Journal of Power Electronics

  • 제22권5호
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  • Pages.784-795
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  • 2022
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  • 1598-2092(pISSN)
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  • 2093-4718(eISSN)
전력전자학회 (The Korean Institute of Power Electronics)
권호 표지
DOI QR코드

DOI QR Code

High-frequency response current direct demodulation method for sensorless control of interior permanent magnet synchronous motor drives

  • Li, Wenzhen (School of Automation, Northwestern Polytechnical University) ;
  • Liu, Jinglin (School of Automation, Northwestern Polytechnical University) ;
  • Gong, Chao (Department of Electronic Engineering, University of York)
  • 투고 : 2021.10.07
  • 심사 : 2022.02.07
  • 발행 : 2022.05.20
⟨ 이전 논문 다음 논문 ⟩

초록

Sensorless schemes are mainly used in fault-tolerant control of interior permanent magnet synchronous motor (IPMSM) drives. Traditional sensorless methods with injection of high-frequency (HF) carrier signals into the stationary reference frame have a stable performance. However, phase shifts caused by conventional high-pass filters (HPFs) decrease the estimation accuracy. Besides, the demodulation process is usually complicated, which increases the difficulty of application. To solve these problems, this study presents an HF-induced current direct demodulation method. Rotor position angle can be solved from the sampled currents at adjacent moments without demodulation signals. Therefore, the errors related to filters in the rotor position estimation are eliminated. Besides, the efficiency of the demodulation algorithm is improved. Furthermore, an online compensation method for cross-saturation effect is proposed. Experimental results verify that the proposed strategy can obtain an accurate rotor position with good steady-state and dynamic performance.

키워드

참고문헌

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