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| Research on cascaded converter based on boost and four transformer series/parallel LLC |
| Fan Wen, Zhang Dairun, Yu Yan |
| School of Electrical Engineering and Information, Sichuan University, Chengdu 610065 |
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Abstract A two-stage DC/DC topology which consists of Boost and a new four transformer primary series secondary paralleled LLC resonant converter is designed. The topology is designed to meet the demand of DC power converters with wide-range input, high-current output and high power density. The four transformer primary series secondary paralleled are used in the second stage LLC, the turn ratio, the stress of voltage and current of single transformer are all decreased. Moreover, this circuit have a good current sharing characteristic and high efficiency. The equivalent model and the gain characteristic of the secondary LLC resonant converter are derived from the fundamental harmonic approximation, and the parameter of Boost and LLC are optimized. Simultaneously, the output current sharing is analyzed even with mismatched parameter. Finally, the correctness and feasibility of the theory are validated by Saber simulation results.
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Received: 14 May 2018
Published: 16 November 2018
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| Cite this article: |
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Fan Wen,Zhang Dairun,Yu Yan. Research on cascaded converter based on boost and four transformer series/parallel LLC[J]. Electrical Engineering, 2018, 19(11): 5-9.
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http://dqjs.cesmedia.cn/EN/Y2018/V19/I11/5
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[1] 张沛然, 李敏远. 一种加辅助网络的移相全桥ZVS PWM变换器[J]. 电力电子技术, 2013, 47(2): 67-69, 100.
[2] 戴玉, 郭育华. 高速磁浮车载电网DC/DC变换器研究[J]. 电气化铁道, 2018(2): 83-87.
[3] 董纪清, 杨上苹, 黄天祥, 等. 用于磁耦合谐振式无线电能传输系统的新型恒流补偿网络[J]. 中国电机工程学报, 2015, 35(17): 4468-4476.
[4] Bo Yang, Fred C L, Zhang A J, et al.LLC resonant converter for front end DC-DC conversion converters[C]//Applied Power Electronics Conference and Exposition, 2002: 1108-1112.
[5] 韩晓钢, 齐铂金. 基于单周期控制的Boost型APFC电路设计及仿真[J]. 电气技术, 2017, 18(1): 8-12.
[6] Simone S De, Adragna C, Spini C, et al.Design- oriented steady state analysis of LLC resonant converter based on FHA[A]. Proceedings of the Power Electronics, Electrical Drives, Automation and Motion, 2006: 200-207.
[7] 石健将, 章江铭, 龙江涛, 等. 高频变压器一次侧串联LLC+输出端并联Buck级联直流变换器[J]. 电工技术学报, 2015, 30(24): 93-102.
[8] 张涛, 朱小平. 基于LLC变换器的电动汽车充电机设计[J]. 电气技术, 2016, 17(6): 97-100.
[9] Bing Lu, Liu Wenbo, Yan Liang.Optimal design methodology for LLC resonant converter[C]//IEEE Applied Power Electronics Conference and Exposition, 2006: 533-538.
[10] 候振义. 直流开关电源技术及应用[M]. 北京: 电子工业出版社, 2006. |
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2018, Vol. 19 
