摘要
为了研究软开关功率变换器中的混沌现象,以Boost ZVS PWM变换器为研究对象建立了精确离散数学模型,并基于此模型得到Boost ZVS PWM变换器的分岔图,通过仿真电压、电流及相平面图证明了分岔图与变换器运行状态基本一致,利用曲线拟合的方法划分出变换器的稳定区域,得到稳定区域随负载变化的趋势。本文建立的精确离散数学模型建立在数学通用公式基础上,可以应用于其他软开关DC/DC变换器混沌现象的研究。
In order to study the chaos of soft-switching converters, Boost zero-voltage-switching pulse-wide-modulation （ZVS PWM） converter is chosen as the object of study, and the precise discrete mathematic model of the converter is set up in the paper. Based on the model, bifurcation figure of the converter is obtained. It is proved that bifurcation figure is nearly consistent with the status of converter through simulation of voltage, current and phase portrait in the paper. The steady area of the converter is plotted out with curve fitting method, and the trend of steady area with load variation is obtained. The model in this paper is based on the general formula, therefore, it can be applied to the chaos study of other soft-switching DC/DC converters.
出处
《电工技术学报》
EI
CSCD
北大核心
2007年第5期78-83,共6页
Transactions of China Electrotechnical Society
