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Characteristics of π-shaped Ultrasonic Motor
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 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;
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In this paper, the design and characteristics of a 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 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.
Auto-focusing;Miniaturized motor;Optical zooming; USM;
 Cited by
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