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Appl. Sci. 2015, 5(3), 472-484;

A Novel Rotary Piezoelectric Motor Using First Bending Hybrid Transducers

State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150001, China
State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science & Technology, Wuhan 430074, China
Author to whom correspondence should be addressed.
Academic Editor: Sheng-Yuan Chu
Received: 17 July 2015 / Revised: 18 August 2015 / Accepted: 18 August 2015 / Published: 27 August 2015
(This article belongs to the Special Issue Ferroelectric Ceramics)
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We report a novel rotary piezoelectric motor using bending transducers in this work. Three transducers are used to drive a disk-shaped rotor together by the elliptical movements of their driving tips; these motions are produced by the hybrid of two first bending vibration modes. The proposed piezoelectric transducer has a simple structure as it only contains an aluminum alloy beam and four pieces of PZT plates. Symmetrical structure is the only necessary condition in the design process as it will ensure the resonance frequencies of the two orthogonal first bending modes are equal. Transducers with first bending resonance frequency of about 53 kHz were fabricated and assembled into a rotary motor. The proposed motor exhibits good performance on speed and torque control. Under a working frequency of 53.2 kHz, the maximum no-load speed and the maximum torque of the prototype are tested to be 53.3 rpm and of 27 mN·m. View Full-Text
Keywords: piezoelectric motor; rotary; bending transducer; multi-feet-driving piezoelectric motor; rotary; bending transducer; multi-feet-driving

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Liu, Y.; Xu, D.; Yu, Z.; Yan, J.; Yang, X.; Chen, W. A Novel Rotary Piezoelectric Motor Using First Bending Hybrid Transducers. Appl. Sci. 2015, 5, 472-484.

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