Full Text:
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CLC number: TM356
On-line Access: 2012-02-27
Received: 2011-08-19
Revision Accepted: 2011-10-24
Crosschecked: 2012-02-07
Cited: 7
Clicked: 5349
A rotary ultrasonic motor using radial bending mode of ring with nested PZT excitation
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Ying-xiang Liu, Jun-kao Liu, Wei-shan Chen, Xiao-hui Yang. A rotary ultrasonic motor using radial bending mode of ring with nested PZT excitation[J]. Journal of Zhejiang University Science A, 2012, 13(3): 189-196.
@article{title="A rotary ultrasonic motor using radial bending mode of ring with nested PZT excitation",
author="Ying-xiang Liu, Jun-kao Liu, Wei-shan Chen, Xiao-hui Yang",
journal="Journal of Zhejiang University Science A",
volume="13",
number="3",
pages="189-196",
year="2012",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1100225"
}
%0 Journal Article
%T A rotary ultrasonic motor using radial bending mode of ring with nested PZT excitation
%A Ying-xiang Liu
%A Jun-kao Liu
%A Wei-shan Chen
%A Xiao-hui Yang
%J Journal of Zhejiang University SCIENCE A
%V 13
%N 3
%P 189-196
%@ 1673-565X
%D 2012
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1100225
TY - JOUR
T1 - A rotary ultrasonic motor using radial bending mode of ring with nested PZT excitation
A1 - Ying-xiang Liu
A1 - Jun-kao Liu
A1 - Wei-shan Chen
A1 - Xiao-hui Yang
J0 - Journal of Zhejiang University Science A
VL - 13
IS - 3
SP - 189
EP - 196
%@ 1673-565X
Y1 - 2012
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A1100225
Abstract: This study presents and verifies a new idea for constructing a rotary traveling wave ultrasonic motor (USM) that uses the radial bending mode of a ring. In the new design, 20 trapezoid cross section slots are cut symmetrically in the outer surface of a thick duralumin alloy ring, where 20 PZT stacks are nested. In each slot, two wedging blocks are set between the PZT stack and the two sides of the slot respectively to apply preloading on the PZT ceramics. Two radial bending modes of the stator that have a phase difference of a quarter wavelength on space are generated by using the d33 operating mode of the PZT elements, and then a flexural traveling wave is formed by the superimposing of two standing waves whose amplitudes are equal and phases are different by 90° temporally. Two conical rotors are pressed to each end of the ring type stator by a coiled spring. The finite element method (FEM) simulation is developed to validate the feasibility of the proposed motor. The maximal speed and torque of the prototype are tested to be 126 r/min and 0.8 N·m, respectively.
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