In this article, we propose a new scheme to use active flux on the q-axis for sensorless control of synchronous reluctance machines (SynRMs). Conventionally, “active flux” on the d-axis is adopted to convert a salient-pole machine into a fictitious nonsalient-pole machine. However, the injected d-axis flux can deteriorate high-frequency injection (HFI) sensorless control performance or even run the system into unstable region at low speed. This article demonstrates that active flux on the q-axis can support back EMF sensorless control at high speed and improve low-speed HFI performance substantially. A seamless transition from HFI sensorless method to back EMF voltage method is attained after adopting the proposed active q flux. The experimental results are used to validate the proposed method.

中文翻译：

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用于同步磁阻电机无传感器控制的主动 Q 磁通概念


在本文中，我们提出了一种新方案，利用 q 轴上的有源磁通对同步磁阻电机 (SynRM) 进行无传感器控制。传统上，采用d轴上的“有源磁通”将凸极电机转换为虚拟的隐极电机。然而，注入的 d 轴磁通会恶化高频注入（HFI）无传感器控制性能，甚至使系统在低速时进入不稳定区域。本文演示了 q 轴上的有源磁通可以支持高速反电动势无传感器控制，并大幅提高低速 HFI 性能。采用所提出的有源 q 磁通后，实现了从 HFI 无传感器方法到反电动势电压方法的无缝过渡。实验结果用于验证所提出的方法。