Modeling the effect of operation temperature on characteristics of rosen type piezoelectric transformer

Abstract EN

A simplified lumped model that makes direct correlation between Rosen's piezoelectric transformer (PT) dimensions and material properties via equivalent circuit parameters was studied.

The model calculation of the resonance characteristics and voltage gain was associated with changes in operating temperatures from 50°C to 70°C.

It is found that for different load resistors, the resonance frequencies are shifted by less than 1.6% their normal values upon raising the operation temperature to 70°C, whereas the sensitivity of voltage gain is better at higher load resistors.

Each of the elastic compliances SE 11, SE 33 and SD 33 of the PT material due to their temperature dependency cause the resonance frequency to shift below and above the normal value by less than 1% for very slight change in voltage gain in each case.

The overall balance between mechanical parameters may play role in the optimum stability of the voltage gain.