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author:

Zheng, W. (Zheng, W..) [1] | Zhou, Y. (Zhou, Y..) [2]

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Scopus

Abstract:

Aimed at the problems of unbalanced capacitor neutral-point voltage and high common-mode voltage in a permanent magnet synchronous motor drive system powered by a T-type three-level inverter, a model predictive instantaneous torque control (MPITC) strategy based on finite voltage vector set optimization is proposed. First, in view of the influence of voltage vectors on the neutral-point voltage, only zero, small and large vectors are selected to participate in MPITC. Second, according to the relationship between the switching states and common-mode voltage, it is confirmed that 13 low common-mode voltage vectors participate in the control. To improve the operation performance of the motor, the long vector synthetic virtual voltage vector is used to replace the medium vector to participate in the model predictive control. Finally, according to the neutral-point potential and the motor current direction, the voltage vector which is favorable for maintaining the neutral-point voltage balance is selected from 19 voltage vectors as the preselected vector set. Experimental results show that the proposed control strategy can effectively reduce the electromagnetic torque, flux linkage pulsation and common-mode voltage amplitude, and the neutral-point voltage achieves balanced control. © 2025 Editorial Department of Journal of Power Supply. All rights reserved.

Keyword:

common-mode voltage model predictive instantaneous torque control (MPITC) neutral-point voltage balance T-type three-level inverter

Community:

  • [ 1 ] [Zheng W.]Fujian Key Laboratory of New Energy Generation and Power Conversion, Fuzhou University, Fuzhou, 350116, China
  • [ 2 ] [Zhou Y.]Fujian Key Laboratory of New Energy Generation and Power Conversion, Fuzhou University, Fuzhou, 350116, China

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Source :

Journal of Power Supply

ISSN: 2095-2805

Year: 2025

Issue: 2

Volume: 23

Page: 213-223

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WoS CC Cited Count:

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ESI Highly Cited Papers on the List: 0 Unfold All

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Chinese Cited Count:

30 Days PV: 0

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