Analysis and Reduction of Stator Copper Losses in Three-phase Four-switching Inverter-fed SPMSM Drives Using Space Vector Pulse-width Modulation

  • Xiao-Liang Jin
  • Sheng-Fu Liu
  • Rong-Xiang ZhaoEmail author
Original Article


In consideration of cost reduction, three-phase four-switch (TPFS) converters are applied in permanent magnet synchronous motor/generator (PMSM/G) drive application. However, the reduced number of active vectors has a negative influence on the signal waveform and the stator copper losses. With respect to the stator copper loss reduction, the root-mean-square (RMS) value of the stator copper loss ripple is chosen as a performance criterion in this paper. It is proved in this paper that the stator current ripple plays a more important role than the equivalent resistance in the copper loss ripples by double Fourier integral analysis. Thus, the RMS value of the stator current ripple can be applied as an analytical approach to evaluate the stator harmonic copper losses of the two proposed space vector modulation (SVM). Consequently, the proposed SVM strategy realizes the high-frequency stator copper loss ripple reduction. The experimental results demonstrate the validation of the proposed analysis.


Three-phase four-switch (TPFS) Space vector modulation (SVM) Stator copper loss ripple reduction Surface-mounted permanent magnet synchronous motor (SPMSM) system 



Project supported by the Major Program of the National Natural Science Foundation of China (Grant no. 51690182).


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Copyright information

© The Korean Institute of Electrical Engineers 2019

Authors and Affiliations

  1. 1.College of Electrical EngineeringZhejiang UniversityHangzhouChina

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