Investigation of Heating Problem in a Langevin Piezoelectric Actuator

Abstract

Langevin piezoelectric actuators have large dielectric and mechanical losses. Most of these losses are converted into accumulating internal heat that increases the temperature of the actuator. Heating problem of Langevin piezoelectric actuator is analyzed in the paper. Investigated actuator consists of a half wavelength Langevin transducer and a half wavelength waveguide. [..] Distribution of the temperature along the actuator was measured when the different diameters of the waveguide are used. Results of numerical modeling and measurement are compared and discussed.