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宽占空比交错控制的三绕组耦合电感DC/DC变换器
吴贵洋,章家岩,陈浩,胡雪峰
作者单位E-mail
吴贵洋 安徽工业大学 电气与信息工程学院, 安徽 马鞍山 243032  
章家岩 安徽工业大学 电气与信息工程学院, 安徽 马鞍山 243032 zhangjiayn@189.cn 
陈浩 安徽工业大学 电气与信息工程学院, 安徽 马鞍山 243032  
胡雪峰 安徽工业大学 电气与信息工程学院, 安徽 马鞍山 243032  
摘要:
文章提出了一种新型交错连接三绕组耦合电感高增益DC/DC变换器。该变换器中,首先每个耦合电感的第二绕组分别与一个电容相串联构成准倍压单元,再与其原边绕组和主开关管S共同形成一相升压电路;其次每个耦合电感的第三绕组与该相开关管的钳位电容一起为另一相的准倍压单元进行充电,从而将两相电路进行交叉耦合;然后将耦合电感的原边进行交错并联。上述结构有以下优点:该变换器可以工作在较宽的占空比变化范围(0<D<1);每相电压和电流具有自动均分的功能;既能提高变换器的电压增益,又能降低功率器件的电压应力,同时具有灵活的高增益调整能力。笔者详细分析了所提变换器的工作原理,最后给出了实验结果以验证理论分析的正确性。
关键词:  交错连接  三绕组耦合电感  准倍压单元  自平衡  高增益
DOI:10.11835/j.issn.1000-582X.2017.08.007
分类号:TM46
基金项目:国家自然科学基金(51577002);安徽省自然科学基金(1408085ME80);安徽省教育厅自然科学重点项目(KJ2012A048)。
An extended duty ratio DC/DC converter with three-winding coupled inductor
WU Guiyang,ZHANG Jiayan,CHEN Hao,HU Xuefeng
Abstract:
In this paper, an interleaved high step-up DC-DC converter with winding-cross-coupled inductors is presented. Firstly, the second winding of each coupled inductor is connected with a capacitor, which composes a quasi voltage multiplier unit (QVMU). Then, a boost circuit consists of the QVMU, the primary winding and the main switch. Moreover, the QVMU can be charged through the clamp capacitor and the third winding of the other phase coupled inductor. Thus, two phases can be cross-coupled. Furthermore, the primary currents of two coupled inductors are interleaved in parallel at input. There are many advantages of the above-mentioned structure. Firstly, the proposed converter can be operated in the duty cycle of the entire range of variation and the expression of the voltage gain can be consistent across the range of the duty cycle. Secondly, the output voltage and input current of each phase can be automatically regulated to be equally distributed. Thirdly, the proposed converter can achieve a high step-up voltage conversion and the voltage stress on the power devices can be reduced. Lastly, a high step-up gain can be flexibly adjusted. The operating principle of the proposed converter is analyzed. In order to verify the theoretical analysis, an experimental prototype is built.
Key words:  interleaving  winding-cross-coupled inductor  quasi voltage multiplier unit  auto-balance  high step-up
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