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ID 49080
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Author
Yamaguchi, Daisuke
Abstract
In this study, a small ultrasonic motor driven under cryogenic temperature conditions has been fabricated and evaluated. Since transducer performance generally decreases at cryogenic temperatures, we designed and fabricated a bolt-clamped Langevin-type transducer for operation at cryogenic temperature. We simulated the influence of thermal stress on the transducer. The results from simulation were used to design the transducer, and it was then used to fabricate an ultrasonic motor for cryogenic temperature. The maximum diameter and the height of the motor are 30 mm and 38.7 mm. To enable the motor to be driven at cryogenic temperature, we evaluated the relationship between the contact pre-load and the lowest rotatable temperature. The motor's driving performance was evaluated at both room temperature and cryogenic temperatures. In a 4.5 K helium gas ambient, the rotation speed and starting torque were 133 rpm and 0.03 mu N m when the applied voltage was 50 Vp-p.
Keywords
Ultrasonic motor
Cryogenic environment
Piezoelectric transducer
Actuator
Published Date
2012-09
Publication Title
Sensors and Actuators A: Physical
Volume
volume184
Start Page
134
End Page
140
ISSN
0924-4247
Content Type
Journal Article
Official Url
http://dx.doi.org/10.1016/j.sna.2012.06.024
language
英語
Copyright Holders
(C) 2012 Elsevier B.V. All rights reserved.
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Refereed
True
DOI
Web of Sience KeyUT