Electronic Science and Technology ›› 2024, Vol. 37 ›› Issue (3): 34-43.doi: 10.16180/j.cnki.issn1007-7820.2024.03.005

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Simplified Model Predictive Current Control for the Six-Phase Full-Bridge Inverter Fed PMSM Drive

YUAN Qingqing1, WU Ruiqi1, MA Ting2, XIE Xiaotong1   

  1. 1. School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China
    2. Economic and Technological Research Institute,State Grid Ningxia Electric Power Co. Ltd.,Ningxia 750004,China
  • Received:2022-10-25 Online:2024-03-15 Published:2024-03-11
  • Supported by:
    National Key R&D Program of China(2018YFB0104603);Shanghai Sailing Program(18YF1418300)

Abstract:

Although the full bridge inverter motor drive or open winding structure has the advantages of interphase electrical isolation, good fault tolerance and low switching frequency of the device, there are many inverter output voltage vectors, serious redundancy and control constraints.In this study, a simplified model prediction current control algorithm based on two-stage vector optimization is proposed for a six-phase permanent magnet synchronous motor driven by a six-phase full-bridge inverter powered by a common DC bus, which can effectively track and control the stator fundamental current and suppress the harmonic and zero sequence components of the stator current.Based on the criteria of stator fundamental current control, harmonic and zero sequence current suppression, 729 voltage vectors output by inverter are optimized, and 12 candidate voltage vectors are obtained.Based on this, the model predictive current control algorithm is designed.The experimental results show that the simplified model predictive current control method in this study has good dynamic and static performance, and can effectively suppress harmonic and zero sequence current components while controlling fundamental wave current, which can provide theoretical support for the research of polyphase motor drive system.

Key words: six-phase full-bridge inverter, six-phase permanent magnet synchronous motor, vector space decoupling, second-order vector optimization, model predictive current control, fundamental current control, harmonic current suppression, zero sequence current suppression

CLC Number: 

  • TP273