Title :
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
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;
Conference_Titel :
Ultrasonics Symposium (IUS), 2011 IEEE International
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4577-1253-1
DOI :
10.1109/ULTSYM.2011.0193
