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<p>High-frequency (HF) voltage injection is widely used in initial position detection (IPD) for surface-mounted permanent magnet synchronous motor (SPMSM). However, conventional IPD strategy for SPMSM is susceptible to <i>q</i>-axis inductance mismatch and also suffers from the unknown <i>d</i>-axis inductance caused by magnetic saturation. Therefore, a robust IPD strategy by adaptive super-twisting observer with audible noise reduction is proposed in this paper. Firstly, through normalization of current response with delay compensation, rotor position observation without inductance parameter is achieved to enhance the robustness. Secondly, adaptive super-twisting observer (ASTO) is used to achieve faster convergence speed as well as lower chattering. Finally, in order to reduce audible noise caused by HF voltage injection, variable frequency (VF) voltage injection method is proposed to disperse the distribution of current power spectral density (PSD), thus decreasing the peak value of PSD to reduce the shrill audible noise.</p>

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Robust initial position detection for SPMSM drive based on adaptive super-twisting observer with audible noise reduction

  • 期刊论文

  • 发表日期：

    2025年3月18日

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  • Huanli Liu,
  • Dayu Luo,
  • Weiyang Lin,
  • Zhitai Liu

摘要

High-frequency (HF) voltage injection is widely used in initial position detection (IPD) for surface-mounted permanent magnet synchronous motor (SPMSM). However, conventional IPD strategy for SPMSM is susceptible to q-axis inductance mismatch and also suffers from the unknown d-axis inductance caused by magnetic saturation. Therefore, a robust IPD strategy by adaptive super-twisting observer with audible noise reduction is proposed in this paper. Firstly, through normalization of current response with delay compensation, rotor position observation without inductance parameter is achieved to enhance the robustness. Secondly, adaptive super-twisting observer (ASTO) is used to achieve faster convergence speed as well as lower chattering. Finally, in order to reduce audible noise caused by HF voltage injection, variable frequency (VF) voltage injection method is proposed to disperse the distribution of current power spectral density (PSD), thus decreasing the peak value of PSD to reduce the shrill audible noise.