Switched reluctance machines (SRMs) are known for their simple and robust mechanical design, low magnetic pole, and phase coupling as well as low short-circuit current and open-circuit voltage during a fault condition. These advantages make the SRM a suitable candidate for applications, which requires high-reliability and fault-tolerant operation. This article addresses the challenge of minimizing the unbalanced magnetic pull (UMP) caused during a single-pole failure, which is the most common electrical fault found in SRMs. In fault-tolerant SRMs, usually, the entire faulty phase is turned off to continue operation. To minimize the loss of torque production during a fault, a distributed inverter (one inverter module per coil) is introduced enabling the SRM to continue operation with all remaining healthy poles. Furthermore, a fault-tolerant control strategy utilizing the advantages of the distributed inverter, namely, radial force minimization control (RFMC), is proposed. This control allows a considerable reduction in the UMP while maintaining constant torque control during faulty operation. A four-phase 1-kW 16/12 SRM with a distributed inverter is used to present the theoretical approach and simulation results of the proposed control algorithm. Furthermore, experimental measurement results for the RFMC are shown to validate the effectiveness of the introduced algorithm.

中文翻译：

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分布式逆变器容错开关磁阻电机的径向力最小化控制

开关磁阻电机（SRM）以简单可靠的机械设计，低磁极和相位耦合以及故障情况下的低短路电流和开路电压而著称。这些优势使SRM成为需要高可靠性和容错操作的应用的合适候选者。本文解决了将单极故障（这是SRM中最常见的电气故障）引起的不平衡磁拉（UMP）降至最低的挑战。通常，在容错SRM中，整个故障阶段都将关闭以继续运行。为了最大程度地减少故障期间产生的扭矩损失，引入了分布式逆变器（每个线圈一个逆变器模块），使SRM可以在所有其余健康极点下继续运行。此外，提出了一种利用分布式逆变器优势的容错控制策略，即径向力最小化控制（RFMC）。该控制可在故障操作期间保持恒定转矩控制的同时，大幅降低UMP。使用带有分布式逆变器的四相1kW 16/12 SRM来介绍所提出的控制算法的理论方法和仿真结果。此外，RFMC的实验测量结果证明了所引入算法的有效性。使用带有分布式逆变器的四相1kW 16/12 SRM来介绍所提出的控制算法的理论方法和仿真结果。此外，RFMC的实验测量结果显示出可以验证所引入算法的有效性。使用带有分布式逆变器的四相1kW 16/12 SRM来介绍所提出的控制算法的理论方法和仿真结果。此外，RFMC的实验测量结果显示出可以验证所引入算法的有效性。