Dynamics and temperature field analysis of piezoelectric driven three-stator multi-degree-of-freedom ultrasonic motor.

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.