Design and analysis of a novel piezoelectric rotary motor with the cyclic symmetric stator : [a thesis presented in partial fulfilment of the requirements for the degree of] Master of Engineering in Mechatronics, School of Engineering and Advanced Technology, Massey University, New Zealand
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Date
2011
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Open Access Location
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Massey University
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Abstract
Piezoelectric motors have been widely employed since 1980s when the first commercial
model was invented. Various types of ultrasonic motors have been constructed and
manufactured. The piezoelectric motors have been noticed in the last few decades in
the field of autofocus cameras, miniature robotics and car applications due to the
significant mechanical characteristics such as light-weight, simplicity of design and
compact. The aim of this study is to design and analyze a novel piezoelectric rotary
motor with the cyclic symmetric stator. Hence, a novel cyclic symmetric stator design
with evenly-spaced protrusion fingers was developed. The natural frequencies and
mode structures of the cyclic symmetric stator was examined by using the finite element
method. The deformation relationship between stator disk and protrusion fingers in
repeat and split modes will be discussed in this article. Furthermore, this modeling study
focused more on displacement strength and deforming direction of the protrusion
fingertips using the Fourier coefficients. The piezoelectric buzzer was attached to the
cyclic symmetric stator prototype for driving the stator’s natural frequencies. An
experimental prototype is built to examine the consistency with the simulation results.
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Keywords
Piezoelectric devices, Design and construction, Ultrasonic motors