Harmonic current control for dual three‑phase PMSM using average periodic delay‑based repetitive controller

Sanghyuk Shin; Seongeun Lee; Younghoon Cho

Harmonic current control for dual three‑phase PMSM using average periodic delay‑based repetitive controller

Sanghyuk Shin

Seongeun Lee

Younghoon Cho

Vol. 25, No. 9, pp. 1698-1708, Sep. 2025

10.1007/s43236-025-01121-2

Dual three phase

Phase-based repetitive control

Current harmonics

Harmonic suppression

Six-phase PM motor

Abstract

This article proposes an average periodic delay-based repetitive controller (APDRC) designed to mitigate the harmonic currents caused by imbalance in the windings of a dual three-phase permanent magnet synchronous motor (DTP-PMSM). DTP-PMSM systems generate large stator current harmonics easily because of their non-sinusoidal flux distribution, coupling mutual inductance between two sets of windings, and inverter nonlinearity caused by deadtime. Such problems result in increases in the peak value of the phase current, deteriorate the system itself, and decreased efficiency. In addition, the imbalance between two sets of windings or between phase windings induce negative sequence currents, which leads to second order torque ripple. To solve this problem, APDRC is applied to suppress recurring errors and to maintain robust performance under operating frequency variation, ensuring that its harmonic current reduction capability remains stable despite rotational speed changes of the motor. A mathematical analysis of the harmonic components in the DTP-PMSM under unbalanced conditions is presented, confirming the presence of recurring errors. The effectiveness of the proposed APDRC in reducing harmonic currents under unbalanced conditions is validated through experiments, which demonstrates consistent harmonic current suppression performance and zero steady-state errors under operating frequency variation of the motor drive system.

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Cite this article

[IEEE Style]

S. Shin, S. Lee, Y. Cho, "Harmonic current control for dual three‑phase PMSM using average periodic delay‑based repetitive controller," Journal of Power Electronics, vol. 25, no. 9, pp. 1698-1708, 2025. DOI: 10.1007/s43236-025-01121-2.

[ACM Style]

Sanghyuk Shin, Seongeun Lee, and Younghoon Cho. 2025. Harmonic current control for dual three‑phase PMSM using average periodic delay‑based repetitive controller. Journal of Power Electronics, 25, 9, (2025), 1698-1708. DOI: 10.1007/s43236-025-01121-2.