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Flux reversal machines (FRMs) have received extensive attentions in recent years due to their high torque densities, robust structures, fast transient responses, etc. This paper focuses on the analysis of the torque performances including average torque, cogging torque, and ripple torque of three-phase FRMs. First, the general expressions of instantaneous torque under no-load and rated-load conditions...
In this paper, a novel flux reversal machine (FRM) is proposed to achieve a larger torque density and a smoother torque waveform than the conventional FRM. The proposed FRM have the same combinations of stator and rotor slots, winding pole pair and PM usage, but different PM arrangement with the conventional FRM, i.e. in the conventional FRM, a pair of PMs is mounted on the surface of each stator...
Flux reversal machines (FRMs) have a great potential in the field of electric vehicle (EV) propulsion due to their high torque density, robust structure, fast response, etc. This paper focuses on the analysis of the torque performances including average torque, cogging torque and ripple torque of three-phase FRMs. First, the general expressions of instantaneous torque and pulsating torque are analytically...
The conventional three-phase flux reversal machines (FRMs) are with integer slot windings (ISWs) and the most significant drawback is large cogging torque. This paper proposes several slot-pole combinations of FRMs with fractional slot windings (FSWs), taking advantage of the FSW with low cogging torque. First, the general rules for the determination of the FSW pole pair are introduced, and the feasible...
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