Consequent-pole Flux Reversal Machine With Asymmetric Pole Towards High Torque Density and Low Torque Ripple

Conventional flux reversal machine (FRM) suffers from significant pole flux leakage due to the direct mounting of permanent magnets (PM) under the stator teeth. In this paper, a novel consequent-pole FRM (AV-CPFRM) with asymmetric V-shaped PMs is proposed. The average torque of the proposed AV-CPFRM is enhanced by the flux focusing effect, and the torque ripple is reduced by adopting asymmetric structure. Then, the effect of asymmetric V-shaped magnets on the torque performance of the AV-CPFRM is investigated. Finally, the electromagnetic performance of the AV-CPFRM is compared with the conventional CP-FRM and consequent-pole FRM (V-CPFRM) with V-shaped PMs by the finite element analysis. The results indicate that the AV-CPFRM reduces torque ripple by 86.6% compared to the conventional CP-FRM while improving average torque by 11%.