PSM开关变换器的大信号模型与瞬态特性  

Large Signal Model and Transient Characteristics of PSM Switching Converter

作　　者：罗萍[1] 熊富贵[1] 李肇基[1] 陈光 

机构地区：[1]电子科技大学微固学院,四川成都610054

出　　处：《电子学报》2004年第11期1829-1832,共4页Acta Electronica Sinica

摘　　要：针对传统PWM调制具有轻载下效率低的缺点 ,论文作者提出一种新的高效调制模式———脉冲跨周调制PSM模式 .本文对这种新的PSM开关变换器调制模式进行了包括大信号解析模型、离散模型和相平面模型的大信号建模工作 ,并借助变换器的解析解、离散模型和相平面分析法对PSM变换器开环 /闭环系统的瞬态响应特性进行了分析 .研究表明PSM变换器不仅较PWM调制模式轻载下效率高 ,而且具有响应速度更快 。Aiming at normal PWM low efficiency at light loads, the author proposed a novel high efficiency modulation mode named pulse skip modulation mode PSM. This paper establishes the large signal model of the novel PSM switching converter mode, which includes large analytical model, discrete model and phase plane model. Basing on its analytical model, discrete model and phase portrait, the transient characteristics of the open and closed PSM converter are given. Compared with PWM converter, PSM converter has quicker response and better interference rejection besides high efficiency.

关 键 词：PSM变换器 大信号模型 解析模型 离散模型 相平面法 瞬态响应特性 

分 类 号：TN624[电子电信—电路与系统]