High-Frequency Current Harmonic Analysis and Suppression in Dual Three-Phase PMSMs with Advanced Carrier Phase Shift PWM

Boyuan Zheng, Jibin Zou, Yongxiang Xu, Guodong Yu, Lu Wang, Pericle Zanchetta

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Carrier frequency current harmonic peaks induced by Pulse Width Modulation (PWM) in motion control systems will cause high-frequency torque ripple, efficiency decrease and EMI problems. It is proved in this article that carrier-frequency harmonic current components in dual three-phase permanent magnet synchronous motor (DTP-PMSMs) systems exhibit a different distribution and are more severe compared to the three-phase ones due to the existence of the low-impedance harmonic subspace, thereby limiting the further application of DTP-PMSMs. To address this issue, this paper proposes an advanced carrier phase shift modulation strategy. Firstly, by introducing a π/2 phase shift between two PWM modules, the dominating 1st carrier frequency harmonic current components in z1-z2 subspace are halved. The high-frequency torque ripple, located at 2nd carrier frequency, is also suppressed. Periodic Frequency Modulation (PFM) is utilized in the proposed strategy to further suppress the high-frequency harmonic current components in both α-β and z1-z2 subspaces. The effectiveness of the proposed strategy is demonstrated theoretically and verified by simulation and experiments. DC-link current can also benefit from the proposed strategy. Compared with conventional SVPWM and random SVPWM, the proposed strategy has a better harmonic suppression effect without inducing distortion.

Original languageEnglish
Pages (from-to)2569-2581
Number of pages13
JournalIEEE Transactions on Power Electronics
Issue number2
Early online date8 Nov 2023
Publication statusPublished - Feb 2024

Bibliographical note

© 2024 Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.


This work was supported by National Natural Science Foundation of China under Grants 52307045 and 52077043.


  • carrier waves
  • dual three-phase permanent magnet synchronous motor (DTP-PMSM)
  • harmonics
  • periodic frequency modulation
  • phase shift

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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