Ultrasonic rotary motor using a longitudinal-torsional vibration converter

Author

Tsujino, Jiromaru ; Takeuchi, Masanobu ; Koshisako, Hiroshi

Author_Institution

Fac. of Eng., Kanagawa Univ., Yokohama, Japan

fYear

1992

Firstpage

887

Abstract

The characteristics of ultrasonic rotary motors using a converter from longitudinal to torsional vibration are studied. To obtain a rotary motor with large torque, ultrasonic motors using some types of slitted longitudinal-torsional converters are proposed. The longitudinal-torsion vibration converter consists of cylinders with a diagonally slitted vibration-converting part. Ultrasonic motors consist of such a converter with a driving part at its free edge and a rotor part clamped statically to a driving surface. The direction of rotation of these ultrasonic motors may be reversed using higher-order vibration modes. Maximum torques obtained are over 110 kgf-cm using a 40-mm-diameter converter and over 170 kgf-cm using a 50-mm-diameter converter. The maximum efficiency of a 50-mm-diameter motor was 17% when the output torque was 120 kgf-cm. The efficiency can be improved by installing piezoelectric ceramic disks or transducers within the longitudinally and/or torsionally vibrating converter part

Keywords

piezoelectric motors; 17 percent; large torque; longitudinal-torsional vibration converter; maximum efficiency; piezoelectric ceramic disks; ultrasonic rotary motors; Ceramics; Copper; Engine cylinders; Piezoelectric transducers; Resonance; Rotors; Springs; Torque converters; Ultrasonic transducers; Ultrasonic variables measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1992. Proceedings., IEEE 1992

Conference_Location

Tucson, AZ

Print_ISBN

0-7803-0562-0

Type

conf

DOI

10.1109/ULTSYM.1992.275844

Filename

275844