Piezoelectric Nonlinearity and its Temperature Dependency Under High Power Driving
S. Miyake, T. Morita
The University of Tokyo, Kashiwa-shi, Japan
Piezoelectric transducers are used in various devices and they are driven under high power condition. Nonlinear effects such as “jumping phenomena” in current, hysteresis of admittance curve and temperature rise of piezoelectric transducer under high power driving are well-known; however, they cannot be simulated by a traditional piezoelectric equivalent circuit because it is based on only a linear piezoelectric effect. For FEM simulation for designing piezoelectric devices, the nonlinear effect must be clarified. Our research group has already succeeded in simulating nonlinear effects without temperature rise; however, in the actual operation, temperature distribution is inevitable in the piezoelectric transducer due to mechanical dumping and dielectric
loss. In this research, we measured the change of the material constants of piezoelectric transducer as a function of temperature. Based on these parameters, a transfer matrix model for piezoelectric vibration under high power driving was established.
ACTUATOR 2016 Manuscript P 03
Publication date: 01/06/2016
Manuscript P 03 published in Conference Proceedings ACTUATOR 2016
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