一种方底座短柱超声波电机的设计

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摘要柱体超声波电机不仅具有低速大转矩、断电自持、响应快、无电磁干扰等良好特性,而且由于采用兰杰文振子,结构较为简单。为了提高其实用性,在设计过程中,支撑方式简单,易于生产,长度小成为重要的设计目标。提出了一种自由-固支振动模式的定子结构,长度直径比小,支撑部位位于定子方形底座的四角。分析了电机运行机理,并采用有限元法计算了周向不对称性对定子上端表面各节点轴向位移的影响。利用Labview对样机进行扫频,最后,利用PSV—400—M2型激光测振仪测量了定子振型及定子上端面质点的轴向振动幅值,其振型接近自由-固支振动模式,最大轴向振幅为1.96μm,仿真和测量数据表明方底座电机的设计是可行的。

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	王瑞霞
	金龙
	潘鹏
	董晓霄

关键词 ：柱体超声波电机, 方底座, 支撑方式, 自由-固定振动模式

Abstract：Cylindrical ultrasonic motor not only has many unique characteristics, such as high torque at low speed, high holding torque, rapid response and no magnetic interference, but also has simple structure by using langevin vibrator. In order to improve the practicability, simple support mode, easy production, and small length become important design objectives. A stator structure with free-fixed ends is designed which has small length to diameter ratio, and is fixed at four corners of the lower square base. Operating mechanism of the motor is analyzed, and effect of circumferential asymmetry on the longitudinal displacement of nodes at upper surface is calculated using finite element method. Impedance frequency characteristic curve of the stator is measured using the Labview. Vibration mode of the stator and axial vibration amplitude are measured using PSV-400-M2 laser vibrometer, the mode shape is close to the free-fixed vibration mode, and the maximum amplitude is up to 1.96μm. Computational and experimental results show that the design of the motor is feasible.

Key words： Cylindrical ultrasonic motor square-base support mode free-fixed vibration mode

收稿日期: 2014-08-20 出版日期: 2015-04-14

PACS:

TM356

基金资助:国家自然科学基金资助项目（51177014,51207021）

作者简介: 王瑞霞女,1979年生,讲师,博士研究生,研究方向为超声波电机结构设计及控制。金龙男,1965年生,教授,博士生导师,研究方向为超声波电机结构设计、驱动、伺服控制等方面的研究。

引用本文:

王瑞霞,金龙,潘鹏,董晓霄. 一种方底座短柱超声波电机的设计[J]. 电工技术学报, 2015, 30(2): 134-139. Wang Ruixia,Jin Long,Pan Peng,Dong Xiaoxiao. A Short Cylindrical Ultrasonic Motor With Square Base. Transactions of China Electrotechnical Society, 2015, 30(2): 134-139.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2015/V30/I2/134

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