Precise Cumulative Error Calibration With Delay Effects Rejected for Incremental Encoders Used in High-Speed PMSMs

Yaofei Han, Chao Gong, Zhixun Ma, Chunqiang Liu, Wenzhen Li, Guozhen Chen

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

In this letter, we propose a novel cumulative error calibration method for the incremental encoders used in permanent magnet synchronous motors (PMSM) based on precise position estimation and counter value error (CVE) compensation. First, a sliding-mode observer (SMO) with analog delay compensated is innovatively developed to estimate the precise rotor position. The novel analog delay compensation method is achieved based on two sequential procedures: phase delay computation and current compensation. Then, relying on the errors between the accurate position estimated by the SMO and the measured one, the CVE can be calculated to correct the output of the counter. Finally, the experiment is conducted on a three-phase 1.5 kW PMSM to validate the proposed cumulative error calibration strategy.

Original languageEnglish
Pages (from-to)9667-9672
Number of pages6
JournalIEEE Transactions on Industrial Electronics
Volume69
Issue number9
DOIs
StatePublished - 1 Sep 2022

Keywords

  • Analog delay
  • cumulative error calibration
  • incremental encoder
  • permanent magnet synchronous motor (PMSM)
  • sliding-mode observer (SMO)

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