Design and evaluation of ultrasonic motor located in cryogenic temperature environments

Author

Yamaguchi, Daisuke ; Kanda, Takefumi ; Suzumori, Koichi

Author_Institution

Grad. Sch. of Natural Sci. & Technol., Okayama Univ., Okayama, Japan

fYear

2011

fDate

18-21 Oct. 2011

Firstpage

1214

Lastpage

1217

Abstract

An ultrasonic motor driven in the cryogenic temperature environment has been designed, fabricated and evaluated. This motor has bolt-clamped Langevin-type transducer. The maximum diameter and length of the motor are 22 mm and 30.5 mm. The aim of this paper is to evaluate the specification of this motor at cryogenic temperature. By estimating the thermal stress of the transducer and adjusting the contact pre-load between the rotor and the transducer, we have succeeded in driving the motor into cryogenic helium gas. The rotation speed of the motor was evaluated at cryogenic temperature. The rotation speed was 65.4 rpm at 4.5 K.

Keywords

cryogenics; helium; thermal stresses; ultrasonic motors; ultrasonic transducers; bolt-clamped Langevin-type transducer; contact pre-load; cryogenic helium gas; cryogenic temperature environments; rotor; size 22 mm; size 30.5 mm; temperature 4.5 K; thermal stress; ultrasonic motor design; ultrasonic motor evaluation; Acoustics; Cryogenics; Rotors; Temperature sensors; Transducers; Vibrations; Actuator; Cryogenic Temperature; Piezoelectric transducer; Ultrasonic Motor;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium (IUS), 2011 IEEE International

Conference_Location

Orlando, FL

ISSN

1948-5719

Print_ISBN

978-1-4577-1253-1

Type

conf

DOI

10.1109/ULTSYM.2011.0299

Filename

6293431