一种基于压电叠堆的微型直线超声波电动机研究  

Research of a Miniature Linear Ultrasonic Motor Based on Piezoelectric Stack

作　　者：汪红兵[1] 李志荣[1,2] 孙春华 WANG Hong-bing;LI Zhi-rong;SUN Chun-hua(Suzhou Vocational University,Suzhou 215104,China;Hohhot Vocational College,Hohhot 010051,China)

机构地区：[1]苏州市职业大学,苏州215104 [2]呼和浩特职业学院,呼和浩特010051

出　　处：《微特电机》2018年第6期27-30,共4页Small & Special Electrical Machines

基　　金：国家自然科学基金资助项目(50875181);"青蓝工程"资助项目

摘　　要：对已有的直线超声波电动机进行改进,研究了一种新的微型直线超声波电动机,采用了压电叠堆,具有低驱动电压、结构简单、装配方便的特点。压电叠堆通过自主设计完成。电机定子使用对称和反对称模态作为工作模态,在ANSYS软件中使用有限元方法分析了电机定子的对称和反对称2种模态频率对其结构参数的灵敏度,并对其进行调整,以使得定子的对称和反对称模态频率保持一致。对电机定子进行了模态测试,实验结果与理论分析基本一致。对样机进行了性能实验,当实验条件为激励电压15 V、频率38 k Hz时,样机的无负载最大速度为30 mm/s,最大推力为2.2 N。通过微型化改进,电机定子最大推重比从97 N/kg增加到157 N/kg。To improve the existing linear ultrasonic motor,a novel linear ultrasonic motor which was based on piezoelectric stack was proposed,and the motor had the characteristics of low drive voltage,simple structure and convenient assembly. The piezoelectric stack used in the motor was completed by independent design. The symmetric and anti-symmetric mode were utilized as operating modes. The finite element method was used to analyze the symmetric and anti-symmetric mode frequency to all structure parameters in ANSYS software and the frequency consistency of the symmetric and anti-symmetric mode was adjusted. The mode testing showed that the experimental results were consistent with the theoretical results. The performance testing of the motor showed that the motor could offer the maximum velocity of 30 mm/s and the maximum thrust force of 2.2 N in the condition of driving voltage 15 V,frequency 38 k Hz. After miniaturization improvement,the maximal thrust force per unit weight of the motor was increased from 97 N/kg to 157 N/kg.

关 键 词：直线超声波电动机 灵敏度 微型化 

分 类 号：TM359.4[电气工程—电机]