A wide input voltage range ZVS isolated bidirectional DC-DC converter for ultra-capacitor application in hybrid and electric vehicles

2012 IEEE International Electric Vehicle Conference Pub Date : 2012-03-04 DOI:10.1109/IEVC.2012.6183239

Shenghui Cui, D. He, Zhuoyu Chen, T. Habetler

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引用次数: 11

Abstract

This paper presents a new wide input voltage range ZVS isolated bidirectional DC/DC converter for an ultra-capacitor module used as an auxiliary power supply in electric vehicles. Compared to the conventional bidirectional converters, this modified circuit minimizes device current stress over a wide input voltage range. A natural zero-voltage switching for the transformer-connected switches is achieved without additional device. Moreover, reverse-recovery process of the diode of the transformer-connected switch module is avoided. These two features promise high operation frequency of transformer to improve power density. These advantages make the new converter promising for high power density applications especially to overcome high device current stress problem. In this paper, firstly, a completed design consideration of the new topology is presented; secondly, an analysis of operation is provided; finally, a 9-21V/66V 500W prototype is built up and it successfully proved this converter's device current stresses minimization and high power density characteristics.

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宽输入电压范围ZVS隔离双向DC-DC变换器应用于混合动力和电动汽车的超级电容器

本文提出了一种新型宽输入电压范围ZVS隔离双向DC/DC变换器，用于电动汽车辅助电源的超级电容模块。与传统的双向变换器相比，这种改进的电路在宽输入电压范围内将器件电流应力降至最低。变压器连接的开关无需额外装置即可实现自然零电压开关。此外，还避免了变压器连接的开关模块的二极管的反向恢复过程。这两个特点保证了变压器的高工作频率以提高功率密度。这些优点使新型变换器在高功率密度应用中具有很大的前景，特别是在克服高器件电流应力问题方面。本文首先对新拓扑结构进行了完整的设计考虑;其次，进行了操作分析;最后搭建了9-21V/66V 500W样机，成功验证了该变换器器件电流应力小、功率密度高的特点。

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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2012 IEEE International Electric Vehicle Conference

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