What are the requirements of permanent magnet motor for frequency converter?

1, the inverter drags the synchronous motor to start, that is, the lowest frequency at startup can be reduced to about 1HZ, the acceleration time is set longer, and the load torque is less than the motor torque, so the synchronous motor can be dragged to rotate.

2. The permanent magnet synchronous motor has good dynamic response and large output torque, and its performance and efficiency can't be surpassed by the combination of asynchronous motor and frequency converter. In foreign countries, especially Japan, synchronous motors are not only used in all-electric injection molding machines, but also widely used in ordinary injection molding machines.

3. With the demand of domestic plastic market for product quality and accuracy, the control accuracy of injection molding machine has been improved accordingly, and synchronous motor will be more and more used in injection molding machine.