Motor definition: refers to an electromagnetic device that realizes the conversion or transmission of electric energy according to the law of electromagnetic induction. Electric motors are also called motors (commonly known as motors) and are represented by the letter M in the circuit (the old standard uses D). Its main function is to generate driving torque as a power source for electrical appliances or various machinery. The motor described below is the definition of a small-power motor used in household appliances or electronic products: it refers to an electromagnetic device that realizes the conversion or transmission of electrical energy according to the law of electromagnetic induction. Electric motors are also called motors (commonly known as motors) and are represented by the letter 'M' in the circuit (the old standard uses 'D'). Its main function is to generate driving torque as a power source for electrical appliances or various machinery. The motors described below are low-power motors used in household appliances or electronic products, so-called micro motors. Types of motors 1. According to the working power source classification According to the different working power of the motor, it can be divided into DC motor and AC motor. Among them, AC motors are also divided into single-phase motors and three-phase motors. 2. Classified by structure and working principle Motors can be divided into DC motors, asynchronous motors and synchronous motors according to their structure and working principles. Synchronous motors can also be divided into permanent magnet synchronous motors, reluctance synchronous motors and hysteresis 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 shaded-pole asynchronous motors. AC commutator motors are divided into single-phase series motors, AC and DC dual-purpose motors and repulsion motors. 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 are divided into series-excited DC motors, shunt-excited DC motors, separately-excited DC motors and compound-excited DC motors. Permanent magnet DC motors are further divided into rare earth permanent magnet DC motors, ferrite permanent magnet DC motors and Alnico permanent magnet DC motors. 3. Classification according to starting and operating mode Motors can be divided into capacitor-starting single-phase asynchronous motors, capacitor-operating single-phase asynchronous motors, capacitor-starting operating single-phase asynchronous motors and split-phase single-phase asynchronous motors according to starting and operating modes. 4. Classification by use Motors can be divided into drive motors and control motors according to their uses. Driving motors are divided into electric tools (including drilling, polishing, polishing, slotting, cutting, reaming, etc.) motors, home appliances (including washing machines, electric fans, refrigerators, air conditioners, tape recorders, video recorders, and DVDs). Motors for machines, vacuum cleaners, cameras, hair dryers, electric shavers, etc.) and motors for other general small machinery equipment (including various small machine tools, small machinery, medical equipment, electronic instruments, etc.). Control motors are divided into stepping motors and servo motors. 5. According to the structure of the rotor, the motor can be divided into a cage induction motor (the old standard is called a squirrel cage asynchronous motor) and a wound rotor induction motor (the old standard is called a wound asynchronous motor) according to the structure of the rotor. 6. Classification by operating speed Motors can be classified into high-speed motors, low-speed motors, constant-speed motors, and speed-regulating motors according to their operating speed. Low-speed motors are divided into gear reduction motors, electromagnetic reduction motors, torque motors and claw-pole synchronous motors. In addition to stepped constant speed motors, stepless constant speed motors, stepped 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 switches Reluctance speed motor.
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