| 摘要 |
PROBLEM TO BE SOLVED: To obtain a piezoelectric transformer in which the transformer performance can be modified without requiring any modification in the shape of a piezoelectric when diversified requirements are imposed on the step-up ratio or the efficiency of the piezoelectric transformer or regulation is required for the output performance of an inverter circuit when it is mounted on a system employing the transformer. SOLUTION: The ratio of polarization at the driving section and the power generating section of a piezoelectric to the saturated polarization is differentiated between the driving section and the power generating section. The step-up ratio and the efficiency of a transformer exhibit different characteristics as compared with those of a piezoelectric where both the driving section and the power generating section are subjected to saturated pogarization. Since the characteristics vary differently depending on the extent of polarization at the driving section and the power generating section, performance of the transformer can be modified using a piezoelectric of identical shape. |
