DOI QR코드

DOI QR Code

Analysis of an Interior Permanent-Magnet Machines with an Axial Overhang Structure based on Lumped Magnetic Circuit Model

  • Seo, Jangho ;
  • Seo, Jung-Moo
  • Received : 2015.11.18
  • Accepted : 2016.02.15
  • Published : 2016.03.31

Abstract

This paper shows a new magnetic field analysis of an interior permanent magnet (IPM) machines with an axial overhang structure wherein the rotor axial length exceeds that of the stator. The rotor overhang used to increase torque density of the radial flux machine is difficult to analyze because of extra consideration of axial direction, and thus it is general for machine designer to take 3-D finite element analysis (FEA) capable of considering both radial and axial complicated geometry in the machine. However, it requires too much computing time for preliminary design especially for optimization process. Therefore, in this paper a 2-D analytic method using a lumped magnetic circuit model (LMCM) is proposed to overcome the problem. For the analysis of overhang effect, the magnetic circuit is separated and solved from overhang and non-overhang regions respectively. For the validation of proposed concept, 3-D finite element analysis (FEA) is performed. From the analysis results, it is shown that our new proposed method presents good performance in terms of calculating electromotive force (EMF) and torque within a short time. Therefore, the proposed model can be useful in design of IPM with an overhang structure.

Keywords

FEA;overhang structure;interior permanent magnet (IPM) machines

References

  1. K. C. Kim and J. Lee, IEEE Trans. Magn 41, 10 (2005).
  2. K. C. Kim, D. H. Koo, and J. Lee, IEEE Trans. Magn 43, 4 (2006).
  3. J. M. Seo, I. S. Jung, H. K. Jung, and J. S. Ro, IEEE Trans. Magn 50, 5 (2014).
  4. K. Y. Hwang, H. Lin, S. H. Rhyu, and B. I. Kwon, IEEE Trans. Magn 48, 5 (2012).
  5. J. P. Wang, D. K. Lieu, W. L. Lorimer, and A. Hartman, J. Appl. Phys. 83, 11 (1998).
  6. Liang Fang, Do-Jin Kim, and Jung-Pyo Hong, Journal of KIEE, 60, 759 (2011).
  7. L. Zhu, S. Z. Jiang, Z. Q. Zhu, and C. C. Chan, IEEE Trans. Magn. 45, 8 (2009). https://doi.org/10.1109/TMAG.2008.2008671
  8. J. H. Seo and H. S. Choi, IEEE Trans. Magn. 50, 10 (2014).
  9. J. H. Seo and H. S. Choi, IEEE Trans. Appl. Supercond. 24, 3 (2014). https://doi.org/10.1109/TASC.2014.2374432
  10. J. H. Seo, J. Magn. 18, 3 (2013).
  11. J. R. Hendershot and T. J. E. Miller, Design of brushless permanent-magnet machines (2010).
  12. Z. Q. Zhu and D. Howe, IEEE Trans. Magn. 29, 1 (1993).
  13. D. Zarko, D. Ban, and T. A. Lipo, IEEE Trans. Magn. 42, 7 (2006).
  14. Z. Q. Zhu, L. J. Wu, and Z. P. Xia, IEEE Trans. Magn. 46, 4 (2010). https://doi.org/10.1109/TMAG.2010.2043304

Acknowledgement

Supported by : Kyungpook National University