Presentations

Oct 20, 2014

Evaluation of thermal stress of transducers for cryogenic ultrasonic motors

IEEE International Ultrasonics Symposium, IUS
  • Yuya Noguchi
  • ,
  • Daisuke Yamaguchi
  • ,
  • Takefumi Kanda
  • ,
  • Koichi Suzumori

Event date
Oct 20, 2014 - Oct 20, 2014
Language
English
Presentation type
Organizer
IEEE Computer Society

An ultrasonic motor which can be driven at the condition from room temperature to cryogenic temperature has been designed, fabricated and evaluated. This motor has a bolt-clamped Langevin-type transducer which is suitable for cryogenic temperature. The aim of this paper is to evaluate the thermal stress of transducers. Each transducer is made of materials which had different thermal expansion coefficient, such as stainless, Ti, or invar. The thermal stress in the transducer made of Ti was the smallest. The rotation speed of the motor using the transducer made of Ti was evaluated at cryogenic temperature. The rotation speed was 1102 rpm at 4.6 K when the applied voltage was 100 V&lt
inf&gt
p-p&lt
/inf&gt
.

Link information
DOI
https://doi.org/10.1109/ULTSYM.2014.0625