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Axially Stacked Multiphase Flux Reversal Machine

This paper introduces a novel three-phase flux reversal machine. Unlike conventional machines, the proposed machine is based on a multi-layered design with three magnetically independent rotors and stators on the same shaft. Each layer represents a single-phase flux reversal machine (FRM), which is mechanically shifted against each other. Each layer consists of a stator with two teeth, where two magnets of opposite polarity are radially attached to each tooth. The salient rotor consists of three poles, which are located 120° apart. This multilayered structure compensates for shortcomings of the single-phase FRM like high torque pulsations and vanishing starting torque at specific rotor positions. These advantages of the three-phase machine will be supported through various analyses, comparisons and simulations presented in this paper.