Analysis of Double Flux Modulation Flux Reversal Machines with Different Consequent-Pole PM Topologies

In this paper, two novel double flux modulation flux reversal machines (DFM-FRMs) with two PM pieces and two ferromagnetic iron poles on each stator tooth are proposed. Together with two conventional DFM-FRMs, four types of DFM-FRMs with different consequent-pole PM topologies are comprehensively investigated and compared. The working harmonics and the dominating harmonics that contribute to torque production of four DFM-FRMs are analyzed. Aiming at maximum torque, four machines are globally optimized and their electromagnetic performances in terms of no-load, on-load and over-load capabilities are evaluated and compared using finite element (FE) method. A prototype is under built and the experimental results will be shown in future publications.