The motor principle of the electric printer is: 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: the use of appropriate magnetic and conductive materials constitute mutual electromagnetic induction of magnetic circuit and circuit, in order to produce electromagnetic power, to achieve the purpose of energy conversion. Three-phase induction motor is induction motor, stator current, part of the flux through the short circuit ring, and in which the induction current. The current in the short-circuit ring blocks the change of magnetic flux, resulting in a phase difference between the part with short-circuit ring and the part without short-circuit ring, thus forming a rotating magnetic field. After the start of electricity, the rotor winding due to the presence of a relative motion between the magnetic field and the electromotive force and current, that is, the rotating magnetic field and the rotor have a relative speed, and interact with the magnetic field to produce electromagnetic torque, so that the rotor up to achieve energy conversion.
Classification of the motor: according to the classification of the working power supply of the motor, can be divided into DC motor and AC motor. The AC motor is also divided into single-phase motor and three-phase motor.
