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등가자화전류를 이용한 최적코일형상 설계방법

Optimal Coil Configuration Design Methodology Using the Concept of Equivalent Magnetizing Current

  • 김우철 (서울대학교 대학원 기계항공공학부) ;
  • 김민태 (서울대학교 대학원 기계항공공학부) ;
  • 김윤영 (서울대학교 기계항공공학부)
  • 발행 : 2007.01.01

초록

A new electric coil design methodology using the notion of topology optimization is developed. The specific design problem in consideration is to find optimal coil configuration that maximizes the Lorentz force under given magnetic field. Topology optimization is usually formulated using the finite element method, but the novel feature of this method is that no such partial differential equation solver is employed during the whole optimization process. The proposed methodology allows the determination of not only coil shape but also the number of coil turns which is not possible to determine by any existing topology optimization concept and to perform single coil strand identification algorithm. The specific applications are made in the design of two-dimensional fine-pattern focusing coils of an optical pickup actuator. In this method, the concept of equivalent magnetizing current is utilized to calculate the Lorentz force, and the optimal coil configuration is obtained without any initial layout. The method is capable of generating the location and shape of turns of coil. To confirm the effectiveness of the proposed method in optical pickup applications, design problems involving multipolar permanent magnets are considered.

키워드

참고문헌

  1. Simkin, J. and Trobridge, C. W., 1991, 'Optimization Problem in Electromagnetics,' IEEE Trans. Magn., Vol. 27, No.5, pp. 4016-4019 https://doi.org/10.1109/20.104982
  2. Byun, J. K. and Hahn, S. Y., 1999, 'Topology Optimization of Electrical Devices Using Mutual Energy and Sensitivity,' IEEE Trans. Magn., Vol. 35, No.5, pp. 3718-3720 https://doi.org/10.1109/20.800642
  3. Kitamura, M., Kakukawa, S., Mori, K. and Tominaka, T., 1994, 'An Optimal Design Technique for Coil Configurations in Iron-Shielded MRI Magnets,' IEEE Trans. Magn., Vol. 30, No.4, pp. 2352-2355 https://doi.org/10.1109/20.305748
  4. Nishimura, K., Nakata, S. and Nakagawa, T., 1997, 'Optimization of the Coil Distribution in Deflection Yoke for CRT,' IEEE Trans. Magn., Vol. 33, No.2, pp. 1848-1851 https://doi.org/10.1109/20.582642
  5. Kim, W., Kim, J. E. and Kim, Y. Y., 2005, 'Coil Configuration Design for the Lorentz Force Maximization by the Topology Optimization Method: Applications to Optical Pickup Coil Design,' Sens. Actuators: Phys. A, Vol. 121, pp. 221-229 https://doi.org/10.1016/j.sna.2005.01.042
  6. Kim, W., Kim, J. E., and Kim, Y. Y., 2005, 'Two-Phase Optimization for the Design of Multiple Coils,' IEEE Trans. Magn., Vol. 41, No. 10, pp. 4093-4095 https://doi.org/10.1109/TMAG.2005.854895
  7. Dyck, D. N. and Lowther, D. A., 1996, 'Automated Design of Magnetic Devices by Optimizing Material Distribution,' IEEE Trans. Magn., Vol. 32, No. 2, pp. 1188-1192 https://doi.org/10.1109/20.497456
  8. Kabashima, T., Kawahara, A. and Goto, T., 1988, 'Force Calculation Using Magnetizing Current,' IEEE Trans. Magn., Vol. 24, No. 1, pp. 451-454 https://doi.org/10.1109/20.43954
  9. Henneberg, G., Sattler, K. and Shen, D., 1992, 'Nature of the Equivalent Magnetizing Current for the Force Calculation,' IEEE Trans. Magn., Vol. 28, No. 2, pp. 1068-1071 https://doi.org/10.1109/20.123866
  10. Bendsoe, M. P. and Sigmund, O., 2001, 'Design of Multiphysics Actuators Using Topology Optimization - Part II: Two-Material Structure,' Comput. Methods Appl. Mech. Eng., Vol. 190, pp. 6605-6627 https://doi.org/10.1016/S0045-7825(01)00252-3