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...