混沌抑制开关变换器电磁干扰的研究  

Reducing EMI of switching converter with chaos

作　　者：张黎[1] 丘水生[1] 李志忠[1] 

机构地区：[1]华南理工大学电子与信息学院,广东广州510640

出　　处：《电波科学学报》2006年第3期445-449,共5页Chinese Journal of Radio Science

基　　金：国家自然科学基金资助项目(60372004);广东省自然科学基金项目(20820)

摘　　要：以电流型Boost开关变换器为研究对象,分析了变换器的混沌工作模式及其电磁兼容性,运用统计分析方法推导出混沌状态的电感电流纹波平均值及其功率谱计算公式。对混沌与周期工作模式的时域和频域特性进行对比分析,得出混沌工作模式可以改善开关变换器的电磁兼容性,但电感电流纹波相应增加,从而降低变换器的效率。仿真结果验证了理论分析。The electromagnetic compatibility （EMC） of chaotic mode Boost converter in current mode was analyzed, and mean ripple and power density spectrum of the inductor current were derived by the statistical analysis approach. The performance of chaotic operation of the converter in time domain and frequency domain was compared with that of the periodic operation. It is showed that EMC of the converter is improved, the inductor current ripple increases and the efficiency degrades. The theoretical analysis is confirmed by the simulation results.

关 键 词：混沌 开关变换器 电磁干扰 

分 类 号：TM461[电气工程—电器]