Simulations of transducer behavior as a function of the frequency and the mechanical, dielectric and piezoelectric losses

Abstract

The different losses influence on the working behavior of a power transducer is investigated. For a given constant vibration speed of the transducer front mass, voltage, current, admittance and power are calculated over a large frequency band containing the resonance and antiresonance of the structure. Comparisons between these two vibration modes (resonant and antiresonant frequencies) can then be made. It has been shown that near at resonance, mechanical losses have a significant influence whereas piezoelectric and dielectric losses take more importance out of resonance. The difference between the powers calculated at the resonance and antiresonance is low. Moreover it has been clearly shown that losses are not independent and must satisfy a particular inequality with frequency otherwise a negative dissipated power is obtained revealing that chosen set of loss angles is not physical.