DOI QR코드

DOI QR Code

Analysis of Coaxial Magnetic Gear with Low Gear Ratios for Application in Counter Rotating Systems

  • Shin, H.M. (Electrical Engineering Department, Dong-A University) ;
  • Chang, J.H. (Electrical Engineering Department, Dong-A University)
  • Received : 2015.05.07
  • Accepted : 2015.06.08
  • Published : 2015.06.30

Abstract

This paper describes the electromagnetic and mechanical characteristics of coaxial magnetic gear (CMG) with a low gear ratio. The analysis models are restricted to a CMG with a gear ratio of less than 2. The electromagnetic characteristics including transmitted torque and iron losses are presented according to the variation of the gear ratio. The pole pairs of high speed rotor are chosen as 6, 8 and 10 by considering the torque capability. As the gear ratio approaches 1, both iron losses on the ferromagnetic materials and eddy current losses on the rotor permanent magnets are increased. The radial and tangential forces on the modulating pieces are calculated using the Maxwell stress tensor. When the maximum force is exerted on the modulating pieces, the mechanical characteristics including stress and deformation are derived by structural analysis. In CMG models with a low gear ratio, the maximum radial force acting on modulating pieces is larger than that in CMG models with a high gear ratio, and the normal stress and normal deformation are increased in a CMG with a low gear ratio. Therefore, modulating pieces should be designed to withstand larger radial forces in CMG with a low gear ratio compared to CMG with a high gear ratio.

Keywords

References

  1. K. J. Paik, S. B. Suh, and H. H. Chun, KSOE 14, 36 (2000).
  2. Y. Inukai and F. Ochi, Proceeding of the first International Symposium on Marine Propulsors (SMP09) 112 (2009).
  3. K. S. Min, B. J. Chang, and H. W. Seo, International journal of Naval Architecture and Ocean Engineering 1, 29 (2009). https://doi.org/10.3744/JNAOE.2009.1.1.029
  4. L. Moroz, P. Pagur, Y. Govorushchenko, and K. Grebennik, Proceeding of International Symposium on Heat Transfer in Gas Turbine Systems, DOI 10.1615/390 (2009).
  5. S. N. Jung, T. S. No, and K. W. Ryu, Renewable Energy 30, 631 (2005). https://doi.org/10.1016/j.renene.2004.07.005
  6. K. Atallah and D. Howe, IEEE Trans. Magn. 37, 2844 (2001). https://doi.org/10.1109/20.951324
  7. K. Atallah, S. D. Calverley, and D. Howe, IEE Proc-Electr. Power Appl. 151, 135 (2004). https://doi.org/10.1049/ip-epa:20040224
  8. N. W. Frank and H. A. Toliyat, Proceeding of IEMDC 1224 (2009).
  9. D. J. Evans and Z. Q. Zhu, Proceeding of IEMDC 1403 (2011).
  10. P. Zheng, J. Bai, J. Lin, Z. Fu, Z. Song, and F. Lin, J. Appl. Phys. 115, 17E706 (2014). https://doi.org/10.1063/1.4859075
  11. T. Tarnhuvud and K. Reichert, IEEE Trans. Magn. 24, 443 (1988). https://doi.org/10.1109/20.43952
  12. L. Frosini and P. Pennacchi, Proceeding of IECON 1287 (2006).
  13. K. J. Meessen, J. J. H. Paulides, and E. A. Lomonova, IEEE Trans. Magn. 49, 536 (2013). https://doi.org/10.1109/TMAG.2012.2206821
  14. N. E. Dowling, Mechanical Behavior of Materials (4/E), Prentice Hall (2013) pp. 257-305.

Cited by

  1. Analysis of the Vibration Characteristics of Coaxial Magnetic Gear vol.53, pp.6, 2017, https://doi.org/10.1109/TMAG.2017.2665660