改进型三态开关交错并联高增益DC／DC变换器  

A Kind of Voltage Multiplier Unit Staggered Parallel High-gain DC/DC Converter

作　　者：王建章[1] 胡雪峰[1] 吴贵洋 

机构地区：[1]安徽工业大学,电气与信息工程学院,安徽马鞍山243032

出　　处：《电力电子技术》2017年第7期11-15,共5页Power Electronics

基　　金：国家自然科学基金(51577002);安徽省自然科学基金(1408085ME80)~~

摘　　要：研究了一种改进型三态开关高电压增益变换器。在输入并联-输出串联交错控制变换器基础上,将耦合电感初级引入变换器输入端,有效抑制输入电流纹波,实现输入电流自动均流的效果;两个耦合电感的次级与电容、电感构成电压倍增单元串联接入输出端,进一步提升变换器电压增益。该拓扑结构中两个串联的输出电容,既能回收再利用耦合电感的漏感能量,又能箝位开关管的漏源电压,减小开关管的电压应力,有利于选取低电压等级、低导通阻抗的开关器件,有助于减小功率管的导通与关断损耗。通过合理的漏感设计有效抑制了二极管的反向恢复问题,实现开关管零电流开关(ZCS)导通降低开关损耗。详细分析了所提变换器的工作原理与稳态工作特性,实验结果验证了理论分析的正确性。A tristate switch high step-up Boost converter is proposed.Based on input parallel output serial interleaving control converter, the coupling inductance primary side is introduced into the input of the converter, and the input cur- rent ripple can be effectively suppressed to realize the automatic current equalization of the input current.The sec- ondary sides of two couple-inductors are connected in series with a capacitor for a double voltage ceil to improve the voltage gain further.This structure can also reduce the voltage stresses of active switches and diodes.The leakage ene- rgy can also be recycled by the two output capacitors, which are charged interleaving in parallel and discharged in se- ries.It can help to reduce the loss of power tube conduction and shut off.Through the leakage inductance of the rea- sonable design effectively suppress the diode reverse recovery problem, realize the switch tube zero current switching （ZCS） which reduces the switching loss.The operating principle and steady-state characteristics of the converter are analyzed.Finally, the experimental results are given to verify the correctness and effectiveness of theoretical analysis.

关 键 词：变换器 交错并联 耦合电感 高增益 

分 类 号：TM46[电气工程—电器]