Temperature distribution of piezoelectric transformer with heat couple component using finite element method

The temperature field of a piezoelectric transformer with heat couple component are analyzed at steady state conditions in this paper. The contour extensional vibration mode of the transformer is determined by impedance simulation analysis and experiment result. Mechanical vibration losses, piezoelectric losses, dielectric losses are considered for a piezoelectric transformer. In order to verify the calculated temperature results, the piezoelectric transformer ´s temperature distributions were measured by the infrared thermometry. The experiment results show a good uniformity with the calculation results. For the piezoelectric transformer with heat couple component, friction heat were considered as another heat source of temperature distribution. The temperature distribution results show the heat couple component depresses temperature gradient of the piezoelectric transformer and improves piezoelectric material utilization rate effectively.