The Effects of Geometrical Factors on the Step-Up Ratio in Piezoelectric Transformer
The electromechanical properties of a newly proposed 3-dimensional piezoelectric transformer have been investigated. Especially, the effects of 3-dimensional geometry on the maximum tip displacement were carefully investigated. As a result, it was found that the maximum strain of the 3-dimensional piezoelectric device was significantly enhanced up to 4.5 times higher than that of a disk shape device. This data were in good agreement with the finite element model analysis of strains and vibration modes. Moreover, a very high voltage step-up ratio of 290 (10 times higher than the Rosen type), sustaining efficiency more than 96%, were achieved.
T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran
M. S. Yoon et al., "The Effects of Geometrical Factors on the Step-Up Ratio in Piezoelectric Transformer", Materials Science Forum, Vols. 539-543, pp. 3319-3325, 2007