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Jo, Wook
Sustainable Functional Ceramics Lab
Research Interests
  • Lead-free piezoceramics, ultra - low temperature sintering, ferroelectrics, relaxor ferroelectrics, 2D materials, magnetoelectric materials, multiferroics

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Ring-Type Rotary Ultrasonic Motor Using Lead-free Ceramics

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Title
Ring-Type Rotary Ultrasonic Motor Using Lead-free Ceramics
Author
Hong, Chang-HyoHan, Hyoung-SuLee, Sae-ShinWang, KeYao, Hang-ZhouLi, Jing-FengGwon, Jung-HoQuyet, Nguyen VanJung, Jin-KyungJo, Wook
Issue Date
2015-07
Publisher
한국센서학회
Citation
JOURNAL OF SENSOR SCIENCE AND TECHNOLOGY, v.24, no.4, pp.228 - 231
Abstract
Ultrasonic motors provide high torques and quick responses compared to their magnetic counterparts; therefore, they are widely used in small-scale applications such as mobile phones, microrobots, and auto-focusing modules in digital cameras. To determine the feasibility of lead-free piezoceramics for ultrasonic motor applications, we fabricated a ring-type piezoceramic with a KNN-based lead-free piezoceramic (referred to as CZ5), intended for use in an auto-focusing module of a digital camera. The vibration of the lead-free stator was observed at 45.1kHz. It is noteworthy that the fully assembled lead-free ultrasonic motor exhibited a revolution speed of 5-7 rpm, even though impedance matching with neighboring components was not considered. This result suggests that the tested KNN-based piezoceramic has great potential for use in ultrasonic motor applications, requiring minimal modifications to existing lead-based systems.
URI
https://scholarworks.unist.ac.kr/handle/201301/20619
DOI
1225-5475/eISSN2093-7563
ISSN
1225-5475
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