带恒功率负载的DC／DC变换器起动过程分析  

Start-Up Process Analysis of DC/DC Converter With Constant Power Load

作　　者：王建华[1] 张方华[1] 龚春英[1] 朱成花 

机构地区：[1]南京航空航天大学航空电源航空科技重点实验室,南京210016 [2]通用电气中国研发中心,上海201203

出　　处：《电工技术学报》2009年第4期121-125,共5页Transactions of China Electrotechnical Society

基　　金：国家重点基础研究发展计划项目(973项目)(2007CB210303);台达环境与教育基金会《电力电子科教发展计划》(DRE02006007)资助项目

摘　　要：以平均电流控制Buck变换器为研究对象,基于平均大信号模型,借助相平面法,对恒功率负载以及阻性负载的起动过程进行比较,分析了两种情形下的起动过程,揭示了变换器带恒功率负载起动过程存在两种类型:正常起动与限流工作状态,通过提高电流限流点可以确保系统集成后起动性能不受影响。仿真与实验结果验证了理论的正确性。With average large signal model and phase plane method, the start-up processes of average current mode controlled buck converter with both constant power load and resistive load are analyzed. The analysis indicates that there are two kinds of process that are normal start-up and current-limited processes when converter operates as constant power load, which are determined by the current-limited value of source converter. Finally, the theoretical analysis is confirmed with simulation and experimental results.

关 键 词：平均大信号模型 相平面法 恒功率负载 起动过程 

分 类 号：TM910[电气工程—电力电子与电力传动]