Study on the new type of dual output of single disc piezoelectric ceramic transformer

This paper developed a new type of dual output single disc piezoelectric ceramic transformer, which was made up of a disc input and two annular output terminals. The piezoelectric equation combined with elastic theory was applied to the analysis of the radial vibration of the piezoelectric disc and ring vibrator polarized in thickness direction, and the equivalent circuit of this new type of piezoelectric ceramic transformer was derived by using analytical method. Based on this, the analytical solution of the input impedance, the resonance frequency, the anti-resonance frequency, the voltage gain was solved. The resonance frequency and anti-resonance frequency of the experiment verified the theoretical results. Secondly, this paper analyzed that the relationship between the piezoelectric transformer geometry size with the electromechanical coupling coefficient. Finally, the relationship of the voltage gain, electric load and frequency was described by three dimension image.