Design and Analysis of a New Dual-Stator Consequent-Pole Flux Reversal Machine With Triple-PM Excitation

This paper proposes a new dual-stator consequent-pole (CP) flux reversal machine with triple-PM excitation (T-DSCPFRPMM), in which the two stators and rotor are all incorporated with CP PM arrangement. The employment of triple-PM excitation is beneficial to enhance the flux densities in the inner and outer air-gaps. In addition, the ferromagnetic poles of rotor and stators are respectively used to modulate the magnetic field excited by stator-PM and rotor-PM, which introduces the bidirectional flux modulation effect into the proposed machine to enhance the torque production. The topology, operation principle and design consideration of the proposed T-DSCPFRPMM are analyzed, respectively. The electromagnetic performances of the proposed machine under stator-PM excitation only, rotor-PM excitation only and triple-PM excitation are evaluated and compared by finite element analysis. The predicted results show that by using triple-PM excitation, the proposed machine can offer the superior torque production with low torque ripple, excellent over-load torque capability, high efficiency and high power factor, which is desirable for direct-drive applications.