PCLK1 is operated, PARK-1 is the parking floor instead of ARD-P. Simplex only! PCLK1 has highest, PCLK8 has lowest priority.
12	PARK-2	255	Same as above. If PCLK2 is operated, PARK-2 is the parking floor instead of ARD-P. Simplex only !
13	PARK-3	255
14	PARK-4	255
15	PARK-5	255
16	PARK-6	255
17	PARK-7	255
18	PARK-8	255
19	EN-ZBS	0	Enable separate basement zone : 0    No free car parks in basement zone 1    A free car parks in basement zone