PCCM下推挽正激变换器的研究与实现  

Research and Realization of Peak Current controlled Push-Pull Forward Converter

作　　者：赵俊宝[1] 贲洪奇[1] 周庆忠[1] 

机构地区：[1]哈尔滨工业大学,黑龙江哈尔滨150001

出　　处：《电力电子技术》2007年第10期107-109,共3页Power Electronics

摘　　要：提出了一种24V/15A直流变换器的设计方法。主电路采用推挽正激电路,通过在传统推挽电路的基础上增加一个箝位电容,起到抑制偏磁和开关管关断电压尖峰的作用。控制采用峰值电流控制方式(Peak CurrentControlled Model,简称PCCM),为了克服其对占空比要求的限制,加入了斜坡补偿环节。在进行详细的理论分析基础上,给出了主电路和控制电路一些关键参数的设计步骤;最后通过原理样机的研制,验证了理论分析的正确性。A design method of 24W15A DC converter is introduced.The main circuit adopts push-pull forward circuit which adds a clamping capacitor to the traditional push-pull circuit for suppressing the high turn-off voltage spike of the main switches and the magnetic bias.The control mode is peak current control, and to overcome the restriction of the duty cycle the slope compensation segment is added.After detailed theoretical analysis the design measures of some key parameters of main circuit as well as control circuit are given.A prototype is manufactured eventually and the theoretical analysis is verified.

关 键 词：变换器 电容器 补偿 

分 类 号：TM46[电气工程—电器]