A novel three-phase flux-reversal permanent magnet machine with compensatory windings

Different from the conventional topology of flux-reversal permanent magnet (FRPM) machines, a novel 3-phase FRPM machine is proposed, which employs a special stator slots and rotor poles combination, resulting in the compensatory effect in the concentrated winding belonging to the same phase. The topology and operation principle of the proposed machine is presented firstly. Then, an optimization design considering the influences of airgap length and magnets thickness on the electromagnetic performance is investigated based on finite element analysis (FEA). The predicted results confirm that the proposed FRPM machines exhibit comparable electromagnetic performance with that of conventional FRPM machines.