Detrimental effect elimination of current sensor accuracy uncertainty for high-precision position sensorless control of interior permanent magnet synchronous motor drives

Jiadong Lu, Yihua Hu*, Jinglin Liu, Kai Ni, Huiqing Wen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

The precision of position estimation is highly dependent on the accuracy of multiple current sensors, whereas the conventional error calibration strategies for current sensor accuracy uncertainty (SAU) problem have limitations regarding the position sensorless controlled drives. In order to solve this thorny problem, this article proposes a mutual calibration strategy for the multiple current sensors in an interior permanent magnet synchronous motor (IPMSM) drive. The proposed current sensor error calibration strategy takes full advantage of the correlation among the multiple current sensors themselves without using any complicated observers. Moreover, the traditional seven-segment space vector pulsewidth modulation technology is applied without modification. The only change is reflected in several sets of the artificially added current sampling points. The effectiveness of the proposed strategy is verified by experimental results on a 5-kW IPMSM motor prototype, which shows that the calibrated current sensors exhibit improved accuracy, and the position estimation accuracy is also guaranteed.

Original languageEnglish
Article number8825997
Pages (from-to)6101-6111
Number of pages11
JournalIEEE Transactions on Industrial Electronics
Volume67
Issue number7
DOIs
Publication statusPublished - Jul 2020

Keywords

  • Current sampling error
  • estimation error
  • interior permanent magnet synchronous motor (IPMSM)
  • mutual calibration
  • position sensorless control

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