三相异步电念头扭转道理(国外英语资料).docVIP

三相异步电动机旋转原理(国外英语资料) The working principle of three phase asynchronous motor Introduction: the resultant magnetic field produced by a three-phase current through a stator winding is a magnetic field rotating in space in response to alternating current. The rotating magnetic field acts the same as the horseshoe magnet in spatial rotation. Key words: three-phase asynchronous motor, working principle I. rotation principle of squirrel cage rotor The three-phase asynchronous motor is operated by rotating magnetic field, and its working principle can be understood intuitively through the following demonstration experiments. A handle is arranged on the hoof shaped magnet shaft seat O1 support free rotation; in the horseshoe has a squirrel cage rotor magnet pole two, squirrel cage rotor shaft seat with O2 support free rotation shaft seat and a shaft seat; O1 O2 on the same axis. There is no friction and mechanical linkage between the horseshoe magnet and the squirrel cage rotor, and each of the two can rotate independently or remain stationary. When the rocking handle magnet rotates clockwise, the magnetic field magnetic line cutting copper cage rotor on the rotor copper bar, equivalent to the counter clockwise magnetic line cutting, closed copper bar will produce induced current, the direction can be the right hand dingze judge. Because of the induced current in the magnet in the magnetic field, so the copper strip subjected to magnetic field force F and the rotation of the rotor, the direction of magnetic force F can be determined according to the left, from the judging result consistent with the direction of rotation of the rotor magnet rotation direction. The handle moves fast, the rotor turns fast, the handle moves slowly, and the rotor rotates slowly. Similarly, when the shoe magnet rotates counter clockwise, the rotor rotates counter clockwise. In the demonstration process, is composed of a hoof shaped rotating magnetic field produces a rotating magnet that squirrel