대한전기학회논문지:전기기기및에너지변환시스템부문B (The Transactions of the Korean Institute of Electrical Engineers B)

대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

반경방향 착자형과 Halbach 배열형 영구자석 회전자를 갖는 고속 슬롯리스 기기의 공극자속밀도 특성 비교

Comparison on the Airgap Flux Density of High-Speed Slotless Machines with Radial Magnetization and Halbach Array PM Rotor

  • 발행 : 2001.07.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

High speed brushless permanent magnet(PM) machines need a key technology to minimize the iron core losses in stator and the eddy current losses in the retained sleeve and magnets caused by slotting harmonics. Thus, slotless or iron-coreless brushless PM machines have been applied for a very high rotational speed and/or the ripple-free torque. Unfortunately, slotless or coreless PM machines have lower open-circuit field than slotted and/or iron-cored types, which cause to reduce power density. Fortunately, Halbach array can generate the strong magnetic field systems without additional magnetic materials. In this paper, the 4-pole Halbach array is applied to the high speed machine and is compared with the radial magnetized PM array in field system. The iron-/air-cored stator of PM machine is constructed with/without winding slots. Open circuit magnetic fields of each type are presented from the analytical method and finite element method. Consequently, it is confirmed that the Halbach array field system with slotless stator is more suitable to the high speed motor because it has high flux density, sinusoidal flux distribution than others.

키워드

참고문헌

  1. D.E. Hesmondhalgh, MSc, PhD, CEng, MIEE, D. Tipping, BA, BSc, Phd, M. Amrani, MSc, 'Design and construction of high-speed high-performance direct-drive handpiece', IEE Proceedings, Vol. 134, No.6 Nov. 1987
  2. Isao Takahashi, Takehisa Koganezawa, Guijia Su, 'A super high speed PM motor drive system by a quasi-current source inverter', IEEE Tran. on IAS, Vol. 30, No. 3, May/June 1994
  3. H. Hofmann, S.R.Sanders, 'Synchronous reluctance motor/alternator for flywheel energy storage systems', in IEEE workshop on Power Electronics in Transportation, October 24-25, 1996, Dearborn, Mich. pp. 199-206 https://doi.org/10.1109/PET.1996.565929
  4. B.T. Merritt, R.F. Post, G.R. Driefuerst, D.A. Bender, 'Halbach Array Motor/Generators-A Novel Generalized Electric Machine,' Lawrence Livermore National Laboratory
  5. S.M.Jang, S.S.Jeong, D.W.Ryu, S.K.Choi, 'Comparison of three types PM brushless machines for an electro-mechanical battery,' IEEE Transactions on Magnetics, Vol. 36, No. 5 September 2000 https://doi.org/10.1109/20.908892
  6. 장석명, 정상섭, 류동완, 최상규, 'EMB용 전동발전기 선정을 위한 슬롯형과 슬롯리스 Ring-wound형 영구자석 브러시리스 기기의 특성 비교', 대한전기학회 제50B권 제3호, 2001
  7. J.R. Hendershot Jr., TJE Miller, 'Design of brushless permanent-magnet motors,' Oxford, 1994
  8. 장석명, 서진호, 정상섭, 최상규, '영구자석 Halbach 배열을 이용한 초고속 모터용 계자시스템의 구성과 특성 해석', 대한전기학회 제48B권 제4호 pp152, 1999
  9. 장석명, 서진호, 정상섭, 최상규, 함상용, '전기기계식 배터리 시스템용 초고속 전동발전기의 설계, 제작 및 모드별 특성', 대한전기학회 제48B권 제8호 pp400-407, 1999
  10. 장석명, 류동완, 양현섭, 정상섭, 최상규, 함상용, '플라이 휠 에너지 저장 시스템용 Ring-Wound형 초고속 전동발전기의 설계 및 특성', 대한전기학회 하계학술대회, EMO-15, A권 pp.46-48, 1999.7.19-21
  11. Lawrence W. Langley, Robert L. Fisher, Toroidally wound brushless DC motor,' U.S. PATENT, Patent number 4547713, Oct. 15, 1985
  12. K. Atallah, D. Howe, 'The application of Halbach Cylinders to Brushless AC Servo Motors,' IEEE Transactions on Magnetics, Vol. 34, No. 4, July 1998 https://doi.org/10.1109/20.706795
  13. K. Halbach. 'Design of Permanent Multipole Magnets with Oriented Rare Earth Cobalt Material', Nuclear instruments and Methods, 169, 1980(pp.1-10) https://doi.org/10.1016/0029-554X(80)90094-4
  14. Seok-Myeong Jang, Sang-Sub Jeong, Dong-Wan Ryu, Sang-Kyu Choi, 'Design and analysis of high speed slotless PM machine with Halbach array', IEEE Transaction of Magnetics, 2001(to be published) https://doi.org/10.1109/20.951319