Miniaturization of the traveling wave ultrasonic linear motor using series connection of bimorph transducers

Author

Kondo, Shuichi ; Koyama, Daisuke ; Nakamura, Kentaro

Author_Institution

Precision & Intell. Lab., Tokyo Inst. of Technol., Tokyo, Japan

fYear

2011

fDate

18-21 Oct. 2011

Firstpage

790

Lastpage

793

Abstract

Small-sized ultrasonic linear motors are demanded for replacing pneumatic actuators. We propose the structure of traveling wave ultrasonic linear motor less than 10 mm in diameter using series connection of bimorph transducers. The length of one bimorph transducer is determined to be 25 mm being based on finite element analysis for the resonance frequency of 66 kHz. A traveling wave of bending vibration is excited along the transmission bar with the superposition of two waves which have phase difference of ±90 degrees for each. The maximum thrust of 0.5 N was obtained.

Keywords

finite element analysis; linear motors; piezoelectric transducers; pneumatic actuators; ultrasonic motors; vibrations; bending vibration; bimorph transducer; finite element analysis; frequency 66 kHz; pneumatic actuator; resonance frequency; series connection; small-sized ultrasonic linear motor; transmission bar; traveling wave ultrasonic linear motor miniaturization; wave superposition; Acoustics; Friction; Resonant frequency; Surface waves; Transducers; Ultrasonic variables measurement; Vibrations; bimorph transducer; traveling wave; ultrasonic linear 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.2011.0193

Filename

6293521