【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。更多还原

【Abstract】 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.更多还原