AN AUTOMATED TEST SYSTEM FOR PIEZOELECTRI C MOTORS

Authors
Citation
A. Ferreira, AN AUTOMATED TEST SYSTEM FOR PIEZOELECTRI C MOTORS, Measurement science & technology, 7(4), 1996, pp. 666-679
Citations number
17
Language
FRANCESE
art.tipo
Article
Categorie Soggetti
Instument & Instrumentation",Engineering
ISSN journal
0957-0233
Volume
7
Issue
4
Year of publication
1996
Pages
666 - 679
Database
ISI
SICI code
0957-0233(1996)7:4<666:AATSFP>2.0.ZU;2-M
Abstract
This paper describes an automated test system for piezoelectric motors allowing the experimental characterization of its electromechanical b ehaviour. In the first part, an experimental method is given for evalu ation of losses generated in the different mechanisms of conversion: e lectric energy into ultrasonic vibrating energy and ultrasonic vibrati ng energy into mechanical energy of revolving motion. in the second pa rt, the present method is experimentally validated on a travelling-wav e-type rotary motor (Shinsei USR-60). The free stator vibration is ana lysed by a laser vibrometer which gives a picture both of amplitude an d of phase vibration. This result allows one to obtain an identificati on of vibrations modes and an evaluation of ultrasonic vibrating energ y and electromechanical efficiency. To characterize the working of the complete motor, the no-load working mode is first considered. The mea surement of its maximal mechanical characteristics (maximal no-load ro tating speed, maximal driving torque) with respect to axial load allow s the choice of optimum axial load. For this optimum value, the load w orking mode is, finally, investigated for the evaluation of load chara cteristics and conversion losses.