A difficult problem of a high-resistance (HR) connection for permanent magnet synchronous motor (PMSM) drives is investigated in this article. The presence of HR affects stator currents in such a way to deviate from their reference currents in the vector-control structure of the drive, which degrades the performance, reliability, and efficiency of the system. Unlike existing schemes, which are limited to detection of the HR connection, in this article, a current-control scheme based on a higher order sliding mode is designed to not only detect, but also provide fault-tolerant control simultaneously. The HR connection control is obtained by canceling extra dynamics (which are generated due to the HR connection) in the considered PMSM current model, which provides accurate tracking of actual current dynamics (d,q) to the reference currents. Moreover, the HR is also estimated from the robust sliding-mode control terms to monitor the asymmetry in the faulted phase. Simulation and experimental results on a three-phase laboratory test PMSM confirm the validity of the proposed scheme for various cases of stator phase resistances.

中文翻译：

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永磁同步电动机的高阻故障控制

本文研究了永磁同步电动机（PMSM）驱动器的高电阻（HR）连接的难题。HR的存在会以某种方式影响定子电流，从而使其偏离驱动器矢量控制结构中的参考电流，从而降低了系统的性能，可靠性和效率。与仅限于HR连接检测的现有方案不同，本文将基于高阶滑模的电流控制方案设计为不仅可以检测，而且可以同时提供容错控制。通过消除所考虑的PMSM电流模型中的多余动态（由于HR连接而产生）来获得HR连接控制，从而可以准确跟踪实际电流动态（d，q）到参考电流。此外，还从鲁棒滑模控制项估算HR，以监视故障阶段的不对称性。在三相实验室测试PMSM上进行的仿真和实验结果证实了该方案在各种定子相电阻情况下的有效性。