IEEE Access (Jan 2021)

A Study on Accurate Initial Rotor Position Offset Detection for a Permanent Magnet Synchronous Motor Under a No-Load Condition

  • Dongok Kim,
  • Jungjun Kim,
  • Heesun Lim,
  • Jihwan Park,
  • Junseo Han,
  • Geunho Lee

DOI
https://doi.org/10.1109/ACCESS.2021.3078821
Journal volume & issue
Vol. 9
pp. 73662 – 73670

Abstract

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This paper proposes a resolver offset calibration algorithm that can detect offset with high precision just by configuring a very simple experimental environment. This use of a simple experimental environment holds a great advantage for large-capacity permanent magnet synchronous motors (PMSMs) that require substantial resources to configure an experimental environment, such as EV traction motors. The proposed algorithm is designed based on the PMSM voltage equation. The algorithm is first verified for its validity through simulation with Simulink. Subsequently, it is implemented based on the C-language and installed on an inverter for verification experiments. The implemented algorithm is very simple and requires little execution time and memory. The error in the calibrated offset is experimentally found to converge within 3-bits based on 12-bits (the resolution of the commonly used RDC), and the results have very little deviation.

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