AC motor principle
AC motor is divided into synchronous and asynchronous motors. Synchronization is mainly used as generator. Asynchronous is mainly motor. This mainly introduces the motor. Because of its simple structure, low price, convenient maintenance and reliable operation, the asynchronous motor has been widely used. Although the AC motor has a simple structure, the working principle is actually more complicated than that of the DC motor.
A three-phase symmetrical alternating current is applied to the stator of the alternating current motor, and the stator is stationary. Only a change in current can produce a rotating synthetic magnetic field, which acts like a magnet that rotates around the stator. With this rotating magnet, a closed coil is placed inside the stator, and an electromotive force and current are induced in the closed coil, and an electromagnetic force is generated, and the closed coil is rotated. It can also be understood that there is a selected magnet on the stator. The rotor closed coil is actually an electromagnet due to induction charging. When the outer electromagnet is rotating, it will turn with the electromagnet inside, so the AC motor The rotor turned.
The rotational speed of the stator magnetic field is also called synchronous speed. The inner rotor is actually driven by the stator magnetic field, so his speed will be slower than the stator magnetic field, so it is called asynchronous speed.
