摘要
本文揭示了在电流模式控制Boost变换器中,由于存在内部或外部耦合电路引起的传导和辐射干扰,使得有可能产生呼吸现象,这是一种以较长的周期按顺序交替历经规则、分谐波和混沌状态的时间分叉现象,在功率变换电路中是一种非正常的工作状态.可以通过建立具有固定初相位的模拟干扰信号,并使其频率与变换器的开关频率相同,以便将呼吸现象(时间分叉)转换为参数分叉,并从分叉控制的角度来对这种呼吸现象进行合理解释和理论分析,从而给出变换器稳定设计的理论依据.理论分析结果与数值仿真是完全一致的,另外,在电路实验中也得到了印证.
Due to conducted or radiated EMI from inner or outer coupling circuits, breathing can exist in current-mode controlled Boost converter. It exhibits as a time-bifurcation undergoing regular period-1, subharmonics and chaos orderly and repeatedly for a long period. The breathing, as an improper operation state, should be avoided in power converters. By constructing an interference signal with the same frequency as the Boost converter and constant initial phase, time-bifurcation (breathing) will be mapped into parameter-bifurcation. In this way, breathing can be explained and analyzed from the viewpoint of bifurcation control. Furthermore the theoretical design principles insuring stable operation of converter are concluded. Simulation can gain the same results as those from experiment, and those from analysis as well.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2005年第5期915-919,共5页
Acta Electronica Sinica
基金
国家自然科学基金(No.60402001)
国家863计划课题(No.2003AA1Z1400)
