IPOS型高增益DC/DC变换器  

High Gain DC/DC Converter Based on Input-parallel Output-series(IPOS)Structure

作　　者：周鸿彦 何良宗 杨泽龙 卢凤旺 陈一逢 ZHOU Hongyan;HE Liangzong;YANG Zelong;LU Fengwang;CHEN Yifeng(School of Aeronautics and Astronautics,Xiamen University,Xiamen 361012,Fujian Province,China;Xiamen Aiweida Electronics Co.,Ltd.,Xiamen 361006,Fujian Province,China)

机构地区：[1]厦门大学航空航天学院,福建省厦门市361012 [2]厦门市爱维达电子有限公司,福建省厦门市361006

出　　处：《中国电机工程学报》2024年第S01期306-317,共12页PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING

摘　　要：文中提出一种输入并联输出串联型高增益直流-直流变换器,解决了高增益变流器无法通过模块化组合进一步提高增益的难题。其中,单模块变换器由开关电容和耦合电感组成,会降低开关管的电压应力。同时,其中的有源钳位电路不仅可以抑制由漏感引起的电压尖峰,还能进一步提高电压增益。此外,在考虑该变换器全局效率优化时,两相变换器占空比不同,通过采用自适应载波移相控制方式可显著降低输入电流纹波。该组合变换器中所有功率器件都是能实现零电压开关,进一步降低了损耗。对该变换器进行详细的数学分析,并给出系统的设计依据。最后,在实验室搭建输出功率为768 W和输出电压480 V的实验样机,验证该变换器的优异性能。This article introduces a symmetrical,high gain,input-parallel output-serial,DC/DC converter based on voltage multiplier(VM)cells and active clamp circuits to obtain a high-voltage conversion ratio.The problem that the high gain dc-dc converter cannot be modularized is solved.The VM using a switched capacitor and the coupled inductor makes high voltage gain achievable,which results in reduced voltage stress on power switches.Meanwhile,the IPOS structure also makes great improvements in the above aspects.Importantly,by incorporating active clamp circuits,not only voltage spikes caused by leakage inductance are restrained,but also the clamped circuit plays a role in energy transfer to Boost the gain.In addition,to obtain the global optimal efficiency,the combined converter adopts the adaptive carrier phase shift control mode when the duty cycle of the two-phase converter is different,which can significantly reduce the input current ripple.Especially,zero-voltage switching(ZVS)for all switches can be obtained.A detailed mathematical analysis of the proposed converter is conducted for systematizing its design.Finally,a prototype of 768 W output power and the 480 V output voltage is implemented to verify the excellent performance of the proposed converter.

关 键 词：输入并联输出串联 高增益 直流-直流变换器 输入电流纹波 

分 类 号：TM46[电气工程—电器]