Journal of international Conference on Electrical Machines and Systems

Journal of International Conference on Electrical Machines and Systems (대한전기학회 분과)
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Improvement of Demagnetization by Rotor Structure of IPMSM with Dy-free Rare-Earth Magnet

  • Imamura, Keigo (Dept. of Electrical and Information Systems, Graduate School of Engineering, Osaka Prefecture University) ;
  • Sanada, Masayuki (Dept. of Electrical and Information Systems, Graduate School of Engineering, Osaka Prefecture University) ;
  • Morimoto, Shigeo (Dept. of Electrical and Information Systems, Graduate School of Engineering, Osaka Prefecture University) ;
  • Inoue, Yukinori (Dept. of Electrical and Information Systems, Graduate School of Engineering, Osaka Prefecture University)
  • Received : 2013.03.30
  • Accepted : 2013.05.22
  • Published : 2013.06.01
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Abstract

Permanent magnet (PM) motors that employ rare-earth magnets containing dysprosium (Dy) are used in electric and hybrid electric vehicles. However, it is desirable to reduce the amount of Dy used since it is expensive. This study investigates the rotor structure of a PM synchronous motor with a Dy-free rare-earth magnet. Flux barrier shapes and PM thicknesses that enhance the irreversible demagnetization are investigated. In addition, a rotor structure that improves the irreversible demagnetization is proposed. We demonstrate that the proposed rotor structure without Dy improves the irreversible demagnetization.

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References

  1. Ki.-Chan. Kim, K. Kim and H.J. Kim, "Demagnetization Analysis of Permanent Magnets According to Rotor Types of Interior Permanent Magnet Synchronous Motor" IEEE Trans. Mag. , Vol. 45, no. 6, pp. 2799-2802, 2009. https://doi.org/10.1109/TMAG.2009.2018661
  2. K. Murata, M. Sanada, S. Morimoto and Y. Takeda, "Torque Performance and Magnet Arrangement for IPMSM Considering Demagnetizing Ability", Proc. of ICEMS2006, DS1F1-10, 2006.
  3. T. Tokuda, M. Sanada and S. Morimoto, "Influence of Rotor Structure on Performance of Permanent Magnet Assisted Synchronous Reluctance Motor", Proc. of ICEMS2009, DS2G1-3, 2009.
  4. Abdul Rehman Tariq, Carlos E. Nino-Baron and Elias G. Strangas, "Overload Considerations for Design and Operation of IPMSMs" IEEE Trans. Ener. Conv. , Vol. 25, no. 4, pp. 921-930, 2010. https://doi.org/10.1109/TEC.2010.2053373
  5. Chang-Sung Jin, Dae-Sung Jung, Ki-Chan Kim, Yon-Do Chun, Hyung-Woo Lee and Ju Lee, "A Study on Improvement Magnetic Torque Characteristics of IPMSM for Direct Drive Washing Machine" IEEE Trans. Mag. , Vol. 45, no. 6, pp. 2811-2814, 2009. https://doi.org/10.1109/TMAG.2009.2018667
  6. Liang Fang, Sung-Il Kim, Soon-O. Kwon and Jung-Pyo Hong, "Novel Double-Barrier Rotor Designs in Interior-PM Motor for Reducing Torque Pulsation" IEEE Trans. Mag. , Vol. 46, no. 6, pp. 2183-2186, 2010. https://doi.org/10.1109/TMAG.2010.2041329
  7. Chao-hui Zhao, Hai-hong Qin and Yang-guang Yan, "The optimization of rare earth magnet thickness of IPM synchronous machine with flux concentration function" IEEE Trans. Mag. , Vol. 44, no. 11, pp. 185-190, 2005.