Advantages and disadvantages of permanent magnet synchronous motor

1, advantages of permanent magnet synchronous motor: high performance, fast acceleration and deceleration and high control accuracy. Under the rated load condition, it can accelerate or decelerate at will by 0. 1 sec, and automatically limit the current and stabilize the voltage to ensure trouble-free optimal control. Speed sensorless current vector control: torque control accuracy 5%; The accuracy of steady speed control is 5.5rpm, and the low frequency load capacity is strong: SVC/0.5 Hz/ 1.50% torque.

2. Disadvantages of permanent magnet synchronous motor: Compared with DC motor, its commutator and brush need more maintenance, which brings inconvenience to application. Compared with asynchronous motor, the maximum torque is restricted by demagnetization of permanent magnet, and its seismic capacity is poor. Limited high speed, low power, high cost and difficult start-up.