电工技术学报2017，Vol.32Issue(15)：111-119,9.DOI:10.19595/j.cnki.1000-6753.tces.160544
T型直线超声波电动机的运行机理及其特性分析
Operating Mechanism and Characteristics Analysis of a T-Shaped Linear Ultrasonic Motor
摘要
Abstract
A novel T-shaped linear ultrasonic motor was proposed.The d31 mode of the PZT was used to excite the bimorph cantilever beams to generate a longitudinal vibration,which can push the slider to move in a straight line with the friction force between the driving feet and the slider.The general structure and operating principle of the new motor were introduced at first.Then the stator of the T-shaped linear ultrasonic motor was modeled with the finite element method (FEM),and the force transferring model of the contact surface between the stator and the slider was established based on the impulse theorem and the force equilibrium law.With this model,simulations on the speed-thrust characteristics under different pre-load were performed,and the validity of the model was testified by the experimental results.Experimental results show that when the motor is excited by a voltage with peak-peak amplitude of 200 V and frequency of 23.75 kHz,the no-load speed of the motor reaches 250 mm·s-1 when the pre-load is 50 N,and the maximum thrust reaches 7.6 N when the pre-load is 200 N.关键词
直线超声波电动机/压电双晶悬臂梁/T型结构/运行机理/d31模式/力传递模型Key words
Linear ultrasonic motor/bimorph cantilever beams/T-shaped structure/operating mechanism/d31 mode/force transferring model分类
信息技术与安全科学引用本文复制引用
王光庆,徐文潭,杨斌强..T型直线超声波电动机的运行机理及其特性分析[J].电工技术学报,2017,32(15):111-119,9.基金项目
国家自然科学基金(51277165)、浙江省自然科学基金(LY15F010001)和浙江省教育厅(Y201223050)资助项目. （51277165）
