Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Six-step operation strategy for direct self-control method of interior permanent magnet synchronous motors based on torque angle

  • Han, Byeol (Department of Electrical and Computer Engineering, Ajou University) ;
  • Lee, June-Seok (Department of Electronics and Electrical Engineering, Dankook University) ;
  • Bak, Yeongsu (Department of Electrical Energy Engineering, Keimyung University) ;
  • Lee, Kyo-Beum (Department of Electrical and Computer Engineering, Ajou University)
  • Received : 2021.03.31
  • Accepted : 2021.06.18
  • Published : 2021.09.20
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Abstract

This paper proposes a six-step operation strategy for direct self-control (DSC) method of interior permanent magnet synchronous motor (IPMSM) based on the torque angle. Conventional DSC methods for induction motors (IMs) have been studied for railway applications since these methods are suitable for controlling high-power traction drives and for extending voltage utilization through a six-step inverter operation. However, IPMSMs controlled via conventional DSC methods for IMs cannot be properly controlled through a six-step operation since the torque angle is not considered. In addition, synchronous frame rotation causes a phase error at high speeds owing to the time delay of digital controllers. This paper presents a torque angle compensation that improves the dynamic performance. The effectiveness of the proposed DSC method was verified through experimental results.

Keywords

Acknowledgement

This research was supported by Korea Electric Power Corporation, Korea Institute of Energy Technology Evaluation and Planning, and the Ministry of Trade, Industry & Energy (Grant No. R19XO01-20 and Grant No. 20194030202370)

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