1. Classified by type of working power supply: It can be divided into DC motors and AC motors.
1) DC motors can be divided into brushless DC motors and brushed DC motors according to their structure and working principle.
Brush DC motors can be divided into permanent magnet DC motors and electromagnetic DC motors.
Classification of electromagnetic DC motors: series-excited DC motor, shunt-excited DC motor, separately-excited DC motor, and compound-excited DC motor.
Classification of permanent magnet DC motors: rare earth permanent magnet DC motors, ferrite permanent magnet DC motors, and alnico permanent magnet DC motors.
2) Among them, AC motors can also be divided into single-phase motors and three-phase motors.
2. According to their structure and working principles, they can be divided into: DC motors, induction motors, and synchronous motors.
1) Synchronous motors can be divided into: permanent magnet synchronous motors, reluctance synchronous motors, and hysteresis synchronous motors.
2) Asynchronous motors can be divided into induction motors and AC commutator motors.
Induction motors can be classified into three-phase induction motors, single-phase induction motors, shaded-pole induction motors, etc.
AC commutator motors can be divided into: single-phase series excitation motors, AC/DC dual-purpose motors, and repulsion motors.
3. According to the starting and operating modes, they can be divided into: capacitor-starting single-phase induction motors, capacitor-operating single-phase induction motors, capacitor-starting and operating single-phase induction motors, and split-phase single-phase induction motors.
4. According to their purposes, they can be divided into driving motors and control motors.
1) Driving motors can be divided into: motors for electric tools (including drilling, polishing, grinding, slotting, cutting, reaming, etc.), motors for household appliances (including washing machines, electric fans, refrigerators, air conditioners, recorders, video recorders, DVD players, vacuum cleaners, cameras, hair dryers, electric shavers, etc.), and motors for other general-purpose small mechanical equipment (including various small machine tools, small machinery, medical equipment, electronic instruments, etc.).
2) Control motors can be further divided into stepping motors, servo motors, etc.
5. According to the structure of the rotor, induction motors can be divided into cage induction motors (referred to as squirrel-cage induction motors in the old standard) and wound-rotor induction motors (referred to as wound-rotor induction motors in the old standard).
6. According to the operating speed, they can be divided into: high-speed motors, low-speed motors, constant-speed motors, and variable-speed motors. Low-speed motors are further divided into gear reduction motors, electromagnetic reduction motors, torque motors, claw-pole synchronous motors, etc.
In addition to being classified into step constant speed motors, stepless constant speed motors, step variable speed motors, and stepless variable speed motors, speed-regulating motors can also be divided into electromagnetic speed-regulating motors, DC speed-regulating motors, PWM variable frequency speed-regulating motors, and switched reluctance speed-regulating motors.
The rotor speed of an asynchronous motor is always slightly lower than the synchronous speed of the rotating magnetic field.
The rotor speed of a synchronous motor remains constant at the synchronous speed, regardless of the load.
Post time: Nov-17-2025