First, according to the type of working power: can be divided into DC motors and AC motors.

---- DC motor can be divided according to the structure and working principle: brushless DC motor and brushed DC motor.

------ brush DC motor can be divided into: permanent magnet DC motor and electromagnetic DC motor.

-------- electromagnetic DC motor is divided into: series-excited DC motor, parallel-excited DC motor, other-excited DC motor and compound-excited DC motor.

-------- permanent magnet DC motor is divided into: rare earth permanent magnet DC motor, ferrite permanent magnet DC motor and alnico permanent magnet DC motor.

---- which AC motors can also be divided into: single-phase motors and three-phase motors.

Second, according to the structure and working principle: can be divided into DC motors, asynchronous motors, synchronous motors.

---- synchronous motor can be divided into: permanent magnet synchronous motor, hysteresis synchronous motor and hysteresis synchronous motor.

---- Asynchronous motor can be divided into: induction motor and AC commutator motor.

------ Induction motors can be divided into: three-phase asynchronous motors, single-phase asynchronous motors and shaded-pole asynchronous motors, etc.

------ AC commutator motor can be divided into: single-phase series excitation motor, AC-DC dual-use motor and push repulsion motor.

Third, according to the starting and running mode: capacitor starting single-phase asynchronous motor, capacitor running single-phase asynchronous motor, capacitor starting running single-phase asynchronous motor and split-phase single-phase asynchronous motor.

Fourth, according to the use of the division: drive motor and control motor.

---- drive motor division: power tools (including drilling, polishing, grinding, slotting, cutting, reaming and other tools) with motor, home appliances (including washing machines, fans, refrigerators, air conditioners, tape recorders, video recorders, video players, vacuum cleaners, cameras, hair dryers, electric razors, etc.) with motor and other general small mechanical equipment (including a variety of small machine tools, small machinery, medical equipment, electronic instruments, etc.) with motor. electronic instruments, etc.) with motors.

---- control motors are divided into: stepper motors and servo motors, etc.

Fifth, according to the structure of the rotor: cage induction motor (the old standard called squirrel cage asynchronous motor) and wound rotor induction motor (the old standard called wound asynchronous motor).

Six, according to the speed of operation: high-speed motor, low-speed motor, constant-speed motor, speed-controlled motor.