ZVS isolated high step-up DC/DC converter

被引：0

作者：

Zhu, Binxin ^{[1
]}

Cheng, Shan ^{[1
]}

Tan, Chao ^{[1
]}

机构：

[1] School of Electrical Engineering and Renewable Energy, China Three Gorges University, Yichang

来源：

Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2015年 / 35卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Current-fed; DCM; Electric converters; High step-up; Isolation; ZVS;

D O I：

10.16081/j.issn.1006-6047.2015.05.011

中图分类号：

学科分类号：

摘要：

A ZVS isolated high step-up DC/DC converter is proposed, which combines L-type current-fed isolated DC/DC converter with DCM(Diode-Capacitor Multiplier) cells. The advantages of L-type converter are inherited, such as smaller input current ripple, lower transformer turn-ratio, etc.;the step-up conversion ratio can be easily adjusted by changing the number of DCM cells;all switches are turned on at zero-voltage, all diodes are turned off with zero-current and the diode reverse-recovery loss is suppressed by combining the active clamp circuit with the inductance leakage;the voltage stress of diode and the insulation class of transformer are lowered due to the DCM cells;all diodes have the same current and voltage stresses to simplify the thermal design. The working principle and performance of the proposed converter are theoretically analyzed and a prototype of 24 V input voltage, 400 V output voltage and 200 W output power is established. The highest efficiency of the prototype reaches 95%, verifying the effectiveness and correctness of the theoretical analysis. ©, 2015, Electric Power Automation Equipment Press. All right reserved.

引用

页码：70 / 76

页数：6

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