Title :
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
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;
Conference_Titel :
Ultrasonics Symposium (IUS), 2011 IEEE International
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4577-1253-1
DOI :
10.1109/ULTSYM.2011.0299
