Resonant piezoelectric ring transformer

We have investigated experimentally the factors which influence electrical and mechanical losses as well as harmonic generation in a piezoelectric ceramic. To this end, we have used a piezoelectric ring transformer. The experiments were done for rings with different dimensions of electrodes. The secondary circuit was open, short-circuited or loaded by a small resistance. The results obtained can be used as a basis for the theoretical analysis of physical phenomena in piezoelectric ceramics under high power excitation. They can also be used to differentiate mechanical and electrical losses during transformer operation. This can have large practical importance when elaborating new ceramic compositions for various applications (actuators, sensors, etc.).