Design of an ultrasonic motor with multi-vibrators

作     者：Chong LI Cun-yue LU Yi-xin MA Shi-yang LI Wei-qing HUANG Chong LI;Cun-yue LU;Yi-xin MA;Shi-yang LI;Wei-qing HUANG

作者机构：Department of Instrument Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China Precision Driving Lab Nanjing University of Aeronautics and Astronautics Nanjing 210016 China 

基　　金：Project supported by the National Natural Science Foundation of China (No. 11174206)  the Open Fund of State Key Laboratory of Ocean Engineering (No. 0507)  and the Shanghai Aerospace Science and Technology Innovation Fund (No. 201347)  China 

出 版 物：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 (浙江大学学报（英文版）A辑（应用物理与工程）)

年 卷 期：2016年第17卷第9期

页      码：724-732页

摘      要：This paper presents and verifies a new idea for constructing an ultrasonic motor （USM）. The stator contains several vibrators fabricated by bonding piezoelectric ceramics （PZTs） to a metal base. When two alternating current （AC） voltages with a 90° phase difference are applied to the PZTs, longitudinal and bending modes are excited in the vibrator. The bending vibrations of the vibrators are stacked to form the torsional vibration of the stator, ultimately generating longitudinal-torsional composite vibration. Both vibrators and the stator are excited to the resonance state. A standing wave is formed by superposition of longitudinal and torsional modes. The proposed motor is an in-plane vibration motor because the vibrations of the stator are in the circumferential plane. The finite element method （FEM） is used to validate the feasibility of the proposed motor. The fabricated stator contains five vibrators. The tested resonance frequencies of longitudinal and torsional modes are 44.42 kHz and 43.83 kHz, respectively. The stall torque is 0.3 N＇m and no-load speed is 45 r/min. The highest efficiency is 30%. The applied driving voltage is 100 Vo.p （peak voltage） at 43.9 kHz. The designed motor is a parallel-actuated integral motor. It allows the vibrators to operate synchronously, and overcomes asynchronous issues that occur in traditional multi-vibrator motors.

主 题 词：Ultrasonic motor (USM) Standing wave In-plane vibration Multi-vibrator 

学科分类：0401[教育学-教育学类] 04[教育学] 

核心收录：

D　O　I：10.1631/jzus.A1500316

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