Journal of international Conference on Electrical Machines and Systems

Journal of International Conference on Electrical Machines and Systems (대한전기학회 분과)
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Harmonic Winding Factors and MMF Analysis for Five-phase Fractional-slot Concentrated Winding PMSM

  • Kang, Huilin (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology) ;
  • Zhou, Libing (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology) ;
  • Wang, Jin (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology)
  • Received : 2013.10.17
  • Accepted : 2013.12.01
  • Published : 2014.03.01
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Abstract

To enhance torque density by harmonic current injection, optimal slot/pole combinations for five-phase permanent magnet synchronous motors (PMSM) with fractional-slot concentrated windings (FSCW) are chosen. The synchronous and the third harmonic winding factors are calculated for a series of slot/pole combinations. Two five-phase PMSM, with general FSCW (GFSCW) and modular stator FSCW (MFSCW), are analyzed and compared in detail, including the stator structures, star of slots diagrams, and MMF harmonic analysis based on the winding function theory. The analytical results are verified by finite element method, the torque characteristics and phase back-EMF are also taken into considerations. Results show that the MFSCW PMSM can produce higher average torque, while characterized by more MMF harmonic contents and larger ripple torque.

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References

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