The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
권호 표지
DOI QR코드

DOI QR Code

A Novel Asymmetrical Half-type IPM BLDC Motor Structure for Reducing Torque Ripple

토크 리플 저감을 위한 새로운 비대칭 하프-타입 영구자석 매입형 브러시리스 직류 모터 구조

  • Sim, Yosub (Dept. of Adaptive Machine Systems, Graduate School of Engineering, Osaka University) ;
  • Niguchi, Noboru (Dept. of Adaptive Machine Systems, Graduate School of Engineering, Osaka University) ;
  • Hirata, Katsuhiro (Dept. of Adaptive Machine Systems, Graduate School of Engineering, Osaka University)
  • Received : 2015.08.10
  • Accepted : 2015.11.18
  • Published : 2016.04.20
Download PDF
⟨ Previous Next ⟩

Abstract

This paper proposes a novel asymmetrical interior permanent magnet (IPM) brushless DC (BLDC) motor structure, which utilizes half-type permanent magnet (PM) configuration and has asymmetrical side gaps (slot next to the PMs) for reducing torque ripples. This structure uses 24% less volume of PMs than conventional IPM BLDC motor with a full set of magnets. The characteristics of the proposed motor are compared with three other half-type IPM BLDC motors through finite elements method (FEM) analysis, and the usefulness of the proposed motor was verified through experimental evaluation on prototypes of the conventional motor and proposed motor under various torque load conditions. This research obtained a high-performance IPM BLDC motor while decreasing manufacturing cost at the same time.

Keywords

References

  1. K. J. Kang, G. H. Jang, and S. J. Sung, "Frequency characteristics of BEMF, cogging torque and UMF in a HDD spindle motor due to unevenly magnetized PM," IEEE Trans. on Magnetics, Vol. 49, No. 6, pp. 2578-2581, Jun. 2013. https://doi.org/10.1109/TMAG.2013.2245317
  2. H. S. Kim, Y. M. You, and B. I. Kwon, "Rotor shape optimization of interior permanent magnet BLDC motor according to magnetization direction," IEEE Trans. on Magnetics, Vol. 49, No. 5, pp. 2193-2196, May 2013. https://doi.org/10.1109/TMAG.2013.2242056
  3. P. Upadhayay and K. R. Rajagopal, "Torque ripple reduction using magnet pole shaping in a surface mounted permanent magnet BLDC motor," in Proc. 2013 International Conference on Renewable Energy Research and Applications (ICRERA), pp. 516-521, Oct. 2013.
  4. Z. Azar, Z. Q. Zhu, and G. Ombach, "Influence of electric loading and magnetic saturation on cogging torque, back-EMF and torque ripple of PM machines," IEEE Trans. on Magnetics, Vol. 48, No. 10, pp. 2650-2658, Oct. 2012. https://doi.org/10.1109/TMAG.2012.2201493
  5. W. Q. Chu and Z. Q. Zhu, "Investigation of torque ripples in permanent magnet synchronous machines with skewing," IEEE Trans. on Magnetics, Vol. 49, No. 3, pp. 1211-1220 Mar. 2013. https://doi.org/10.1109/TMAG.2012.2225069
  6. F. Zhao, T. A. Lipo, and B. I. Kwon, "A novel two-phase permanent magnet synchronous motor modeling for torque ripple minimization," IEEE Trans. on Magnetics, Vol. 49, No. 5, pp. 2355-2358, May 2013. https://doi.org/10.1109/TMAG.2013.2241753
  7. J. Asama, M. Amada, M. Takemoto, A. Chiba, T. Fukao, and A. Rahman, "Voltage characteristics of a consequent-pole bearingless PM motor with concentrated windings," IEEE Trans. on Magnetics, Vol. 45, No. 6, pp. 2823-2826, Jun. 2009. https://doi.org/10.1109/TMAG.2009.2018679
  8. T. Yamada, Y. Nakano, J. Asama, A. Chiba, T. Fukao, T. Hoshino, and A. Nakajima, "Outer rotor consequent-pole bearingless motor with improved start-up characteristics," IEEE Trans. on Magnetics, Vol. 44, No. 11, pp. 4273-4276, Nov. 2008. https://doi.org/10.1109/TMAG.2008.2001845
  9. J. Asama, D. Kanehara, T. Oiwa, and A. Chiba, "Development of a compact centrifugal pump with a two-axis actively positioned consequent-pole bearingless motor," IEEE Trans. on Industry Applications, Vol. 50, No. 1, pp. 288-295, Jan./Feb. 2014. https://doi.org/10.1109/TIA.2013.2270452
  10. Y. S. Sim, N. Niguchi, and K. Hirata, "A novel half-type permanent magnet structure of IPM BLDC motor," in Proc. 2015 IEEE Magnetics Conference (INTERMAG), FY-05, May. 2015.