作　　者： ; ; ; ;

机构地区： 东北农业大学电气与信息学院

出　　处： 《电测与仪表》 2013年第3期81-85,共5页

摘　　要： 将随机扩频技术应用于Boost变换器中来降低电磁干扰、减小输出纹波已经得到了论证,但却忽略了其中的非线性现象。本文在分析了随机扩频技术和Boost变换器精确离散迭代模型的基础上,研究了采用随机扩频技术后Boost变换器中的分叉和混沌现象,通过MATLAB编程绘制了输出电压随着电路参数变化的分叉图,验证了它含有丰富的非线性动力学行为,而且分析了采用随机扩频技术对变换器中非线性现象的影响,同时,在电路参数不变的情况下,探讨了随机扩频技术的频率在不同范围内变化时Boost变换器中的分叉与混沌现象。这为更好设计Boost变换器电路提供了一定理论基础。 The random spread-spectrum technology is used in the Boost converter to reduce electromagnetic interference and the output ripple, which is demonstrated, but it ignores the nonlinear phenomena. This paper analyzes the random spread-spectrum technology and the Boost converter accurate discrete iterative model, and explores the bifurcation and chaotic phenomena of the Boost converter with random spread-spectrum technology. The bifurcation diagrams of the output voltage as the circuit parameter changes are drawn through the MATLAB programming, which verifies that it contains the rich nonlinear dynamic behavior. The phenomena that random spread-spectrum technology effects the nonlinear of the converter is analyzed. At the same time, in the case of the same circuit parameters, the bifurcation and chaotic phenomena is probed in the change of the frequency in different range of random spread-spectrum technology. This provides some theoretical basis to the better design of the Boost converter circuit.

关 键 词： 变换器 随机扩频 非线性现象 分叉图

领　　域： [电气工程]