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

发布时间：2018-11-28 14:46

【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。
[Abstract]:A novel three-level DC / DC converter with magnetic integration self-drive current doubling rectifier half-bridge is proposed. First, the half-bridge three-level structure with all transcapacitor and clamped diode is used as the first time of the converter, and then the double current rectifier circuit is used as the second time of the converter. In order to reduce the volume of the converter, the magnetic integration technique is adopted in this paper, the main transformer is divided into two, and the excitation inductance of the main transformer is used to replace the filter inductor respectively. Finally, the two transformers are integrated into a magnetic core. Compared with the traditional half-bridge three-level converter, this converter does not have the problem of poor reliability of triple-level bridge arm clamping diode. Only one core is used to increase the power density of the converter, and the secondary synchronous rectifier can be driven directly by the auxiliary winding of the main transformer, which simplifies the drive circuit and improves the efficiency of the converter. A prototype of 28V/100A verifies the correctness of the theoretical analysis.
【作者单位】：南京航空航天大学;
【基金】：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) 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
【分类号】：TM46

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