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Current Harmonics Suppression of Six-Phase Permanent-Magnet Synchronous Motor Drives Using Back-Electromotive Force Harmonics Compensation

Author

Listed:
  • Po-Sheng Huang

    (Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei City 106, Taiwan)

  • Cheng-Ting Tsai

    (Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei City 106, Taiwan)

  • Jonq-Chin Hwang

    (Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei City 106, Taiwan)

  • Cheng-Tsung Lin

    (Chroma ATE Inc., Taoyuan City 333, Taiwan)

  • Yu-Ting Lin

    (Chroma ATE Inc., Taoyuan City 333, Taiwan)

Abstract

This paper investigates a back-electromotive force (EMF) harmonic compensation strategy for six-phase permanent-magnet synchronous motors (PMSMs) to reduce current harmonics and improve system performance. Ideally, the back-EMF waveform should be perfectly sinusoidal. However, manufacturing imperfections such as suboptimal magnetic circuit design, uneven winding distribution, and mechanical eccentricity introduce low-order spatial harmonics, particularly the 5th, 7th, 11th, and 13th orders, which distort the back-EMF, increase current harmonics, complicate control, and reduce efficiency. To address these issues, this study proposes a compensation strategy utilizing common-mode and differential-mode current control. By injecting the 6th and 12th harmonics into the decoupled voltage commands along the d-axis and q-axis, the strategy significantly reduces current harmonic distortion. Experimental validation was conducted using a TMS320F28386D microcontroller, which controlled dual inverters via PWM signals and processed real-time current feedback. Rotor position feedback was provided by a resolver to ensure precise and responsive motor control. At a rotational speed of 900 rpm, with a peak phase current I m of 200 A and an IGBT switching frequency of 10 kHz, the phase- a current total harmonic distortion (THD) was reduced from 11.86% (without compensation) to 6.83% (with compensation). This study focused on mitigating harmonics below the 14th order. The experimental results demonstrate that the proposed back-EMF harmonic compensation strategy effectively minimizes current THD, highlighting its potential for improving the performance and efficiency of multi-phase motor systems.

Suggested Citation

  • Po-Sheng Huang & Cheng-Ting Tsai & Jonq-Chin Hwang & Cheng-Tsung Lin & Yu-Ting Lin, 2024. "Current Harmonics Suppression of Six-Phase Permanent-Magnet Synchronous Motor Drives Using Back-Electromotive Force Harmonics Compensation," Energies, MDPI, vol. 17(24), pages 1-14, December.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:24:p:6280-:d:1542655
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    1. Haopeng Zhang & Xiangyu Zhai & Jiahui Zhang & Xiang Bai & Zening Li, 2024. "Mechanism Analysis of the Effect of the Equivalent Proportional Coefficient of Inertia Control for a Doubly Fed Wind Generator on Frequency Stability in Extreme Environments," Sustainability, MDPI, vol. 16(12), pages 1-17, June.
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