Abstract

To improve the efficiency of sensorless interior permanent magnet synchronous motor (IPMSM) drives, a simultaneous maximum torque per ampere (MTPA) and sensorless control strategy for IPMSM drives based on high-frequency (HF) signal injection is proposed. This method can avoid HF signals mutual interference by making full use of the d-q axis HF current response and tracking MTPA point with qaxis virtual signal injection. The experiments on the 2.2-kW IPMSM platform verify the proposed method can realize sensorless control and MTPA control simultaneously at low-speed region.

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