Jul, 2012
An Ultrasonic Motor for Use at Ultralow Temperature Using Lead Magnesium Niobate-Lead Titanate Single Crystal
JAPANESE JOURNAL OF APPLIED PHYSICS
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- Volume
- 51
- Number
- 7
- First page
- 07GE09-1-07GE09-6
- Last page
- Language
- English
- Publishing type
- Research paper (scientific journal)
- DOI
- 10.1143/JJAP.51.07GE09
- Publisher
- JAPAN SOC APPLIED PHYSICS
In this study, an ultrasonic motor for use at ultralow temperatures has been fabricated and evaluated. The motor has a bolt-clamped Langevin-type transducer using lead magnesium niobate-lead titanate (PMN-PT) single crystal. The transducer is proposed as an oscillator for use at ultralow temperatures by simulation of the thermal stress and evaluation of the pre-load. The thermal effect of the transducer was evaluated when the temperature was changed. As a result, the pre-load of the transducer was concluded to be affected by thermal stress. In addition, the ultrasonic motor using the transducer was fabricated and evaluated. By adjusting the contact pre-load between the rotor and the transducer, the motor has successfully rotated at an ultralow temperature. The rotation speed was 144 rpm at 4.4 K when the applied voltage was 150 Vp-p. This rotation speed is larger than that of previous same size actuators that can be used at ultralow temperatures. (C) 2012 The Japan Society of Applied Physics
- Link information
- ID information
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- DOI : 10.1143/JJAP.51.07GE09
- ISSN : 0021-4922
- Web of Science ID : WOS:000307925800076