Classification of electric motors

Principle of operation of electric motors: electric motors are in the form of, but its principle of operation is based on the law of electromagnetic induction and electromagnetic force law. Therefore, the general principle of configuration: with appropriate magnetic and conductive materials constitute the magnetic circuit and circuit to generate electromagnetic power to achieve the purpose of energy conversion of electromagnetic induction with each other. The stator of a three-phase induction motor passes current through a short-circuit loop of magnetic flux and induces a current in it. The current in the short-circuit ring impedes the change in magnetic flux, which results in a phase difference in the magnetic flux generated by the short-circuit ring portion of the short-circuit ring portion, resulting in the formation of a rotating magnetic field. Upon energization, the rotor windings have induced relative motion of the magnetic field between the electromotive force and the current, the relative speed of the rotating magnetic field in the rotor, and the interaction with the magnetic field produces the electromagnetic torque, the energy conversion of the rotor.

The motor is a motor with a rotating magnetic field.

Motor classification:

Operating power source classification according to the power of the motor, can be divided into DC motor and AC motor. In which AC motors are also divided into single-phase motors and three-phase motors.

2.

Classification of structure and working principle DC motors, asynchronous and synchronous motors, can be classified according to the structure and working principle of different motors.

Synchronous motors with permanent magnets synchronous motors, synchronous motors with synchronous reluctance motors and hysteresis can be divided into. /> asynchronous motors can be divided into induction motors and ac commutator motors. Induction motors that are divided into three-phase asynchronous motors, single-phase asynchronous motors and shaded-pole induction motors. AC commutator motors are further divided into single-phase series-excited motors, AC and DC motors and rejection motors.

dc motor structure and working principle dc brushless motor and brush dc motor, can be divided into. Brushed dc motors can be divided into permanent magnet dc motors and electromagnetic dc motors. Electromagnetic dc motor is divided into a series of wound dc motor, he excitation dc motor he excitation dc motor and compound excitation dc motor. Permanent magnet DC motors are divided into rare earth permanent magnet DC motors, ferrite permanent magnet DC motors and alnico permanent magnet DC motors.

5. According to the starting and running of the motor, it can be divided into single-phase capacitor starting asynchronous motor, capacitor running single-phase asynchronous motor, capacitor starting and running single-phase asynchronous motor and single-phase split-phase asynchronous motor starting and in running.

. 6. according to the use of classification can be divided into drive motor and control motor.

Drive motor power tools (including drilling, sanding, polishing, slotting, cutting, reaming tools) are divided into motors, household appliances (including washing machines, electric fans, refrigerators, air conditioners, tape recorders, video recorders, DVD players, vacuum cleaners, cameras, hairdryers, electric shavers, etc.) motors and electric motors and other general-purpose small machinery and equipment (including a variety of small tools, small machines, medical equipment, electronic equipment, etc.). medical equipment, electronic equipment, etc.).

Stepping motor and servo motor control motor is divided into.

7. motor rotor structure of the rotor structure classification, can be divided into squirrel cage induction motor (the old standard known as squirrel cage induction motor) and wire-wound asynchronous motor (the old standard known as wire-wound asynchronous motor).

8. According to the operating speed of the motor, the operating speed can be divided into high-speed motors, low-speed motors, fixed-speed motors, frequency control motors.

Divided into low-speed motors electromagnetic gear motors, motors, torque motors and claw pole synchronous motors. Step constant speed motor can be divided into /> speed motor, stepless variable speed motor and stepless variable speed motor constant speed motor, can be divided into electromagnetic speed motor, DC motor, PWM inverter speed motor, switched reluctance motor. /> Rotor induction motors always rotate at a speed slightly lower than the synchronous speed of the rotating magnetic field.

Synchronous motor rotor speed is independent of the load and always maintains a synchronized speed.