The main function of an electric motor is to convert electrical energy into mechanical energy to drive various mechanical devices, while a generator converts other forms of energy, such as chemical energy, water energy, or wind energy, into mechanical energy first, and then converts mechanical energy into electrical energy.

The motor has good controllability, and the speed and torque of the motor can be easily adjusted by controlling the voltage and current. Meanwhile, the maintenance of the motor is relatively simple, with fewer parts and no need for lubrication, making maintenance work easier.