Compensation Method of Position Estimation Error for High-Speed Surface-Mounted PMSM Drives Based on Robust Inductance Estimation

Yu Yao, Yunkai Huang, Fei Peng, Jianning Dong, Zichong Zhu

Research output: Contribution to journalArticleScientificpeer-review

Abstract

This paper proposes a compensation method of position estimation error for high-speed surface-mounted permanent magnet synchronous motors based on robust inductance estimation. The proposed method relies on the variation of the estimated -axis back-EMF when a small current is injected into the axis. The inductance estimation error is limited within 5% when the nominal resistance and inductance vary 30% of their real values. With the estimated inductance, the position estimation error can be well compensated. Compared with the conventional current-injection method, the proposed method has enhanced robustness against the system noises. Benefiting from this, it is effective to estimate the inductance with a small injected current (0.5% of the rated current), where the conventional methods fail. Finally, the effectiveness of the proposed method is validated by simulation and experiment results on a 100kr/min (1.67kHz) HSPMSM accurately with 10kHz sampling frequency.

Original languageEnglish
JournalIEEE Transactions on Power Electronics
DOIs
Publication statusAccepted/In press - 2021

Keywords

  • Estimation error
  • HSPMSM
  • Inductance
  • inductance identification
  • Observers
  • position estimation error
  • Resistance
  • Robustness
  • Rotors
  • small current injection
  • Synchronous motors

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