What is a low-voltage AC three-phase asynchronous motor?

[Summary description] In motor operation of a three-phase asynchronous motor, three-phase asynchronous motor rotor speed is lower than the speed of the rotating magnetic field, rotor windings due to the existence of a relative motion with the magnetic field and generate electric potential and current, and interact with the magnetic field to produce electromagnetic torque, to realize the energy conversion.

Three-phase asynchronous motor running motor, three-phase asynchronous motor rotor speed is lower than the rotational speed of the rotating magnetic field, the rotor winding due to the existence of relative motion with the magnetic field generates electric potential and current and interacts with the magnetic field to generate electromagnetic torque, to realize the energy conversion.

　　Compared with single-phase asynchronous motor, three-phase asynchronous motor has good running performance and can save various materials. According to the difference in rotor structure, a three-phase asynchronous motor can be divided into cage type and wire-wound type. Cage-type rotor asynchronous motor structure is simple, reliable, lightweight, inexpensive, and has been widely used, and its main disadvantage is the speed regulation difficulties. The rotor and stator of a wire-wound three-phase asynchronous motor are also set up with three-phase windings and connected with external varistors through slip rings and brushes. Adjusting the varistor resistance can improve the starting performance of the motor and regulate the motor speed.