Two-dimensional finite element analysis of a synthetically loaded stator in a piezoelectrically driven ultrasonic motor

Authors: Üstündagˇ, Afsin; Ludwig, Reinhold; Levin, Peter L; Schmidt, Joachim; Hagedorn, Peter

Source: COMPEL: Int J for Computation and Maths. in Electrical and Electronic Eng., Volume 15, Number 1, 1996 , pp. 15-31(17)

Publisher: Emerald Group Publishing Limited

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Abstract:

Ultrasonic motors have attractive properties which compare favourably with electromagnetic motors for certain applications. Their operation is based on piezoelectrically exciting bending waves in the stator and transferring energy to the rotor via friction. Prototypes are typically constructed by trial and error; theoretical studies have proved to be difficult. Describes a two-dimensional model for the stator of a travelling wave ultrasonic motor. The authors have developed a finite element program that is capable of modelling piezoelectric driven systems in the time domain, and their objective is to simulate the excitation of the travelling waves in the stator. They are in fact able to simulate travelling waves. Although the plane strain model cannot account for all excitation modes, they observe the elliptical motion of the material particles on the surface, implying that rotor motion can be mechanically induced.

Keywords: Electrical Engineering; Electricity; Electricity Industry; Energy Industry; Utilities

Document Type: Research article

DOI: http://dx.doi.org/10.1108/03321649610120651

Publication date: 1996-01-01