Analysis method for electrical characteristic of parallel connection and parallel-serial connected piezoelectric voltage transformer

Abstract

The method comprises: using the traditional lumped parameter equivalent-circuit model of the piezoelectric transformer, and using the admittance matrix Y to express the voltage gain, output power and correlated relation between the transmission efficiency specification and the piezoelectric transformer connection numbers (n) of the piezoelectric transformer.

Description

technical field [0001] The invention belongs to the field of electronic transformers, and relates to the connection of piezoelectric transformers and an analysis method for electrical characteristics, in particular to an analysis method for the electrical characteristics of piezoelectric transformers using parallel-parallel and parallel-series connections. Background technique [0002] In recent years, piezoelectric transformer (Piezoelectric transformer, referred to as PT), as a new type of electronic device, has become one of the research hotspots in the field of materials and information. , high conversion efficiency, small temperature rise, no electromagnetic interference and other outstanding advantages, it has broad application prospects in the fields of notebook computers, LCD displays and other backlight power supplies, household appliances and instruments. However, with the rapid development of the information industry, the LCD screen is getting bigger and bigger, a...

AI Technical Summary

Problems solved by technology

However, the first two methods have the following disadvantages: First, the manufacturing technology of multilayer piezoelectric transformers is very complicated, the consistency of mass production is poor, and the cost is high; the multilayer piezoelectric transformers of various manufacturers are very different and cannot be interchanged, and the structure of the control loop , the working principle is not the same, which hinder the further popularization and application of multilayer piezoelectric transformers

Second, improve the structure and vibration mode of the piezoelectric transformer. For example, in 2005, the 26th Research Institute of China Electronics Technology Group Corporation disclosed a piezoelectric transformer with a fan-shaped piezoelectric element, which is a radial vibration and The hybrid vibration mode combined with thickness contraction vibration has a high operating frequency and is mostly used in high-frequency switching power supplies, but the voltage gain is not as good as that of Rosen-type transformers, so it is difficult to apply to high-voltage fields

Regarding the characteristic analysis of series-parallel connection, there are only analysis methods for the parallel-parallel connection of Rosen-type piezoelectric transformers in the current literature, and there are no analysis reports on other connection methods.

Images