Analysis of the temperature field distribution for piezoelectric plate-type ultrasonic motor

In this paper, heat problem and temperature distribution of a piezoelectric plate-type ultrasonic motor, which is operated at not only steady state conditions but also unsteady state conditions, are analyzed based on finite element analysis and finite difference method. Mechanical vibration losses, dielectric losses and friction heat were considered as the heat source of ultrasonic motor and were calculated using three-dimensional finite element method. Gauss–Seidel iteration method was used to calculate the temperature field based on finite difference method. The calculated temperature field distribution and the calculated temperature increase with time are verified at different pre-presses by comparison with experimental results obtained using an infrared imager. The results show a good agreement between experiment and calculation. It shows that the presented method for the temperature field distribution of piezoelectric ultrasonic motor is feasible.