DocumentCode
2858671
Title
Piezoelectric ultrasonic motor using longitudinal-torsional composite vibration of a cylindrical resonator
Author
Ohnishi, O. ; Myohga, O. ; Uchikawa, T. ; Tamegai, M. ; Inoue, T. ; Takahashi, S.
Author_Institution
NEC Corp., Kawasaki, Japan
fYear
1989
fDate
3-6 Oct 1989
Firstpage
739
Abstract
A piezoelectric ultrasonic motor, which uses longitudinal and torsional composite vibration of a cylindrical resonator, was investigated. It was found that the resonant frequencies for longitudinal mode and torsional mode could coincide with each other in the cylindrical resonator, according to finite element analysis and experimental measurement. The motor using both resonant vibrations showed good performance. The 20-mm-diameter motor exhibited a 4 kgf-cm maximum torque, a 450-r.p.m maximum rotational speed, and a 40% maximum efficiency
Keywords
electric motors; piezoelectric devices; small electric machines; ultrasonic devices; cylindrical resonator; finite element analysis; longitudinal mode; piezoelectric ultrasonic motor; torsional composite vibration; torsional mode; Ceramics; Couplings; Finite element methods; Piezoelectric polarization; Pressing; Resonant frequency; Rotors; Stators; Torque; Vibrations;
fLanguage
English
Publisher
ieee
Conference_Titel
Ultrasonics Symposium, 1989. Proceedings., IEEE 1989
Conference_Location
Montreal, Que.
Type
conf
DOI
10.1109/ULTSYM.1989.67085
Filename
67085
Link To Document