基于PFF控制的双向DC/DC变换器的研究  

Study of the Bi-directional DC/DC Converter Based on PFF Control Algorithm

作　　者：魏艳君[1] 丁浩[1] 漆汉宏[1] 李嘉位 

机构地区：[1]燕山大学,电气工程学院,河北秦皇岛066004 [2]南京农业大学工学院,江苏南京210000

出　　处：《电力电子技术》2014年第5期53-56,共4页Power Electronics

基　　金：高等学校博士学科点专项科研基金项目(20121333110007);河北省应用基础研究计划重点基础研究项目(13964304D)~~

摘　　要：以推挽全桥双向DC/DC变换器为研究对象,分析了其能量可双向流动的可行性,重点介绍了比例-前馈(PFF)控制算法在推挽全桥双向DC/DC变换器中的应用,并与PI控制算法进行了对比分析。根据推挽全桥双向DC/DC变换器的硬件条件,采用了同步整流技术。针对变换器的升压软起动问题,提出了一种根据电感电流控制占空比的升压软起动方法,仿真结果证明其能够有效防止升压起动时电感饱和的问题。最后,通过实验验证了所提控制方案的正确性和可行性。Based on the push-pull full-bridge bi-directional DC/DC converter,the feasibility of the bi-directional DC/DC converter in two power flows is described.Compared with the PI control algorithm,this paper focused on applying the proportional-feedforward（PFF）control algorithm to the push-pull full-bridge bi-directional DC/DC converter.Synchronous rectification technology is adopted based on the hardware of the push-pull full-bridge bi-directional DC/DC converter.In order to overcome the drawback of the soft-start,an effective method is proposed which can control the duty by detection the inductance current.The soft-start method presented here is evaluated through the simulation and the result proved its effectiveness.Finally,the proposed control strategy is experimentally tested to illustrate its validity and effectiveness.

关 键 词：变换器 比例-前馈控制 同步整流 

分 类 号：TM46[电气工程—电器]