According to the classification of working power supply, according to the different working power supply of motor, it can be divided into DC motor and AC motor. Among them, AC motors are divided into single-phase motors and three-phase motors. 2. Classification of motors according to structure and working principle Motors can be divided into DC motors, asynchronous motors and synchronous motors according to structure and working principle. Synchronous motors can also be divided into permanent magnet synchronous motors, reluctance synchronous motors and hysteresis synchronous motors. Asynchronous motors can be divided into induction motors and AC commutator motors. Induction motors are divided into three-phase asynchronous motors, single-phase asynchronous motors and shielded pole asynchronous motors. AC commutator motor is divided into single-phase series motor, AC -DC dual-purpose motor and repulsion motor. According to the structure and working principle, DC motors can be divided into brushless DC motors and brushed DC motors. Brushed DC motors can be divided into permanent magnet DC motors and electromagnetic DC motors. Electromagnetic DC motors can be divided into series DC motors, parallel DC motors, separately excited DC motors and composite DC motors. Permanent magnet DC motors are divided into rare earth permanent magnet DC motors, ferrite permanent magnet DC motors and Al-Ni-Co permanent magnet DC motors. 3. Classification of motors according to starting and running modes Motors can be divided into capacitor-started single-phase asynchronous motors, capacitor-operated single-phase asynchronous motors, capacitor-started single-phase asynchronous motors and split-phase single-phase asynchronous motors according to starting and running modes. 4. Motors can be classified into drive motors and control motors according to their uses. The driving motor is divided into electric tools (including drilling, grinding, polishing, slotting, cutting, reaming and other tools) and household appliances (including washing machines, electric fans, refrigerators, air conditioners, tape recorders, video recorders, DVD players, vacuum cleaners, cameras, hair dryers, electric shavers and so on). ) and other general small mechanical equipment (including all kinds of small machine tools, small machinery, medical instruments and electronic instruments).
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