一种新型压电驱动器的结构设计与实验研究  

Structural Design and Experimental Research of a Novel Piezoelectric Actuator

作　　者：毕晓鹏[1] 褚祥诚[1] 季叶[1] 李龙土[1] 

机构地区：[1]清华大学材料科学与工程系新型陶瓷与精细工艺国家重点实验室,北京100084

出　　处：《人工晶体学报》2009年第S1期25-27,共3页Journal of Synthetic Crystals

基　　金：国家自然科学基金(50621201;10676015);国家863计划(2007AA03Z107);教育部科技创新工程重大项目培育资金项目(708019)

摘　　要：本文设计了一种新型结构的压电驱动器,其中压电陶瓷元件不需要粘接,而是通过螺栓与金属弹性体紧固在一起。由于预压力的作用,驱动器能够输出更大的推力,且陶瓷不易疲劳受损。作者通过有限元方法对该驱动器进行了建模和模态分析,并进行了样机制备。实验结果表明,该驱动器的工作频率在44.69 kHz,在该频率下激振,驱动器可有效驱动转子,转速达到93 r/min。A novel piezoelectric actuator was proposed,in which the piezoelectric ceramics are clamped by bolts,rather than bonded to the stator by adhesive.The actuator could produce more output force due to the clamped pressure,and also the fatigue properties of ceramics were improved.The finite element method was used to build the model of the actuator and compute the vibration mode.According to the design,a prototype was fabricated.The experimental results showed that the working frequency is 44.69 kHz,and when excited at this frequency,the actuator can drive the rotor.The rotation speed reaches 93 r/min.

关 键 词：压电驱动器 超声电机 振动模态 

分 类 号：TM359.9[电气工程—电机]