Analysis and Control of an Unsymmetrical 3-Phase VR Type Self Bearing Step Motor

비대칭 3상 가변형 셀프 베어링 스텝모터의 해석 및 제어

  • Kim, Dae-Gon (Dept. of Mechanical Engineering, Hanyang University)
  • 김대곤 (한양대학교 기계공학과)
  • Published : 2001.10.01

Abstract

The analysis and control algorithm of a new type unsymmetrical self-bearing step motor is presented. The motor actuator is used for both motor and bearing functionality without any redundant coil windings or redudant electromagnets for bearing functionality. Self bearing step motor layout and control current generation method for unsymmetrical position of electromagnets are described. This new current generation method without additional current for bearing functionality leads to minimize the power loss. As the result of the unbalance response approach, the constant torque is possible, even though the bearing functionality is added or not.

Keywords

References

  1. Daegon Kim, 'The Influence of the machining and assembling errors on the performance of the shaft supported by active magnetic bearings,' PhD. Dissertation, Mechanical Engineering, KAIST, Aug., 1998
  2. Daegon Kim, and Kyungwoong Kim, 'The influence of the machining and assembling errors on the performance of the shaft supported by active magnetic bearings,' JSME International Journal, Series C, vol. 41, no. 2, pp. 313-320, Jun., 1998
  3. Higuchi, 'Magnetically floating actuator having angular positioning function,' US Patent, no. 4683391, Jul., 1987
  4. Bischel, J., 'The bearingless electrical machine,' Proc. Int. Symp. Magn. Suspension Technol. 91, NASA Publication 3152, pp. 561-573, Aug., 1991
  5. Chiba, A., Rahman, M. A., and Fukao, T., 'Radial forces in bearingless reluctance motor,' IEEE Trans. Magnetics, vol. 27, no. 2, pp. 786-790, Mar., 1991 https://doi.org/10.1109/20.133292
  6. Okada, Y., Miyamoto, S., and Ohishi, T., 'Levitation and torque control of internal permanent magnet type bearingless motor,' IEEE Trans. Control Syst. Techn., vol. 4, no. 5, pp. 565-571., Sep., 1996 https://doi.org/10.1109/87.531922
  7. L. S. Stephens and Daegon Kim, 'A segmented arc selfbearing motor,' United States Patent Office-Technical Application, (Pending). Sep., 1999
  8. Stephens, L. S. and Kim, D. G., 'Analysis and simulation of a lorentz-type, slotless self-bearing motor,' Proc. of the 1st IFAC Conf. on Mechatronics, vol. II, pp. 463-468, Sep., 2000
  9. Steele, B. A. and Stephens, L. S., 'A test rig for measuring force and torque production in a Lorentz, Slotless self bearing motor,' Proc. 7th Int. Symp. Magnetic Bearings, pp. 407-412, Aug., 2000
  10. Hanselman, D. C., Brushless Permanent-Magnet Motor Design, McGraw-Hill Inc., 1994