Magnetic Circuit Design Methodology of MR CDC Dampers for Semi-Active Suspensions

반능동 서스펜션용 MR CDC 댐퍼의 자기회로 설계기법

  • Park, Jae-Woo (Subdivision of Mechanical & Automotive Industry, Kyungnam College of Information & Technology) ;
  • Jung, Young-Dae (School of Mechanical Engineering, Yeungnam Univ.)
  • 박재우 (경남정보대학기계 자동차산업계열) ;
  • 정영대 (영남대학교 기계공학과)
  • Published : 2008.10.01

Abstract

MR Fluid, one of functional fluids, is developed for the application to automobile products. MR CDC damper using MR fluid has following principles. When ar electric current is applied to the solenoid, apparent viscosity of MR fluid passing through the annular gap which acts as magnetic circuits varies directly as the intensity of the current. These devices have a simple structure and excellent lime response characteristics, emerging as the alternatives of the conventional semi-active suspension systems. In this study, a design procedure of the magnetic circuit through the solenoid fore and the flux ring functioning as a magnetic path is investigated so as to optimize the design and performance of MR CDC dampers for the vehicles. In addition, an operating point on the B-H curve, the magnetization according to the variation in the annular gap, the pole piece width and the density of MR fluid are studied to design the optimal piston head within the restrained dimension range.

Keywords

References

  1. Park. J. and Jung. Y., "Phenomenological Damping Flow Modeling and Performance Evaluation for a Continuous Damping Control Damper Using MR Fluid," Journal of Korean Society of Precision Engineering, Vol. 25, No. 3, pp. 73-82, 2008
  2. An. J. and Kwon. D., "Modeling of a Magnetorheological Actuator including Magnetic Hysteresis," Journal of Intelligent Material System and Structures, Vol. 14, No. 9, pp. 541-550, 2003 https://doi.org/10.1177/104538903036506
  3. Rizzo, R., Sgambelluri, N., Scilingo, E., Raugi, M. and Bicchi, A., "Electromagnetic Modeling and Design of Haptic Interface Prototypes Based on Magnetorheological Fluid," IEEE Transactions on Magnetics, Vol. 43, No. 9, pp. 3586-3600, 2007 https://doi.org/10.1109/TMAG.2007.901351
  4. Lee. U., Kim. D., Hur. N. and Jeon. D., "Design Analysis and Experimental Evaluation of an MR Fluid Clutch," Journal of Intelligent Material System and Structures, Vol. 10, No. 9, pp. 701-707, 1999 https://doi.org/10.1106/EX6X-Y4QQ-XQ5L-8JJV
  5. Lee. H. and Choi. S., "Performance Evaluation of a Semi-Active Damper Using MR Fluid," in the proceeding of KSPE Spring Conference, pp. 497-498, 2007
  6. Nam. Y., Moon. Y., Park. M. and Lee. Y., "Electromagnetic Design Methodology for MR Fluid Actuator," Transaction of KSME A, Vol. 30, No. 10, pp. 1305-1313, 2006 https://doi.org/10.3795/KSME-A.2006.30.10.1305
  7. Lord Materials Division, "Magnetic Circuit Design," Lord Corporation Tech. Library, Engineering Note, pp. 1-10, 1999
  8. Lord Materials Division, "Magnetorheological Valve Configurations," Lord Corporation Tech. Library, Engineering Note, pp. 9-35, 2001
  9. Lord Materials Division, "Designing with MR Fluids," Lord Corporation Tech. Library, Engineering Note, pp. 9-50, 1999
  10. Cheng, D. K., "Fundamentals of Engineering Electro-magnetics," Addison-Wesley Series In Electrical Engineering, pp. 213-221, 1993
  11. Li, W., Du, H. and Guo, N., "Finite Element Analysis and Simulation Evaluation of a Magnetorheological Valve," International Journal of Advanced Manufacturing Technology, Vol. 21, No. 9, pp. 438-445, 2003 https://doi.org/10.1007/s001700300051