变结构有源钳位正激变换器  

Active-clamp Forward Converter with Variable Structure

作　　者：张绪 嵇保健 李俊 ZHANG Xu;JI Baojian;LI Jun(College of Electrical Engineering and Control Scienc,Nanjing TECH University,Nanjing 211816,Jiangsu,China;College of Automation,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China)

机构地区：[1]南京工业大学电气工程与控制科学学院,江苏南京211816 [2]南京理工大学自动化学院,江苏南京210094

出　　处：《电气传动》2021年第11期33-39,共7页Electric Drive

摘　　要：提出一种变结构有源钳位正激变换器,通过在有源钳位正激变换器副边增加一个整流二极管和一个高频开关管得到。变匝比结构的引入,使变换器可以根据输入电压大小调整原、副边匝比,降低副边功率器件应力,扩宽输入电压范围;有源钳位技术实现原边主、辅开关管的零电压开关(ZVS),减小原边开关管损耗;匝比的反复变换,使得变压器副边可以输出为0,1,2三个电平,优化电感电流纹波,从而降低滤波电感大小。对该拓扑的工作模态进行详细分析,并搭建实验平台,给出实验波形。A variable structure active clamp forward converter was presented.A rectifier diode and a high frequency switch were added to the secondary side of the active clamp forward converter.With the introduction of the structure of variable turn ratio,the converter could adjust the original and minor turns ratio according to the input voltage,reduced the stress of the minor power device,and widen the input voltage range.Active clamping technology had realized ZVS(zero-voltage switching)between primary and auxiliary switching,which reduced the switching loss of primary switching.The repeated transformation of turns ratio made the transformer side output to 0,1,and 2 levels,which optimized the inductance current ripple and reduced the size of the filter inductance.The working mode of the topology was analyzed in detail,the experimental platform was built,and the experimental waveforms were given.

关 键 词：变匝比 有源钳位 宽输入电压范围 零电压开关 三电平 

分 类 号：TM46[电气工程—电器]