Piezoelectric ultrasonic motor using longitudinal-torsional composite resonance vibration.

Piezoelectric ultrasonic motor using longitudinal-torsional composite resonance vibration. Research Abstract Details 

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Piezoelectric ultrasonic motor using longitudinal-torsional composite resonance vibration. Abstract Text:

O Ohnishi,O Myohga,T Uchikawa,M Tamegai,T Inoue,S Takahashi,

A piezoelectric ultrasonic motor, which uses longitudinal and torsional composite vibration, is examined in order to obtain high torque characteristics with small diameter. Piezoelectric ceramic elements, oscillating in both longitudinal and torsional modes, respectively, are used as piezoelectric stiffened modes having high electromechanical coupling factors k(33) and k(15), respectively. It is found that the resonant frequencies for longitudinal mode and torsional mode could coincide with each other in the ultrasonic motor, according to finite element method analysis and experimental measurement. The motor operating in both resonant vibrations indicated good performance. The 20-mm diameter motor exhibited 4 kgfcm maximum torque, 450 r/min maximum rotational speed, 40% maximum efficiency, and quick responsiveness, within 2.5 ms.

Piezoelectric ultrasonic motor using longitudinal-torsional composite resonance vibration. Publishing Authors By Initials

O Ohnishi,O Myohga,T Uchikawa,M Tamegai,T Inoue,S Takahashi,

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Piezoelectric ultrasonic motor using longitudinal-torsional composite resonance vibration. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: IEEE transactions on ultrasonics, ferroelectrics,

VOLUME: 40

Page Numbers: 687-93

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ISSN: 0885-3010

DAY: 11

MONTH: 02

YEAR: 1993

Piezoelectric ultrasonic motor using longitudinal-torsional composite resonance vibration. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Piezoelectric ultrasonic motor using longitudinal-torsional composite resonance vibration.

AFFILIATION: NEC Corp., Kawasaki.

Country: United States

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MEDLINETA: IEEE Trans Ultrason Ferroelect

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