Field Orientation Control for a Dual Winding Dual Magnet Flux Modulated Machine With Torque Distribution Capability

This article focuses on modeling, and field orientation control (FOC) for a novel stator/rotor dual PM and dual winding flux modulated machine (DWDM). The special characteristic of the machine is that both the stator and rotor have PMs and windings. The relative position of two windings changes during machine operation. The particular structure enables it to generate multiple torque components, which improves the torque density and fault tolerance. It's necessary to establish accurate modeling and study the suitable control strategy for the novel machine. This article first illustrates the machine's topology and the generation principle of multiple torque components. Then the mathematical model of the machine considering torque and electromagnetic coupling is fully studied. The special relationship between the initial position and the mathematical model in the
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frame is revealed. Afterward, the field orientation control (FOC)method and torque distribution strategy are investigated. Finally, simulation and experiment are carried out to verify the feasibility of the proposed method. The experiments have effectively completed the torque distribution and current independent control, showing the ability of the machine to operate in different modes.