Induction motors, also known as "asynchronous motors," are devices that place the rotor in a rotating magnetic field and obtain a rotational torque under the action of the rotating magnetic field, thereby causing the rotor to rotate. The rotor is a rotatable conductor, usually in the shape of a squirrel cage. Invented by electrical engineer Nikola Tesla in 1887. The entry introduces the concept, inventor, working principle, basic structure, working mode, braking mode, asynchronous characteristics, specifications, and fault inspection of induction motors.

The rotor is a rotatable conductor, usually in the shape of a squirrel cage. The stator is the non rotating part of the motor, whose main task is to generate a rotating magnetic field. Rotating magnetic fields are not achieved by mechanical methods. Instead, alternating current is applied to a number of pairs of electromagnets, causing the properties of their magnetic poles to change cyclically, thus equivalent to a rotating magnetic field. This type of motor does not have a brush or collector ring like a DC motor. According to the type of AC power used, there are single-phase motors and three-phase motors. Single-phase motors are used for washing machines, electric fans, and so on; Three-phase motors are used as power equipment in factories.