Y series three-phase asynchronous motor is an electric motor, a motor mechanical and electrical energy into mechanical energy. AC induction motor is a motor, the frequency of the load than the speed of their connection with the power grid is not constant relationship. Changes also occur with the size of the load. The load torque, the lower the rotor speed. Asynchronous motors include induction motor, double-fed asynchronous motor and AC commutator motors. The most widely used induction motor, without misleading or confusing, and can be called for induction motor induction motor.