1. Different response characteristics of control: PMSM has good control response performance. The control response performance of an induction servo motor is slightly lower.

2. The working principle is different: the rotor inside the permanent magnet synchronous servo motor is a permanent magnet, the drive system controls the U/V/W three-phase current, the rotor rotates under the action of the magnetic field, and the motor has its own encoder feedback signal to the driver . The induction servo motor uses an encoder to realize the closed-loop control of the motor, so it can also be used as a kind of servo motor.

3. Different power: permanent magnet synchronous servo motor has high power density. In the same power range, compared with asynchronous motor, it can make the volume smaller and the weight lighter. Induction servo motor, high power, mature design and reliable operation.

Extended information:

The basic feature of induction motor is that it does not need to be connected to other power sources, and the stator current is directly extracted from the AC system; compared with other motors, asynchronous motors have simple structure, convenient manufacture, use and maintenance, reliable operation, light weight and low cost. .

In the three-phase asynchronous motor, compared with the same speed and the same power DC motor, the weight of the former only accounts for one-half of its weight, and the cost is only one-third. Induction motors can also be easily derived from various series of products according to the requirements of different environmental conditions. It has a load characteristic of approximately constant speed, which can meet the dragging requirements of most industrial and agricultural production machinery.