Basic knowledge of the motor

Update:05 Jul 2019
Summary:

The working principle of the motor: There are many form […]

The working principle of the motor: There are many forms of the motor, but its working principle is based on the law of electromagnetic induction and the law of electromagnetic force. Therefore, the general principle of its construction is to construct magnetic circuits and circuits that mutually electromagnetically sense with appropriate magnetically conductive and conductive materials to generate electromagnetic power for energy conversion purposes. The three-phase asynchronous motor is an induction motor. After the stator is energized, part of the magnetic flux passes through the short-circuit ring and generates an induced current therein.

The current in the shorting ring impedes the change in the magnetic flux, causing a phase difference between the shorted loop portion and the magnetic flux generated without the shorting loop portion, thereby forming a rotating magnetic field. After the power is turned on, the rotor winding induces electromotive force and current due to the relative motion between the magnetic field and the magnetic field. That is, the rotating magnetic field and the rotor have relative rotational speed, and interact with the magnetic field to generate electromagnetic torque, which turns the rotor and realizes energy conversion.