A Dual-Winding Fault-Tolerant Motor Drive System Based on the Redundancy Bridge Arm

In order to adapt to the single power supply system of an aircraft, this paper proposes and investigates a novel dual-winding fault-tolerant (DF) motor drive system based on the redundancy bridge arm for aerospace applications. The proposed DF motor offers the advantages of magnetic isolation, physics isolation, thermal isolation, and small cogging torque ripple, inhibiting the short-circuit current and high fault tolerance. The proposed DF motor drive can adapt to the single power supply system of the aircraft, reduce the drive cost, and reduce the number of independent power sources and power switches. In addition, it can improve the power density, the reliability, and the utilization rate of the drive. At the same time, the drive system has stronger fault-tolerant ability, and it can achieve the fault-tolerant control for a one-phase-winding fault or a multiphase-winding fault. To realize the short-circuit fault diagnosis performance, the diagnosis and processing method of the short-circuit fault has been investigated. Then, to realize the short-circuit fault-tolerant performance, a novel space vector pulsewidth modulation (SVPWM) fault-tolerant control strategy based on the short-circuit fault diagnosis and processing method is proposed. Finally, the performances of the DF motor drive have been verified by experiments. The research results verify the reliability and effectiveness of the proposed DF motor drive system based on the redundancy bridge arm and the SVPWM fault-tolerant control strategy.

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