软开关反激DC-DC变换器宽输入电压和全负载范围的应用

2015 International Conference on Circuits, Power and Computing Technologies [ICCPCT-2015] Pub Date : 2015-03-19 DOI:10.1109/ICCPCT.2015.7159329

Rincy Lonappan, Della David

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引用次数: 2

摘要

软开关技术在减小dc-dc变换器的尺寸、降低成本、提高平均效率和功率密度方面具有非常重要的作用。本文介绍了一种软开关反激式dc-dc变换器，其通断均为零电压。通过在反激变压器的两侧放置两个小的交流电容器，可以在宽负载和线路范围内实现软开关。开关的触发是通过测量磁化电压和电流来实现的。这种方法在接通和关断过程中提供零电压开关，不受线路电压和负载电阻的影响。本文介绍了新型变换器的四种工作模式。增加开关频率可以减小系统的总体尺寸。为了提供恒定的输出电压，采用了电流参考控制。给出了不同负载和线路条件下的仿真结果，验证了该变换器的性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Soft switched flyback DC-DC converter for wide input voltage and full load range applications

Soft switching techniques have a very important role in reducing the size, cost and also in improving average efficiency and power density of dc-dc converter. This paper introduces a soft switched flyback dc-dc converter with zero-voltage switching during both turn on and off. The soft switching is obtained over wide load and line ranges by placing two small ac capacitors in both side of flyback transformer. The triggering for switches is given by measuring the magnetizing voltage and current. This method provides zero-voltage switching during turn on and turns off independent of line voltage and load resistance. The new converter has four modes of operation which is described in this paper. The overall size of the system is reduced by increasing the switching frequency. In order to provide constant output voltage, current reference control is employed. The simulation results under different load and line conditions are provided to verify the performance of the new converter.

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2015 International Conference on Circuits, Power and Computing Technologies [ICCPCT-2015]

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