弛豫铁电单晶超声电机的动态响应模拟与分析  

Modeling and Analysis of the Dynamic Response of Ultrasonic Motor Fabricated by Relaxor-based Ferroelectric Single Crystals

作　　者：曹磊[1] 杜慧玲[1] 史翔[1] 任广林[1] 马武祥[1] 

机构地区：[1]西安科技大学材料科学与工程学院,陕西西安710054

出　　处：《压电与声光》2017年第3期370-373,共4页Piezoelectrics & Acoustooptics

基　　金：陕西省重点科技创新团队基金资助项目(2014KCT-04);陕西省国际科技合作重点基金资助项目(2012KW-10)

摘　　要：相对于传统压电陶瓷,新型压电单晶材料铌镁酸铅-钛酸铅(PMNT)具有更优良的介电和压电性能。该文将PMNT单晶作为超声电机的驱动材料,引入二维弹性接触、预应力等因素建立数学模型。经Matlab软件对20mm超声电机进行模拟,其最大空载转速为383r/min,输入电压频率为50.3kHz。经过与实测结果对比,该模型能够较准确地模拟电机稳态运行时的性能参数。Comparing with the conventional piezoelectric ceramic, the novel piezoelectric single crystals of PMNT possess more excellent dielectric and piezoelectric properties. In this paper, the PMNT single crystal is used as the driving material of the ultrasonic motor, and the mathematical model is established by introducing the elements of a two-dimensional elastic contact and pre-stress and others. The simulation of a ultrasonic motor with the diameter of 20 mm is carried out by the Matlab software. The result shows that the motor has a maximum no-load velocity of 383 r/min and input voltage frequency of 50. 3 kHz. Compared with the experimental results, the model can de-scribe the performance parameters of the motor accurately during steady state operation.

关 键 词：行波超声波电机 机电耦合 模拟 铌镁酸铅-钛酸铅(PMNT)单晶 

分 类 号：TM304[电气工程—电机] TM306