Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Current sensor scale error compensation method for current vector-controlled PMSM drive at standstill

  • Kwang‑Woon Lee (Division of Marine Mechatronics, Mokpo National Maritime University (MMU)) ;
  • Sang‑Il Kim (Division of Electrical Engineering, Sunchon National University)
  • Received : 2025.07.23
  • Accepted : 2025.09.17
  • Published : 2025.11.20
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Abstract

The current measurement errors in current vector-controlled permanent magnet synchronous motor (PMSM) drives degrade torque control performance. Particularly, when multiple current sensors are used for phase current measurement and each sensor has a different scale, torque ripple occurs at frequencies twice the electrical frequency of the motor. This paper analyzes the effect of scale errors in measured currents during the process of aligning the rotor in a specific direction to set the initial rotor position in current vector-controlled PMSM drives on the output voltage of the inverter. Based on this analysis, this paper proposes a method to correct the scale errors between current sensors. Additionally, this paper validates the effectiveness of the proposed approach through experiments and discusses potential challenges during its practical implementation.

Keywords

Acknowledgement

This work was supported by the Technology Innovation Program (202320026705, Development of the 5kW High Efficiency Integrated Power Conversion System Manufacturing Technology for Energy Storage System (ESS)) funded By the Ministry of Trade, Industry & Energy (MOTIE, Korea)

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