纵-弯复合旋转式超声波电动机的优化设计与性能分析  

Optimum Design and Performances Analysis of the Longitudinal-Bending Hybrid Rotating Type Ultrasonic Motor

作　　者：王光庆[1] 岳玉秋[1] 展永政[1] 

机构地区：[1]浙江工商大学信息与电子工程学院,杭州310018

出　　处：《电工技术学报》2015年第22期33-41,共9页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(51277165);浙江省自然科学基金(LY15F10001);浙江省教育厅项目(Y201223050)资助

摘　　要：提出一种采用压电叠堆和压电双晶悬臂板构成的新型纵-弯复合旋转式超声波电动机,利用电动机定子的一阶纵振动和二阶弯曲振动模态复合形成接触头的椭圆运动,实现电动机的旋转驱动。分析了电动机的总体结构和运行机理,利用有限元方法建立了电动机定子的机电耦合模型,通过对定子的模态分析和结构优化设计,确定了定子的两个工作模态以及两工作模态频率的调谐。通过对定子振动特性的分析,验证了电动机设计方法和设计思路的正确性。最后,利用冲量定理和能量守恒原理建立了电动机的力传递模型,数值分析了电动机的机械输出特性。研究结果对于改善和优化超声波电动机的输出性能以及电动机的建模具有实践指导作用。A novel longitudinal-bending rotating type ultrasonic motor consisting of a piezoelectric stack and two bimorph cantilever plates is presented in this paper. The 1st longitudinal vibration mode and the 2nd bending vibration mode are employed in this motor to generate an elliptic trajectory at the contact head of the stator, which drives the rotor to continuously rotate. The general structure and operating principle of the new motor are introduced at first, and the electromechanical model of the stator is established with finite element method. The modal analysis and optimization design of the stator, as well as the frequency tuning of the two modes, were carried out. Simulation analysis of the vibration performances was also performed to testify the validity of the design method. Finally, the force transferring model of the motor was derived based on the impulse theorem and the energy conservation principle, and the mechanical Research results contribute to improve the output ultrasonic motor. performances of motor were numerical calculated. performances and provide guidance on modeling

关 键 词：纵-弯复合型 超声波电动机 优化设计 冲量定理 数值分析 

分 类 号：TM356[电气工程—电机]