Journal of Magnetics

The Korean Magnetics Society (한국자기학회)
권호 표지
DOI QR코드

DOI QR Code

Torque Ripple Reduction Using Torque Compensation Effect of an Asymmetric Rotor Design in IPM Motor

  • Hwang, Yong-Suk (Department of Automotive Engineering, Hanyang University) ;
  • Yoon, Myung-Hwan (Department of Automotive Engineering, Hanyang University) ;
  • Park, Jin-Cheol (Department of Automotive Engineering, Hanyang University) ;
  • Hong, Jung-Pyo (Department of Automotive Engineering, Hanyang University)
  • Received : 2017.02.14
  • Accepted : 2017.03.27
  • Published : 2017.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, torques of two motors are compared by Finite Element Analysis (FEA). One has a symmetric rotor structure and the other has an asymmetric rotor structure. The comparison shows that the asymmetric rotor structured motor has reduced torque ripple compared to the symmetric. The torque of the compared motor models was analyzed by separating into magnetic torque and reluctance torque. Through the analysis of torque component separated, it is shown that the magnetic torque and the reluctance torque compensate each other in the motor with the asymmetric structure rotor. Here "compensate" means decrementing the effect of one or more harmonics. It is shown how this compensation appears between the magnetic torque and the reluctance torque by looking into back electro motive force (emf) and the relative permeability distribution of rotor core.

Keywords

References

  1. L. Fang, S. O. Kwon, T. Sun, and J. P. Hong, ICEMS, 2010 Inter. Conf. on IEEE, 1239 (2010).
  2. N. Bianchi and S. Bolognani, ICEMS, 1222 (2000).
  3. N. Bianchi and S. Bolognani, IEEE Trans. Ind. Appl. 45, 921 (2009). https://doi.org/10.1109/TIA.2009.2018960
  4. J. F. Gieras, C. Wang, and J. C. Lai, Noise of Polyphase Electric Motors, CRC Press (2005) pp. 80, pp. 102-105.
  5. M. H. Yoon, D. Y. Kim, S. I. Kim, and J. P. Hong, J. Magn. 20, 387 (2015). https://doi.org/10.4283/JMAG.2015.20.4.387
  6. N. Bianchi, S. Bolognani, D. Bon, and M. D. Pre, IEEE Trans. Ind. Appl. 45, 921 (2009). https://doi.org/10.1109/TIA.2009.2018960
  7. J. R. Hendershot and T. J. E. Miller, Design of Brushless Permanent Magnet Machines, Motor Design Books (2010) pp. 178, 190-191, 211.
  8. J. A. Walker, D. G. Dorrell, and C. Cossar, IEEE Trans. Magn. 41, 3946 (2005). https://doi.org/10.1109/TMAG.2005.854973
  9. W. H. Press, S. A. Teukolsky, W. T. Vettering, and B. P. Flannery, Numerical Recipes in FORTRAN: The Art of Scientific Computing, Cambridge University Press (1992) pp. 490-498.
  10. A. E. Fitzgerald, C. Kingsley, and S. D. Umans, Electric Machinery, McGraw-Hill (2002) p. 3.
  11. B. Sheikh-Ghalavand, S. Vaez-Zadeh, and A. H. Isfahani, IEEE Trans. Magn. 46, 112 (2010). https://doi.org/10.1109/TMAG.2009.2030674