Radial Force Control of a Novel Hybrid Pole BLSRM

  • Wang, Hui-Jun (Dept. of Electrical and Mechatronics Engineering., Kyungsung University) ;
  • Lee, Dong-Hee (Dept. of Electrical and Mechatronics Engineering., Kyungsung University) ;
  • Ahn, Jin-Woo (Dept. of Electrical and Mechatronics Engineering., Kyungsung University)
  • Published : 2009.11.20

Abstract

This paper presents a novel hybrid pole BLSRM (Bearingless Switched Reluctance Motor) and its radial force control scheme. The proposed hybrid pole BLSRM has separated radial force poles and rotating torque poles. According to the FEM analysis, the proposed BLSRM has an excellent linear characteristic of radial force and controllability that is independent from the torque current. The radial force can be produced by the radial force winding which is wound at the separated radial force poles. The rotating torque is produced by the excitation current of the torque windings which are wound at the torque pole. The proposed radial force control scheme is independent of the phase torque winding current. A simple PID controller and look-up table are used to maintain a constant rotor air-gap. The proposed BLSRM and its radial force control scheme are verified by FEM analysis and experimental tests.

Keywords

References

  1. M. Takemoto, A. Chiba, H. Akagi and T. Fukao, "Radial force and torque of a bearingless switched reluctance motor operating in a region of magnetic saturation," in Conf. Record IEEE-IAS Annual Meeting, pp. 35–42, 2002
  2. M. Takemoto, K. Shimada, A. Chiba and T. Fukao, "A design and characteristics of switched reluctance type bearingless motors," in Proc. 4th Int. Symp. Magnetic Suspension Technology, Vol. NASA/CP-1998-207654, pp. 49-63, May 1998
  3. Li Chen, Wilfried Hofmann, "Analytically computing winding currents to generate torque and levitation force of a new bearingless switched reluctance motor," in Proc.12th EPE-PEMC, pp. 1058-1063. Aug. 2006
  4. Carlos R. Morrison. Bearingless Switched Reluctance Motor. U.S. Patent 6,727,618, 2004
  5. C. S. Kim, M. G. Kim, H. G. Lee and J. W. Ahn, "Development of SRM and drive system for small pallet truck," Annual Proc. of KIEE, pp.732-734, 2000
  6. C. S. Kim, S. G. Oh, J. W. Ahn and Y. M. Hwang, "The design and the characteristics of SRM drive for low speed vehicle," Annual Proc. Of KIEE, pp. 871-873, 2001
  7. K. Ohyama, M. Naguib, F. Nashed, K. Aso, H. Fujii, H. Uehara, "Design using finite element analysis of a switched reluctance motor for electric vehicle," Journal of Power Electronics, Vol. 6. No. 2, pp. 163-171, April 2006
  8. S. Ayari, M. besbes, M. Lecrivain, and M. Gabsi, "Effectes of the air gap eccentricity on the SRM vibrations," in Proc. Int. Conf. Electr. Mach. and Drives, pp. 138-140, 1999
  9. N.R. Garrigan, W. L. Soong, C. M. Stephens, A. Storacc and T. A. Lipo, "Radial force characteristics of a switched reluctance machine," in Proc. IEEE IAS Annu. Meeting, Vol. 4, pp. 2250-2258, 1999
  10. I. Husain, A. Radun, and J. Nairus, "Unbalanced force calculation in switched reluctance machines," IEEE Trans. Magn., Vol. 36, No. 1, pp. 330-338 https://doi.org/10.1109/20.822543
  11. A. V. Radum, "Design considerations for the switched reluctance motor," IEEE Trans. Ind. Applicat., Vol. 31, pp. 1079-1087, Sep./Oct. 1995 https://doi.org/10.1109/28.464522
  12. Texas Instruments, TMS320F243/F241/C242 DSP Controllers Reference Guide - System and Peripherals, January 2000