Journal of Electrical Engineering and Technology

  • 제1권1호
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  • Pages.106-109
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  • 2006
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  • 1975-0102(pISSN)
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  • 2093-7423(eISSN)
대한전기학회 (The Korean Institute of Electrical Engineers)
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Characteristics of a Miniaturized Ultrasonic Motor for Auto-focusing of a Mobile Phone

  • Lim Kee-Joe (Dept. of Electrical Engineering and Computer Science, Chungbuk Nat'l University) ;
  • Lee Jong-Sub (Testing and Research team) ;
  • Kang Seong-Hwa (Dept. of Fire Prevention and Safety, Chungcheong University)
  • 발행 : 2006.03.01
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초록

In this paper, the design and characteristics of a novel ultrasonic motor are investigated. Such a motor is appropriate far use in the optical zoom or auto focusing functions of the lens system in mobile phones. Its design and simulation of performances are carried out by FEM commercial software (ATILA). The shape of the motor is similar to a square without one side, on which an optical lens can be mounted. Two sheets of piezoelectric ceramics are adhered to both sides of two legs of the elastic body, respectively To drive the ultrasonic motor, the voltage is applied to two sheets of piezoelectric ceramics bonded to one leg. The rotation direction can be easily changed by switching the piezoelectric sheets bonded to the other leg, to which voltage is applied. A proto type of the motor is fabricated and its outer size is $10^*10^*2[mm3]$ including the camera lens of which the diameter is 7.5(mm). Its power consumption is about 0.3[W] and the speed of rotation is adjustable from 10 to 200[rpm] according to the applied voltage

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참고문헌

  1. Yoshiaka Hata et al., 'Linear Actuator', US Patent, Pub. No. US 2003/0222538, pp. 1 - 12, 2003
  2. Burhanettin KOC, et al., 'An Ultrasonic Motor Using a Metal-Ceramic Composite Actuator Generating Torsional Displacement', Jpn. J. Appl. Phys., Vol. 37, No. 10, 5659-5662, 1998 https://doi.org/10.1143/JJAP.37.5659
  3. Kentaro Nakamura, et al., 'Ultrasonic Stepping Motor Using Spatially Shifted Standing Vibrations', IEEE Trans. On UFFC, Vol. 44, No.4, pp. 823 - 827, 1997 https://doi.org/10.1109/58.655198
  4. Faa-Jeng Lin, 'Fuzzy Adaptive Model-Following Position Control for Ultrasonic Motor', IEEE Trans. On PE, Vol. 12, No. 2, pp. 261 - 268, 1997
  5. Kee-Joe Lim, Jong-Sub Lee, The transactions of KIEE, 49 (3), 155 (2000)
  6. Kee-Joe Lim, Jong-Sub Lee, Trans. on electrical and electronic materials, 5 (2), 76 (2004) https://doi.org/10.4313/TEEM.2004.5.2.076
  7. Toshiiku Sashida, et al., 'An Introduction to Ultrasonic Motor', CLARENDON PRESS, pp. 92-93, 1993

피인용 문헌

  1. Fabrication and characteristics of impact type ultrasonic motor vol.27, pp.13-15, 2007, https://doi.org/10.1016/j.jeurceramsoc.2007.02.125
  2. An auto-focus lens actuator using ionic polymer metal composites: Design, fabrication and control vol.13, pp.10, 2012, https://doi.org/10.1007/s12541-012-0247-4
  3. A Novel Ultrasonic Motor Using Orthogonal Bimorphs vol.43, pp.4, 2007, https://doi.org/10.1109/TMAG.2007.891395