Evaluation and Comparison of Conducted EMI in Three Full-Bridge DC-DC Switching Converters

2019 10th International Power Electronics, Drive Systems and Technologies Conference (PEDSTC) Pub Date : 2019-02-01 DOI:10.1109/PEDSTC.2019.8697825

M. Yazdani, Mohammad Farzanehfard

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引用次数: 4

Abstract

Switching power supplies is one of the major causes of electromagnetic interference in electronic devices due to the fast transient of voltages and currents. Full bridge switching converters are commonly used for medium and high power application. High electromagnetic interference takes place due to the large number of active elements in full bridge converter. Soft switching methods are able to reduce EMI in switching mode power supplies. In this paper, the effect of the use of the phase shift control and also use a resonant series schemes to implement soft switching conditions in the full bridge converter is investigated from EMI viewpoint. The modeling of conducted EMI in phase shifted DC-DC full bridge converter, series resonant full bridge converter and conventional hard switching full bridge converter are presented and compared using CST studio software. The modeling results indicate that the series resonant full bridge converter has a better performance than the phase shifted full bridge switching converter from EMI viewpoint.

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三种全桥DC-DC开关变换器传导电磁干扰的评估与比较

开关电源由于电压和电流的快速瞬变，是造成电子设备电磁干扰的主要原因之一。全桥开关变换器通常用于中大功率应用。在全桥变换器中，由于有源元件数量较多，会产生较大的电磁干扰。软开关方法能够降低开关电源中的电磁干扰。本文从电磁干扰的角度研究了在全桥变换器中采用相移控制和谐振串联方式实现软开关条件的效果。利用CST studio软件对移相DC-DC全桥变换器、串联谐振全桥变换器和传统硬开关全桥变换器的传导电磁干扰进行了建模，并进行了比较。仿真结果表明，从电磁干扰的角度看，串联谐振式全桥变换器比相移式全桥开关变换器具有更好的性能。

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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2019 10th International Power Electronics, Drive Systems and Technologies Conference (PEDSTC)

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