峰值电流模式斜坡补偿电路研究  

Study on Slop Compensation Circuits in Peak Current-mode Control

作　　者：夏泽中[1] 李远正[1] 陶小鹏[1] 

机构地区：[1]武汉理工大学,湖北武汉430070

出　　处：《电力电子技术》2008年第12期71-73,共3页Power Electronics

摘　　要：针对峰值电流控制模式变换器的不稳定性问题,分析了斜坡补偿的基本原理和峰值电流控制电路的稳定性原理。主要介绍了由射极跟随器构成的斜坡补偿电路及其参数设计,用以实现在大范围调整占空比时变换器电路的稳定性。以采用峰值电流控制模式的全桥移相变换器为设计实例来设计补偿电路参数,并通过电路实验获得了良好的补偿信号和稳定的变换器控制性能,由此证明了该设计方法的可行性。This paper mainly discusses the emitter follower compensation circuit and its parameters design to realize the stability of switching power converters when changing in larger duty ratio.Focusing on the instability of power converter using peak current-mode control scheme, the principle of a slop compensation for stabilizing switching circuits with the current-mode control is analyzed.A parameter design of the compensation circuit is performed for a phase-shift full bridge converter.Through the experiment, a linear slop signal and stabilized output voltage control are achieved.The circuit experimental result shows the validity of the proposed circuit design.

关 键 词：变换器 电路 补偿/峰值电流 斜坡补偿 

分 类 号：TM46[电气工程—电器]