The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지
DOI QR코드

DOI QR Code

Optimized Design of Rotor Considering Cost-Reduction of Small BLDC Motor for the Water Pump

펌프용 소형 BLDC 모터의 원가절감을 고려한 회전자 최적화 설계

  • Received : 2012.11.01
  • Accepted : 2013.03.21
  • Published : 2013.04.01
Download PDF
⟨ Previous Next ⟩

Abstract

In the present study, a BLDC motor for a pump in which a neodymium PM is replaced with a Ferrite PM has been developed in preparation for the cost increase and to ensure the stability of the resource supply. One of the currently used motors for pumps is a BLDC motor having an interior PM wherein a rare-earth PM is adopted. However, a BLDC motor for a pump is designed to have large airgap because of the use of a waterproof insulator according to its structural characteristics, and therefore, a SPM structure is suitable. Hence, an SPM BLDC motor in which a Ferrite PM is used is designed. Nevertheless, the use of Ferrite instead of rare-earth materials causes a deterioration in the performance of the electric motor, such as a decrease in the BEMF and the maximum power of the motor and the irreversible demagnetization of the PM. In order to mitigate such disadvantages, an optimized design of the BLDC motor is developed by changing each design parameter and by improving the electromagnetism structure.

Keywords

References

  1. H. J. Kim, S. M. Kim, "Rare Earth Dispute and Trend in Development of NdFeB Anisotropic Bonded Magnets", Journal of the Korean magnetics society, v.22 no.3, pp.109-115, 2012 https://doi.org/10.4283/JKMS.2012.22.3.109
  2. J. G. Lee, J. H. Yu, H. J. Kim and T. S. Jang , "Trend in Research and Development Related to Motors and Permanent Magnets for Solving Rare-earth Resources Problem", Journal of the Korean Magnetics Society, Vol 22, No 2, April, 2012
  3. Jung-Pil Yang, "The Current Status and Future Outlook of the Bonded Rare-earth Magnet", Journal of the Korean Magnetics Society, Vol 21, No 4, August 2011 https://doi.org/10.4283/JKMS.2011.21.4.147
  4. Jung-Goo Lee, Youn-Kyoung Baek, Ji-Hun Yu and Chul-Jin Choi, "Trend in Research and Development Related to Lean Heavy Rare-earth Permanent Magnets for Next-generation Motors", J. Kor. Powd. Met. Inst., Vol. 19, No. 2, 2012 https://doi.org/10.4150/KPMI.2012.19.2.151
  5. Su-Jin Lee, Sung-Il Kim, Jung-Pyo Hong, Byoung-Young Song, Jong Won Park, "Characteristic Analysis of the Water Pump Motor considering Polar Anisotropic Ferrite Bonded Magnet", Electrical Machines and Systems(ICEMS), pp1242-1245, Oct. 2010
  6. Byeong-woo Kim, Hyun-dock Cho, Do-hee Lee, "Characteristic Analysis of BLDC Motor for Vehicle Compressor Based on High Voltage", Transactions of Korean Society of Automotive Engineers, v.16 no.3, pp.44-51, 2008
  7. Duane Hanselman, "Brushless Permanent Magnet Motor Design", The Writers' Collective, 2003.
  8. S. Zeze, T. Todaka, and M. Enokizono, "Improvement of Rotor Structure of Concentrated Surface Permanent Magnet Synchronous Motor", Electrical Machines and Systems(ICEMS), pp1-6, Nov., 2009
  9. Jang-Young Choi, Hyung-Il Park, Seok-Myeong Jang and Sung-Ho Lee ,"Design and Analysis of Surface-Mounted PM Motor of Compressor for Electric Vehicles Applications according to Slot/Pole Combinations", The Transactions of the Korean Institute of Electrical Engineers, v.60 no.10, pp.1846-1857, 2011 https://doi.org/10.5370/KIEE.2011.60.10.1846
  10. Masayuki Sanada, Yukinori Inoue and Shigeo Morimoto, "Rotor Structure for Reducing Demagnetization of Magnet in a PMASynRM with Ferrite Permanent Magnet and its Characteristics", Energy Conversion Congress and Exposition (ECCE), 2011 IEEE, pp.4189-4194, Sept. 2011