Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지

New Development of Hexahedral Type Vibration Motor Used for Mobile Phones

  • Hwang, Gun-Yong (School of Mechanical Engineering, Pusan National University) ;
  • Hwang, Sang-Moon (School of Mechanical Engineering, Pusan National University) ;
  • Chung, Shi-Uk (School of Mechanical Engineering, Pusan National University) ;
  • Kang, Beom-Soo (Department of Aerospace Engineering, Pusan National University) ;
  • Hwang, I-Cheol (Division of Mechanical and Industrial System Engineering, Dong-eui University)
  • Published : 2002.08.01
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Abstract

Mobile communication industry powered by electronics and information technology is building a transforming way for human communication. The latest electronics is so saturated to forget the difficulty in size reduction of electronic parts. However, mechanical parts, such as dynamic speakers and vibration motors, are intrinsically not easy to realize size reduction due to their construction. In this paper, a hexahedral type with simpler configuration is introduced to substitute for the conventional vibration motors. For uneven magnetic field analysis of the hexahedral type, FEM was used to determine magnetic flux density. After an analysis of magnetic and mechanical characteristics, it is shown that the coil configuration is the most important parameter to increase the output torque, and thus vibration. For optimization, genetic algorithm is used to find the optimal configuration of coil to maximize the output torque. Experimental results are also followed to confirm the validity of the proposed design.

Keywords

References

  1. Alhamadi, M. and Demerdash, N., 1994, 'Three Dimensional Magnetic Field Computation by a Coupled Vector-Scalar Potential Method in Brushless DC Motors with Skewed Permanent Magnet Mounts-the-No-Load and Load Results,' IEEE Trans. Energy Conversion, Vol. 9, No. 1, pp. 15-22 https://doi.org/10.1109/60.282472
  2. Jang, G. H. and Lieu, D. K., 1996, 'Analysis of the Magnetic Force and the Torque in a Brushless DC Motor,' KSME International Journal, Vol. 10, No. 1, pp. 37-48
  3. Liu, Z. J., Bi, C, Tan, H.C. and Low, T-S., 1994, 'Modeling and Torque Analysis of Permanent Magnet Spindle Motor for Disk Drive Systems,' IEEE Trans. Magnetics, Vol. 30, No. 6, pp. 4317-4319 https://doi.org/10.1109/20.334073
  4. Wurtz, F., Richomme, M., Bigeon, J. and Sabonnadiere, C, 1997, 'A Few Results for using Genetic Algorithms in the Design of Electrical Machines,' IEEE Transactions on Magnetics, Vol. 33, No. 2, pp. 1892-1895 https://doi.org/10.1109/20.582656