Switching Power Supply Chaotic Phenomena Modeling And Simulation Studies And Small Power Development,

Switching power supply is a nonlinear dynamic system, with a wealth of nonlinear phenomena. When the switching power supply system parameters change, the bifurcation occurs, leading to chaos. Under certain conditions, using chaos theory to explain the switching power supply system instability has a very important practical significance; the same time can also be used to improve the chaotic switching power supply performance. In this thesis, a systematic study BUCK-BOOST converter and soft-switching converter of Chaos and its generating mechanism, the converter is to be generated from the periodic state to chaotic state of development, and the converter in how it affects their electromagnetic properties.This article mainly includes the following:1 For studying BUCK-BOOST CONVERTER bifurcation and chaos,we choose the continuous inductor current mode BUCK-BOOST converter, to establish its discrete mapping model. The numerical simulation by MATLAB to obtain the BUCK-BOOST Converter bifurcation diagram. Analyze how sensitive parameters as the system of changes in bifurcation and even chaos. Through the simulation, BUCK-BOOST converter at different stages of time-domain waveform analysis has been BUCK-BOOST Converter is how to change from a periodic state to chaotic state.2. For studying the zero-current soft switching converter bifurcation and chaos we analysis the zero-current soft switching converter sub-model, through the approximation method to simplify the model, a zero-current soft switching converter discrete mapping model. Then in Orcad / Pspice to create zero-current soft-switching converter circuit simulation, we were selected resonant capacitor and resonant inductor soft-switching power supply system for the sensitive parameters of the simulation are zero-current soft-switching converter at different stages of time-domain waveform and phase diagram, further soft-switching converter is to change from a periodic state to chaotic state, and the chaos of the soft-switching converter of electromagnetic properties.3, Through the positive and negative current market status analysis of dual-output power supply, understand the market demand for such power, the market needs to optimize the structure of general use, and higher prices. Therefore, this paper designs and BOOST topology based on positive and negative voltage that can output a new power supply. Introduced the chips used in the MC34063 power supply circuit performance, design and manufacturing of several groups around the transformer, the transformer performance test, by analyzing the relevant parameters to be more optimized transformer samples. At last, the power output characteristics were tested to achieve the design requirements...