Chip Multilayer Piezoelectric Ceramic Transformer Numerical Analysis And Features

Piezoelectric transformer has some advantages, for example small, light weight, boost high and no electromagnetic pollution characteristics, stable, safe and reliable, also has a good solution to solve the problem of the heavy, defects and poor anti-interference ability with traditional electromagnetic transformers. So it is very consistent with the development of electronic systems trend and expected to replace the electromagnetic transformer in a large range. It will become the first choice for the transformation of voltage level. At present, the piezoelectric transformer electronic information systems has played a very important role, but in greater range, its development and application is still limited by some shortcomings:the high-power output, too much reliance on the resonant frequency etc.In this paper, the piezoelectric transformer equivalent circuit models was analyzed, and then export the equivalent circuit model of multi-layer piezoelectric transformer, based on piezoelectric physical theory. Next, the single and multi-layer piezoelectric transformer vibration modes were analyzed by finite element method.We established a theoretical model of multilayer piezoelectric transformer and the equivalent circuit through piezoelectric transformer equivalent model theory. In this paper, the multi-layer piezoelectric transformer and improved single piezoelectric transformer's models were analyzed by the finite element software ANSYS. We would get some parameters:resonant frequency, displacement amplitude and so on. And test circuit was designed to measure the piezoelectric transformer. The results show that the single and multi-layer piezoelectric transformers design was correct and reasonable in this paper. It's useful for high-gain, high power piezoelectric transformer, and provides a certain theoretical ideas for the rapid development of piezoelectric transformer.