Since the temperature has a great effect on the service behavior of the ultrasonic motor, high temperature will affect its mechanical characteristics and service life. This article is on a model of a piezoelectric driven three-stator multi-degree-of-freedom ultrasonic motor. Firstly, the motion mechanism is analyzed, and the main causes of temperature rise are determined to be friction heat generation and vibration heat generation. Then, the theoretical model of temperature rise is built, and the temperature rise characteristics of the ultrasonic motor are simulated and analyzed by establishing a three-dimensional transient temperature field model. Finally, it is verified by temperature test experiment. The results show that the simulation analyses are consistent with the experimental results, and this analysis can correctly reflect the temperature rise characteristics of the motor. It provides a reference for further seeking the effect of the body temperature rise on the service behavior of the ultrasonic motor and improving the operating characteristics of the ultrasonic motor.

由于温度对超声波电机的使用行为有很大的影响，高温会影响其机械特性和使用寿命。本文介绍的是压电驱动的三定子多自由度超声波电机模型。首先分析运动机理，确定温度升高的主要原因是摩擦生热和振动生热。然后,建立温升理论模型,通过建立三维瞬态温度场模型对超声波电机的温升特性进行仿真分析。最后通过温度测试实验进行验证。结果表明，模拟分析与实验结果一致，并且这种分析可以正确反映电机的温升特性。为进一步探究体温升高对超声电机使用行为的影响，改善超声电机运行特性提供参考。