A Sliding-Mode Position Estimation Method with Chattering Suppression for LCL-Equipped High-Speed Surface-Mounted PMSM Drives

Yu Yao, Yunkai Huang, Fei Peng, Jianning Dong

Research output: Contribution to journalArticleScientificpeer-review

Abstract

This article proposes a sliding-mode position estimation method for high-speed surface-mounted permanent magnet synchronous machines with LCL filter. The implementation of the LCL filter aims at smoothing the motor current and reducing the iron loss caused by the harmonic currents. First, the discrete-time model of the LCL-filtered motor drive system is developed. Based on the developed model, the sliding-mode observer is proposed with more robustness against the parameter variation to estimate the back EMF, which contains the information of the rotor speed and position. Because of the elimination of the capacitor voltage sensors, the augmented sliding surface is designed to achieve arbitrary pole placement with only output feedback. Besides, considering the analog-to-digital scaling error and pulsewidth modulation harmonics, a reaching law with enhanced chattering suppression ability is proposed. Compared with the conventional methods, the chattering problem is well alleviated and thus the speed estimation ripple is much reduced. Finally, the effectiveness of the proposed method, even with the mismatched parameters adopted is validated at 100 kr/min with the sampling frequency 20 kHz.

Original languageEnglish
Article number9525338
Pages (from-to)2057-2071
Number of pages15
JournalIEEE Transactions on Power Electronics
Volume37
Issue number2
DOIs
Publication statusPublished - 2022

Bibliographical note

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care

Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

  • Chattering suppression
  • high-speed surface-mounted permanent magnet synchronous machine (HSPMSM)
  • LCL filter
  • rotor position
  • sliding-mode estimation
  • speed estimation ripple

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