倍流整流移相全桥DC/DC变换器模糊PI控制  

Fuzzy PI Control of PSFB DC/DC Converter With Current-doubler-rectifier

作　　者：谢勇[1] 孟杰[1] 黄丽娟[1] 殷明星[1] 

机构地区：[1]扬州大学,信息工程学院,江苏扬州225127

出　　处：《电力电子技术》2012年第7期28-30,共3页Power Electronics

基　　金：国家自然科学基金项目(61174046)~~

摘　　要：提出了一种构建倍流整流移相全桥DC/DC变换器小信号模型的方法。该方法将倍流整流等效成全波整流,改变移相全桥全波整流DC/DC变换器小信号等效电路中的滤波电感和变压器匝比,就能得到倍流整流移相全桥DC/DC变换器的小信号模型。应用该模型设计了模糊自整定PI控制系统,并对设计的系统进行实验。用TMS3202808作为控制芯片制作了80 kHz,400 W的实验样机,实验结果表明系统工作稳定并且动、静态性能均较好。A method of constructing small signal model for phase-shifted full-bridge （PSFB） converters with current-doubler-rectifier（CDR） is presented.In the proposed method,small signal model for PSFB converters with a CDR is obtained by putting CDR equivalent to full-wave rectifier, and altering filtering inductances and transformer ratios in small signal circuit for PSFB converters with full-wave rectifier in hterature.By using the small signal model,the fuzzy adaptive PI control system is designed.The experimental prototype of 80 kHz/400 W is made by using TMS3202808 as control chip, and the results show that system works stable and the dynamic and static performance are well.

关 键 词：变换器 倍流整流 移相全桥 

分 类 号：TM46[电气工程—电器]