Does the number of inverter settings differ from the number of motor poles, and does it affect the use?
Simple applications are unaffected. But if the high-end applications, such as elevators, cranes and other frequency converter using self-learning mode, the control performance will be affected. Common applications only affect the display speed of the inverter, and have no influence on the control equipment.
The influence of the inverter on the motor control model, in addition to the speed difference, basically does not affect much
1. motor speed control will not be accurate2. the working current of the motor may become larger, and the motor will be burnt out3., excitation what will change, but also may cause the motor heating, burnout, will also reduce the efficiency of the motor;4. may also burn the inverter.5. motor output may be affected.
Frequency converter has a number of requirements, if the motor is not set by the number of motor parameters, I think there will be the following problems, but may occur, I have not been verified:
When the number of poles of the motor is corresponding to the speed of the motor and the number of the poles is not set, the speed is controlled, and the speed is very difficult to drive.Frequency converter (Variable-frequency, Drive, VFD) is the application of frequency conversion technology and microelectronics technology, by changing the power supply frequency of the motor to control AC motor power control equipment. The frequency converter is mainly composed of rectifier (AC DC converter), filter, inverter (DC AC converter), brake unit, drive unit, detection unit, micro processing unit and so on. Inverter by internal IGBT drive voltage and frequency off to adjust the output power, the power supply voltage required to provide according to the actual needs of the motor, so as to achieve the purpose of speed, energy saving, in addition, there are a lot of protection drive, such as over-current, over-voltage, overload protection and so on. With the continuous improvement of the degree of industrial automation, inverter has also been widely used.
