一种新颖的磁集成自驱动倍流整流半桥三电平直流变换器

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摘要提出了一种新颖的磁集成自驱动倍流整流半桥三电平直流变换器。首先采用无非跨电容和钳位二极管的半桥三电平结构作为变换器的一次,接着采用倍流整流电路作为变换器的二次。为了减小变换器的体积,本文采用了磁集成技术,将主变压器拆分成两个,利用主变压器的励磁电感分别替代滤波电感,最后再将两个变压器集成到一副磁心里面。与传统倍流整流半桥三电平变换器相比,该变换器不存在三电平桥臂钳位二极管可靠性较差的问题;仅需采用一副磁心,增加了变换器的功率密度,同时可以直接利用主变压器辅助绕组驱动二次同步整流管,简化了驱动电路,提高了变换器的效率。一台28V/100A的原理样机验证了理论分析的正确性。

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	刘志军
	虞晓阳
	金科

关键词 ：自驱动, 倍流整流, 磁集成, 半桥三电平

Abstract：In this paper, a novel self-driven current-doubler-rectifier three-level converter with integrated magnetics is proposed. Firstly the three-level half-bridge structure without clamped diodes and flying capacitor is used as the primary side of proposed converter. Secondly the current-doubler- rectifier circuit is adopted as secondary side of proposed converter. In order to increase power density, the derivation of integrated magnetic is presented. The main transformer is split into two transformers and their magnetizing inductors are employed as output inductors, and finally these two transformers are integrated into one core. Compared to traditional zero-voltage-switching current-doubler-rectifier three-level converter, the proposed converter has several advantages. The problem of poor clamped diode reliability in traditional current-doubler-rectifier three-level converter is eliminated. Only one core is needed by using the integrated magnetic method, and so the power density is high. Meanwhile the windings of main transformer can be directly used to drive synchronous rectifiers to realize self-driven. So, the self-driven circuit is simple, and the efficiency is high. A 28V/100A prototype is built in lab to verify the theoretical analysis.

Key words： Self-driven current-doubler-rectifier integrated magnetic structure three-level half- bridge

收稿日期: 2012-05-30 出版日期: 2015-04-13

PACS:

TM46

基金资助:国家自然科学基金(51377080),江苏省自然科学基金杰出青年基金(BK20130036),高等学校博士学科点专项科研基金(博导类133218110015),霍英东教育基金会基础性研究课题(131056),江苏省产学研联合创新资金-前瞻性联合研究项目(BY2012016)和江苏省新能源发电与电能变换重点实验室开放研究基金资助项目

作者简介: 刘志军男,1987年生,硕士研究生,研究方向为高频直流变换器。虞晓阳男,1989年生,硕士研究生,研究方向为高频直流变换器。

引用本文:

刘志军,虞晓阳,金科. 一种新颖的磁集成自驱动倍流整流半桥三电平直流变换器[J]. 电工技术学报, 2015, 30(3): 131-139. Liu Zhijun,Yu Xiaoyang,Jin Ke. A Novel Self-Driven Current-Doubler-Rectifier Three-Level Converter with an Integrated Magneticl Structure. Transactions of China Electrotechnical Society, 2015, 30(3): 131-139.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2015/V30/I3/131

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