PlwaECTRlC TWNSFMR USING ENRGY TRAPPING OF WIDTH-SEAR VIBRATION IN LiWS PLATE

Piezoelectric transformers proposed by Rosen have been studied for high voltage step-up applications. A piezoelectric transformer using a LiNbO, proposed recently by Nakamura et al. ('I has low loss and a simple structure. A plate of conventional piezoelectric transformer was supported only at the point of the node of the vibration. Rigid support is required for high power applications. To apply a piezoelectric transformer to a power circuit, we studied ways of transmitting power and how to support the piezoelectric plate. Based on the studies, we proposed a piezoelectric transformer using energy trapping of width shear vibration in