A Brushless Three-phase Synchronous Induction Motor with Two Stators

In this paper, a brushless three-phase synchronous induction motor with two stators which can self-start as a wound-rotor induction motor without external secondary resistance is proposed. In the proposed motor, two excitation schemes, separately and self-ones, can be realized. In the separately excitation scheme, the proposed machine can operate as a synchronous generator-motor. The proposed machine compared with traditional brushless synchronous motor with AC exciter has the following advantages : the rotor structure is simple and robust, the operating reliability is high, and the high starting torque is realized