Investigation of New Dual-Stator Consequent-Pole Flux Reversal Permanent Magnet Arc Machines

This paper proposes two new dual-stator consequent-pole (CP) flux reversal permanent magnet (PM) arc machines (DS-CPFRPMAMs) for large telescope drives. The DS-CPFRPMAMs using CP PM arrangement can effectively reduce flux leakage and increase PM utilization. In addition, the space utilization and torque density of machine are significantly enhanced with the aid of dual-stator structure. The topologies and operation principles of DS-CPFRPMAMs are first described. Then, the design considerations of DS-CPFRPMAMs are analyzed. To reveal the merits of DS-CPFRPMAMs, the electromagnetic characteristics of two DS-CPFRPMAMs are comprehensively investigated and compared. The results indicate that compared to machine II, machine I accommodates lower cogging torque and better over-load torque capability. While, compared to machine I, machine II has higher back-EMF, torque density and PM utilization.