Characteristics of π-shaped Ultrasonic Motor

Title & Authors
Characteristics of π-shaped Ultrasonic Motor
Lim Kee-Joe; Park Seong-Hee; Yun Yong-Jin; Park Cheol-Hyun; Kang Seong-Hwa; Lee Jong-Sub;

Abstract
In this paper, the design and characteristics of a $\small{\pi-shaped}$ ultrasonic motor that is applicable to optical zoom operation of a lens system for mobile phones are investigated. Its design and simulation of performances are carried out by FEM (finite element method) commercial software. As a simulation result, by applying voltage with single phase, a combined vibration is produced at the surface of a stator arm. A prototype of the motor is fabricated and its outer size is $\small{8*4*2mm^3}$ including the cylindrical steel rod of 2 mm in diameter as the rotor. The motor exhibits a maximum speed of 500 rpm and a power consumption of 0.3 W when driven at 20 Vpp and 64 kHz.
Keywords
Auto-focusing;Miniaturized motor;Optical zooming;$\small{\pi-shaped}$ USM;
Language
English
Cited by
1.
Analysis of a nanopositioning actuator using numerical and analytic methods, Smart Materials and Structures, 2008, 17, 2, 025025
2.
Characteristic analysis of a traveling wave ultrasonic motor using an ellipsoidal static contact model, Smart Materials and Structures, 2009, 18, 11, 115024
References
1.
H. Hata, JJAP, 35, 5023 (1996)

2.
Yoshiaka Hata and Yasuhiro Okamoto, 'Linear Actuator', US Patent, Pub. No. US 200310222538, pp. 1 - 12,2003

3.
Koc Burhanettin, Aydin Dogan, Yuan Xu, Robert E. Newnham, and Kenji Uchino, 'An Ultrasonic Motor Using a Metal-Ceramic Composite Actuator Generating Torsional Displacement', Jpn. J. Appl. Phys., Vol. 37, No. 10,5659-5662, 1998

4.
Kentaro Nakamura, Jacques Margairaz, Takaaki Ishii, and Sadayuki Ueha, 'Ultrasonic Stepping Motor Using Spatially Shifted Standing Vibrations', IEEE Trans. On UFFC, Vol. 44, No. 4, pp. 823 - 827, 1997

5.
Faa-Jeng Lin, 'Fuzzy Adaptive Model-Following Position Control for Ultrasonic Motor', IEEE Trans. On Power Electronics, Vol. 12, No. 2, pp. 261-268, 1997

6.
Toshiiku Sashida, Takashi Kenjo, 'An Introduction to Ultrasonic Motor', CLARENDON PRESS, pp. 92-93, 1993

7.
K.J. Lim, O.D. Kwon, C.H. Park, J.S. Lee, and S.H. Kang, 'The Design and Characteristics of a Novel Ultrasonic Motor', Proc. On Materials 2005, Aveiro, Portugal (2005), pp. 125