文章摘要
路凯,周铁英,鹿存跃,刘涛,蔡海荣,易晓星.金属方柱压电片复合微型超声电机的研制[J].声学技术,2006,(3):262~266
金属方柱压电片复合微型超声电机的研制
A novel ultrasonic motor with quadrate bar
投稿时间:2005-11-29  
DOI:
中文关键词: 金属方柱  超声电机  压电片  弯曲旋转
英文关键词: quadrate bar  ultrasonic motor  piezoelectric plate  bend mode
基金项目:自然科学基金项目(50235010)
作者单位
路凯 清华大学物理系, 北京, 100084 
周铁英 清华大学物理系, 北京, 100084 
鹿存跃 清华大学物理系, 北京, 100084 
刘涛 清华大学物理系, 北京, 100084 
蔡海荣 中国科学院声学研究所, 北京, 100080 
易晓星 中国科学院声学研究所, 北京, 100080 
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中文摘要:
      研制了一款金属方柱压电片复合微型超声电机。相对于圆柱型电机,这种形式的电机的电场极化更充分,以及信号线的焊接更易实现。定子帽的材料用钢或铜。文中计算了整个电机定子换能器的模态和谐响应,理论上分析了不同方向转动惯量一致,可以形成椭圆运动的原理。实验测试了电机的共振频率、转速、转矩等。结果表明这款电机的自由共振频率约100kHz,无载转速可达到6000r/min以上,最大转矩可达60μNm以上,理论和实验基本一致。该电机具有很好的实用化前景。
英文摘要:
      A novel miniature ultrasonic motor is described.The stator consists of a quadrate metal bar and 4 piezoelectric plates.The metal bar uses brass with a dimension of 1.6×1.6×6.6mm3.The piezoelectric plates are made of PZT-4 and bonded to the sides of metal bar,all sized 1.6×6×0.3mm3 and polarized in the direction of thickness.Compared with traditional cylindrical ultrasonic motors,the quadrate cross-section motor makes polarization more sufficient,and signal wires easier to be welded.Modal and harmonic analysis of the stator is performed using FEM.The paper also shows the principle that inertial moments are equal in different directions of quadrate bar,so the motion trace of surface particle can be ellipse.Output characteristics of the USM is measured and compared with the FEM.The resonance frequency,maximum torque,and unloaded revolution are more than 100 kHz,60 μNm and 6000 rpm,respectively,basically in agreement with the theory.The miniature ultrasonic motor has potential applications.
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