超声波电动机
定子
材料科学
制作
转子(电动)
声学
振动
有限元法
脆弱性
超声波传感器
抗弯强度
结构工程
工程类
机械工程
复合材料
物理
医学
病理
物理化学
化学
替代医学
作者
Weishan Chen,Shengjun Shi,Yingxiang Liu,Pei Li
出处
期刊:IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control
[Institute of Electrical and Electronics Engineers]
日期:2010-05-01
卷期号:57 (5): 1160-1168
被引量:52
标识
DOI:10.1109/tuffc.2010.1528
摘要
To avoid the disadvantages of conventional traveling wave ultrasonic motors-lower efficiency PZT working mode of d 31 , fragility of the PZT element under strong excitation, fatigue of the adhesive layer under harsh environmental conditions, and low volume of the PZT material in the stator- a new type of traveling wave ultrasonic motor is presented in this paper. Here we implement the stator by nesting 64 PZT stacks in 64 slots specifically cut in a thick metal ring and 64 block springs nested within another 64 slots to produce preloading on the PZT stacks. In this new design, the d33 mode of the PZT is used to excite the flexural vibrations of the stator, and fragility of the PZT ceramics and fatigue of the adhesive layer are no longer an issue. The working principle, FEM simulation, fabrication, and performance measurements of a prototype motor were demonstrated to validate the proposed ideas. Typical output of the prototype motor is no-load speed of 15 rpm and maximum torque of 7.96 N·m. Further improvement will potentially enhance its features by increasing the accuracy in fabrication and adopting appropriate frictional material into the interface between the stator and the rotor.
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