三相异步电机（Three-phase asynchronous motor）.doc

三相异步电机（Three-phase asynchronous motor） [edit this paragraph] work principle There are many forms of motors, but their working principles are based on the law of electromagnetic induction and the laws of electromagnetic force. Therefore, the general principle of its construction is that the magnetic circuit and circuit of electromagnetic induction are formed by proper magnetic conductive material and conductive material to produce electromagnetic power, so as to achieve the purpose of energy conversion. The three-phase induction motor is an induction motor. After the stator has passed in the current, some of the flux passes through the short loop and induces an induced current in it. The current in the short circuit ring hinders the change of the magnetic flux, resulting in a phase difference between the short circuit ring portion and the magnetic flux produced by the short circuited ring portion, thereby forming a rotating magnetic field. After power up, the rotor winding magnetic field between the relative motion and the induced electromotive force and current, the rotating magnetic field and rotor relative speed, and electromagnetic torque and magnetic field interaction, the rotor turn up, to achieve energy transformation. [classification] classification of motors 1. classification by work power According to the different power supply of the motor, it can be divided into direct current motor and AC motor. Among them, AC motor is divided into single-phase motor and three-phase motor. 2. classification according to the structure and working principle According to the structure and working principle of the motor, it can be divided into direct current motor, asynchronous motor and synchronous motor. Synchronous motors can also be divided into permanent magnet synchronous motor, reluctance synchronous motor and hysteresis synchronous motor. Induction motors can be divided into induction motors and AC commutator motors. The induction motor is divided into three phase as