高温环境下旋转型行波超声电机性能研究  

Research on Characteristic of Traveling Wave Type Rotary Ultrasonic Motors Under High Temperature

作　　者：郑伟[1] 朱春玲[1] 芦丹[1] 丁庆军[1] 赵淳生[1] 

机构地区：[1]航空电源航空科技重点实验室(南京航空航天大学),江苏省南京市210016

出　　处：《中国电机工程学报》2008年第21期85-89,共5页Proceedings of the CSEE

基　　金：国家自然科学基金项目(90405010)~~

摘　　要：行波型超声电机适合用于宇航搭载设备驱动器,因此必须对其进行包括高温环境的特殊环境下的性能研究。通过对行波型旋转超声电机在高温环境下进行了机械性能测试,得到了超声电机高温环境机械特性:超声电机的空载转速有所下降,但最大力矩随着温度的升高而增大,在70℃时,超声电机的堵转力矩达到最大,在80℃时,堵转力矩微降。分析了超声电机各个部件在不同温度环境下性能的变化对超声电机机械特性的影响:电机定子和压电陶瓷在高温环境下对电机的力矩和转速有提升作用;定、转子的摩擦界面在高温环境下对电机的力矩和转速起降低作用;预压力使超声电机的力矩起增加,但使电机转速下降。Traveling wave rotary ultrasonic motors （TRUM） are a new kind of driver that is fit for the need of space navigation. It is necessary to get motor＇s mechanical characteristic under such abnormal environment as high temperature condition. In this study, the mechanical characteristics of TRUM are tested under high temperature environment. Obtained results show that speed of TRUM drops but torque of TRUM rises under high temperature condition. At 70℃, the maximum torque of TRUM appears. At 80 ℃, torque trends to decrease. In order to explain the reason that mechanical characteristics of TRUM change under high temperature condition, characteristics of some components of TRUM are analyzed under different temperature conditions. It is indicated that the characteristics of TRUM＇s stator and PZT under the high temperature condition increase speed and torque of TRUM. On the other hand, the friction between stator and rotor under that condition decreases the speed. It is TRUM＇s pro-press that increase speed and decrease torque under high temperature condition.

关 键 词：超声电机 高温环境 机械性能 压电陶瓷 预压力 

分 类 号：TM301[电气工程—电机]