This paper proposes a new phase current reconstruction scheme without using null switching states for interior permanent magnet synchronous motor (IPMSM) sensorless control. The phase currents are independently reconstructed and no additional test voltage pulses are required. First, the principle of the basic phase current reconstruction for IPMSM drive system is analyzed in detail. Then, an independent phase current reconstruction scheme without using null switching states is proposed. The current reconstruction dead zone is divided into six sectors, and each sector is split into three parts with corresponding vector synthesis methods. Meanwhile, the null switching states, V000 and V111, are removed from the proposed scheme. In this case, the zero vector is synthesized by the other available vectors. Finally, the reconstructed threephase currents are utilized for high frequency sine-wave voltage injection-based position estimation. The effectiveness of the proposed scheme is verified by experimental results on a 5 kW IPMSM motor prototype, which shows that the reconstructed phase currents track the actual currents accurately under different working conditions.

中文翻译：

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不使用空开关状态的 IPMSM 无传感器控制的独立相电流重构策略


本文提出了一种新的不使用零开关状态的相电流重构方案，用于内置式永磁同步电机（IPMSM）无传感器控制。相电流独立重建，不需要额外的测试电压脉冲。首先，详细分析了IPMSM驱动系统基本相电流重构的原理。然后，提出了一种不使用零开关状态的独立相电流重构方案。目前的重建死区分为六个扇区，每个扇区又分为三个部分，并有相应的矢量合成方法。同时，零开关状态 V000 和 V111 从提议的方案中删除。在这种情况下，零向量由其他可用向量合成。最后，重建的三相电流用于基于高频正弦波电压注入的位置估计。在5 kW IPMSM电机样机上的实验结果验证了该方案的有效性，表明重构的相电流在不同工况下都能准确跟踪实际电流。