An Improved Asymmetrical PWM Controlled Full Bridge DC-DC Converter for Circulating Current Reduction

被引：1
|
作者：
Zhu, Yunqiu [1 ]
Guo, Zhiqiang [1 ]
Han, Bing [2 ]
机构：
[1] Beijing Inst Technol, Sch Automat, Line 4, Beijing, Peoples R China
[2] Stock Res Inst Co Ltd, CRRC Qingdao Sifang Rolling, Qingdao, Peoples R China
来源：
2020 IEEE 9TH INTERNATIONAL POWER ELECTRONICS AND MOTION CONTROL CONFERENCE (IPEMC2020-ECCE ASIA) | 2020年
基金：
中国国家自然科学基金;
关键词：
asymmetrical PWM; reduced circulating current; zero voltage switching; low output current ripple; ZVS RANGE;
D O I：
10.1109/IPEMC-ECCEAsia48364.2020.9367974
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
An improved full bridge converter that features reduced circulating current is presented in this paper. Two split capacitors, two transformers and an improved rectifier stage have been added in the modified converter. Different form traditional phase-shift converters, the proposed converter is controlled by asymmetrical PWM signals. This converter can greatly reduce the circulating current during the freewheeling period. Although the circulating current is reduced, all switches can still achieve ZVS. In addition, the load power is equally shared between the two transformers. And the current ripple of the output filter inductor is also reduced. The volume of the transformers and the output filter inductor can be optimized. What's more, this converter can meet short circuit and soft start-up cases. Finally, a 1kW prototype is built to verity the proposed converter.
引用
收藏
页码：1324 / 1331
页数：8
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