I. Introduction
The advantages of hysteresis motors (HMs) such as self-starting property and structural integrity are diminished by their inability to deliver high output power/unit volume. This quantity is limited by physical value of energy product of the semihard magnetic alloys used in the hysteresis rotors. In addition, performance of HMs largely suffers from rotor harmonic losses [1]. Increasing energy density and so, the torque in HM can be realized by embedding permanent magnets in the rotor magnetic system [1], [2]. In this way, the machine benefits from the mutual torque between the stator winding mmf and flux of the magnets. In addition, an induction torque is generated in a solid hysteresis ring.