Novel piezoelectric rotary motor driven by a single-phase sine wave with an asymmetric stator

This study demonstrates a new approach for constructing a rotary piezoelectric motor that utilizes an asymmetric stator driven by a single-phase signal. An asymmetric stator with four driving feet is proposed on the basis of the idea of generating asymmetric action on the rotor. This new motor consi...

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Bibliographic Details
Published in:Review of scientific instruments 2019-07, Vol.90 (7), p.075006-075006
Main Authors: Pan, Qiaosheng, Hu, Jinsheng, Miao, Enming, Chen, Suxin, Shu, Shuangbao, Hu, Penghao, Huang, Bin
Format: Article
Language:English
Subjects:
Anchors
Asymmetry
Finite element method
Piezoelectric motors
Piezoelectricity
Prototypes
Scientific apparatus & instruments
Sine waves
Stators
Vibration analysis
Vibration measurement
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Summary:This study demonstrates a new approach for constructing a rotary piezoelectric motor that utilizes an asymmetric stator driven by a single-phase signal. An asymmetric stator with four driving feet is proposed on the basis of the idea of generating asymmetric action on the rotor. This new motor consists of one piezoelectric transducer with two anchors and four driving feet placed in a parallelogram and internally connected to a circular rotor. The four feet vibrate asymmetrically to push the rotor into motion in one direction when a preload is applied. The proposed motor is designed, analyzed, and tested by using a finite element method (FEM). The vibration and impedance characteristics of the stator are measured after fabricating a prototype, and the test results are consistent with the FEM analysis results. The typical output of the prototype is a no-load speed of 176.5 rpm and a maximum torque of 29.4 N mm at an excitation voltage of 274 Vp-p.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.5094798