基于压电叠层振动的一种直线电机的设计  

Design of a Linear Motor Based on Vibration of Piezoelectric Stack

作　　者：陈西府[1,2] 徐晶晶[2] 王寅[2] 黄卫清[2] 周海[1] 

机构地区：[1]盐城工学院机械工程学院,盐城224051 [2]南京航空航天大学机械结构强度与振动国家重点实验室,南京210016

出　　处：《机械设计与制造》2012年第7期58-60,共3页Machinery Design & Manufacture

基　　金：国家自然科学基金重点项目(50735002);盐城工学院面上科研项目(XKY2011016)

摘　　要：设计了一种利用压电叠层的微幅振动的新型压电直线电机。分析了非共振状态下电机的工作机理,设计了电机的定子结构和总体结构。利用有限元软件对驱动足进行仿真分析,得到了柔性结构的最佳尺寸。制作了样机并进行测试,试验表明电机的运行速度随激励频率和激励电压的增加而增加,且在一定阈值内近似成线性关系。当驱动电压峰峰值为100 V、频率为1.6 kHz时,电机的空载速度可达2.8 mm/s,最大推力可达3.5 N。该电机工作频带宽、驱动电压低,对电机的结构精度和加工精度要求不高。A new type of linear motor based on the micro-vibration of piezoelectric stacks was presented.And the working mechanism of the motor under non-resonance was analyzed.Then the stator structure and overall structure of motor was designed.Further,the best size of the flexible structures was obtained by means of finite element analysis method on drive foot.And the prototype was manufactured and tested.It can be seen that the velocity of the motor increases with the enhancing of the exciting voltage and exciting frequency.What＇s more,it tends to be approximately linear in a certain range.The no-load speed is 2.8mm/s and the thrust is 3.5N when the peak value of the drive voltage is 100V at 1.6kHz.The motor can work steadily in a wide frequency range with low drive voltage with low requirement in precision of structure and manufacturing.

关 键 词：直线电机 压电叠层 非共振 单驱动足 结构设计 

分 类 号：TH12[机械工程—机械设计及理论] TM359.4[电气工程—电机]