According to the power supply classification:
(1) DC motor
Using permanent magnets or electromagnets, brushes, commutators and other components, the brushes and commutators continuously supply the DC power supplied from the outside to the coil of the rotor, and change the direction of the current in time, so that the rotor can follow the same direction. Keep spinning.
(2) AC motor
The alternating current is passed through the stator coil of the motor, and the surrounding magnetic field is designed to push the rotor at different times and at different positions to keep it running
(3) Pulse motor
The power supply is processed by the digital IC chip and turned into a pulse current to control the motor. The stepping motor is a kind of pulse motor.

Classification by construction (both DC and AC power sources):
(1) Synchronous motor
The characteristics are that the constant speed does not need to be adjusted, the starting torque is small, and when the motor reaches the operating speed, the speed is stable and the efficiency is high.
(2) Asynchronous motor
(3) Induction motor
It is characterized by simple and durable structure, and can use resistors or capacitors to adjust the speed and forward and reverse rotation. Typical applications are fans, compressors, and air conditioners.
(4) Reversible motor
Basically, the structure and characteristics of the induction motor are the same as that of the induction motor. The amount of overturn generated by the force.
(5) Stepping motor
It is characterized by a kind of pulse motor. The motor that rotates gradually at a certain angle is processed by the open-loop control method, so it does not need a feedback device for position detection and speed detection, and can achieve precise position and speed control, and good stability
(6) Servo motor
It is characterized by precise and stable speed control, quick acceleration and deceleration response, rapid action (rapid reversal, rapid acceleration), small size and light weight, high output power (ie high power density), and high efficiency. It is widely used in position and speed control. superior.
(7) Linear motor
It has a long-stroke drive and can exhibit high-precision positioning capabilities.
Others: rotary converter, rotary amplifier, etc.