AC asynchronous motor is a leading AC voltage operating motor, widely used in electric fans, refrigerators, washing machines, air conditioners, hair dryers, vacuum cleaners, lampblack machines, dishwashers, electric sewing machines, food processing machines and other household appliances and a variety of electric tools, small electromechanical equipment.
AC asynchronous motor is divided into induction motor and AC commutator motor. Induction motor is divided into single-phase asynchronous motor, AC and DC dual-purpose motor and push-repulsion motor.
The rotational speed of the motor (rotor speed) is less than that of the rotational magnetic field, which is called an asynchronous motor. It is basically the same as the induction motor.
1, when three-phase asynchronous motor is connected to three-phase AC power supply, the tri-phase stator winding flows through the third-phase magnetic potential (stator rotating magnetic potential) generated by the triple relative current and produces a rotating magnetic field.
2, the rotating magnetic field and the rotor conductor have a relative cutting motion, according to the principle of electromagnetic induction, the rotor conductor generates induction electromotive force and generate induced current.
3, according to the law of electromagnetic force, the rotor conductor of carrying current is subjected to electromagnetic force in the magnetic field, which forms the electro-magnetic torque, drives the rotor to rotate, and when the motor shaft is loaded with mechanical load, the mechanical energy is output outward.