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<p>The conventional sensorless control of permanent magnet synchronous motor (PMSM) based on the sliding mode observer (SMO) and the quadrature phase-locked loop (QPLL) is widely used. A method using the finite-position-set phase-locked loop (FPS-PLL) to replace the QPLL has been proposed due to its good dynamic response without the need for parameter adjustment. However, the anti-harmonic capacity of the FPS-PLL is poor, which results in harmonic effects on the estimated rotor position. In this article, the estimated error caused by the FPS-PLL is theoretically analyzed and a second-order generalized integrator (SOGI) based FPS-PLL is studied. In addition, the chattering problem present in the conventional first-order SMO is improved. The effectiveness of this method is validated through experimental results.</p>

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SOGI based finite position set-phase locked loop for sensorless control of PMSMs

  • 期刊论文

  • 发表日期：

    2025年5月9日

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  • Xiang Wu,
  • Boliang Wu,
  • Jieguang Li,
  • Shanjun Lu,
  • Chao Li,
  • Jia Li,
  • Haifeng Yue,
  • Xiao Zhang

摘要

The conventional sensorless control of permanent magnet synchronous motor (PMSM) based on the sliding mode observer (SMO) and the quadrature phase-locked loop (QPLL) is widely used. A method using the finite-position-set phase-locked loop (FPS-PLL) to replace the QPLL has been proposed due to its good dynamic response without the need for parameter adjustment. However, the anti-harmonic capacity of the FPS-PLL is poor, which results in harmonic effects on the estimated rotor position. In this article, the estimated error caused by the FPS-PLL is theoretically analyzed and a second-order generalized integrator (SOGI) based FPS-PLL is studied. In addition, the chattering problem present in the conventional first-order SMO is improved. The effectiveness of this method is validated through experimental results.