Symmetrical Interleaved Low Input Current Ripple High Step-Up DC-DC Converter Based on Coupled Inductor

被引：0
|
作者：
Ding J. [1 ]
Gao S. [1 ]
Zhao S. [1 ]
Yin H. [1 ]
机构：
[1] Electric Power College, South China University of Technology, Guangzhou
来源：
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2021年 / 36卷 / 07期
关键词：
Coupled inductor; High step-up; Interleaved; Low input current ripple; Switched capacitor;
D O I：
10.19595/j.cnki.1000-6753.tces.200713
中图分类号：
学科分类号：
摘要：
Aiming at high voltage gain and high power application scenarios, the article proposes a symmetrical interleaved DC-DC converter based on coupled inductor. This circuit topology combines the advantages of interleaved connection and coupled inductors. On the one hand, it expands the capacity of the converter and reduces the input current ripple. On the other hand, the turns ratio of the coupled inductor can be used to adjust the voltage gain and improve the flexibility of the converter. Because the two-phase circuits are coupled together and completely symmetrical, automatic current-sharing can be realized, so there is no power imbalance problem. By integrating Switched Capacitor Units(SCU) and extending them to n, the voltage gain is further improved and the problem of high turns ratio of coupled inductor is avoided. Also, the voltage stress of the power device is reduced. Therefore, low voltage level and high performance semiconductor devices can be used to improve the converter's efficiency. The operating principle and steady-state performance of the converter are analyzed, and a1kW prototype is made. The highest efficiency of the converter is 97.34%, and94.64% at full load (1kW).The experimental results verify the correctness of the theoretical analysis and the feasibility of the proposed converter. © 2021, Electrical Technology Press Co. Ltd. All right reserved.
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页码：1507 / 1515
页数：8
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