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Compensation of Interpolation Error for Look-Up Table-Based PMSM Control Method in Maximum Power Control

Author

Listed:
  • Do-Yun Kim

    (Inverter Department, LG Magna e-Powertrain, 322, Gyeongmyeong-daero, Seo-gu, Incheon 22744, Korea
    These authors contributed equally to this work.)

  • Jung-Hyo Lee

    (Department of Electrical Engineering, College of Engineering, Kunsan National University, Gunsan 54150, Korea
    These authors contributed equally to this work.)

Abstract

This paper proposes a compensation method for interpolation error of the maximum power control of a PMSM control system that generates current commands through a look-up table. A torque control system using a look-up table created through experiments has superior characteristics, such as control stability and torque accuracy, compared to a system that executes torque control via a linear controller based on modeling. However, it is impossible to generate information on all the currents for the output torque in the table. Therefore, because the data stored in the look-up table have a discrete characteristic, they are linearly interpolated to generate a current command for the torque command. However, the PMSM current trajectory is generally elliptical, which causes an error owing to linear interpolation, reducing the maximum output power. In particular, when the table data are insufficient, such as in the high-speed operation range, the reduced maximum output cannot be ignored. This paper proposes a compensation method for the interpolation error using two feedforward compensators and a PI controller, which was verified through experiments.

Suggested Citation

  • Do-Yun Kim & Jung-Hyo Lee, 2021. "Compensation of Interpolation Error for Look-Up Table-Based PMSM Control Method in Maximum Power Control," Energies, MDPI, vol. 14(17), pages 1-16, September.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:17:p:5526-:d:629053
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    References listed on IDEAS

    as
    1. Xin Gu & Tao Li & Xinmin Li & Guozheng Zhang & Zhiqiang Wang, 2019. "An Improved UDE-Based Flux-Weakening Control Strategy for IPMSM," Energies, MDPI, vol. 12(21), pages 1-17, October.
    2. Do-Yun Kim & Jung-Hyo Lee, 2020. "Low Cost Simple Look-Up Table-Based PMSM Drive Considering DC-Link Voltage Variation," Energies, MDPI, vol. 13(15), pages 1-11, July.
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    Cited by:

    1. Hyun-Jae Lee & Jin-Geun Shon, 2021. "Improved Voltage Flux-Weakening Strategy of Permanent Magnet Synchronous Motor in High-Speed Operation," Energies, MDPI, vol. 14(22), pages 1-15, November.
    2. Hyunjae Lee & Gunbok Lee & Gildong Kim & Jingeun Shon, 2022. "Variable Incremental Controller of Permanent-Magnet Synchronous Motor for Voltage-Based Flux-Weakening Control," Energies, MDPI, vol. 15(15), pages 1-15, August.

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