AC motor is widely used for all low power and low constant speed running equipment.
Synchronous motor is small power consumption, torque, low noise, small size, light weight, easy to use.
The permanent magnet synchronous motor and the slowdown in one body can control the pros and cons of the synchronous motor.
At rated frequency, the motor speed is not affected by voltage and remains stable. If the motor is overloaded or stalled, the motor coil will not burn.