Theoretical analysis shows that a r

Theoretical analysis shows that a rotating magnetic field, if the stator winding is a symmetrical three-phase symmetrical three-phase voltage applied, there is a symmetrical three-phase current flows, and will form a magnetic field rotating in the air gap of the motor, the rotational speed of the magnetic field n1 is called synchronous speed, the motor of the magnetic pole frequencies f1 and its relationship to the grid of the number p is: n1 = 60 f1 / p phase sequence and steering arrangement of three-phase windings and three-phase currents related figures U, V , W-phase are arranged in the clockwise direction, when the three-phase current stator winding Walter U, V, W phase sequence stator a rotating magnetic field is turned clockwise. Since the rotor is stationary, there is between the rotor and the rotating magnetic field relative motion, because the rotor conductor cutting magnetic field generates an induced electromotive force of the stator, the rotor windings due to their closed, there will be current flowing within the rotor winding. Active rotor current and rotor phase induced electromotive force, whose direction can be "right-hand generator set is" OK. The active component of the current carrying rotor winding of a rotating magnetic field in the stator, the electromagnetic force F, which direction from "left motive given is" OK. An electromagnetic force to form a magnetic torque shaft, which is consistent with the direction of action of the rotating field direction, dragging along the rotational direction of the rotating magnetic field of the rotor rotates, the input electrical energy into rotational mechanical energy. If the motor shaft with a mechanical load, the mechanical load is rotated with the rotation of the motor, the motor load of the mechanical work done.