科研之友
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摘要
To adapt to the single power supply system of the aircraft, this study proposes and investigates a novel fault-tolerant drive system based on the redundancy bridge arm for aerospace applications. The proposed fault-tolerant drive system adopts a dual-winding fault-tolerant (DF) motor; the DF motor offers the advantages of magnetic isolation, physical isolation, thermal isolation, small cogging torque ripple, inhibiting the short-circuit current and high fault tolerance. The proposed fault-tolerant drive can adapt to the single power supply system of the aircraft, reduce the drive cost, and cut down the number of independent power sources and power switches. In addition, it can improve the power density, reliability, and the utilisation rate of the drive system. To realise the open-circuit fault diagnosis performance, the diagnosis and processing method of the open-circuit fault has been investigated. Then, to realise the fault-tolerant performance, a novel space-vector pulse-width modulation (SVPWM) fault-tolerant control strategy is proposed. Finally, the performances of the fault-tolerant drive have been verified by simulations and experiments. The research results verify the reliability and effectiveness of the proposed fault-tolerant drive system based on the redundancy bridge arm and SVPWM fault-tolerant control strategy.
