A Novel ZVZCS Full-Bridge DC/DC Converter Used for Electric Vehicles
A Novel ZVZCS Full-Bridge DC/DC Converter Used for Electric Vehicles
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DOI：
10.1109/tpel.2011.2178103
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发表时间：
2012-06
影响因子：
6.7
通讯作者：
M. Pahlevaninezhad;P. Das;J. Drobnik;Praveen Jain;Alireza Bakhshai
中科院分区：
文献类型：
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作者：
M. Pahlevaninezhad;P. Das;J. Drobnik;Praveen Jain;Alireza Bakhshai
本文提出了一种新型的ZVZCS全桥DC/DC变换器，它能够在很宽的负载变化范围内有效地处理和传输功率。所提出的DC/DC转换器是用于对电动车辆中的牵引电池（高压电池）充电的插入式AC/DC转换器的一部分。该应用中的关键挑战是全桥转换器从绝对空载到满载条件的操作。为了确保全桥变换器在这样宽的负载变化下的可靠操作，变换器不仅应当在全操作范围内以令人满意的效率以从满载到空载条件的软切换操作，而且输出二极管桥两端的电压也需要被钳位，以避免在转弯期间出现任何不利的电压过冲-关断的输出二极管中常见的常规全桥转换器。为了实现这种严格的要求和高可靠性，转换器采用对称的无源近无损辅助电路来为全桥半导体开关提供无功电流，这保证了在所有负载条件下导通时间的零电压开关。此外，所提出的拓扑结构是基于电流驱动整流器，以钳位输出二极管桥的电压，也满足ZVZCS操作的转换器，从而在所有负载条件下的上级效率。在本文中的转换器的操作详细介绍了分析设计过程。3 KW样机的实验结果验证了该变换器的可行性和上级性能。
This paper presents a novel ZVZCS full-bridge DC/DC converter, which is able to process and deliver power efficiently over very wide load variations. The proposed DC/DC converter is part of a plug-in AC/DC converter used to charge the traction battery (high voltage battery) in an electric vehicle. The key challenge in this application is operation of the full-bridge converter from absolutely no-load to full-load conditions. In order to confirm reliable operation of the full-bridge converter under such wide load variations, the converter should not only operate with soft-switching from full load to no-load condition with satisfactory efficiency for the full range of operation, but also the voltage across the output diode bridge needs to be clamped to avoid any adverse voltage overshoots arising during turn-OFF of the output diodes as commonly found in regular full bridge converters. In order to achieve such stringent requirements and high reliability, the converter employs a symmetric passive near lossless auxiliary circuit to provide the reactive current for the full-bridge semiconductor switches, which guarantees zero voltage switching at turn-ON times for all load conditions. Moreover the proposed topology is based on a current driven rectifier in order to clamp the voltage of the output diode bridge and also satisfy ZVZCS operation of the converter resulting in superior efficiency for all load conditions. In this paper operation of the converter is presented in detail followed by analytical design procedure. Experimental results provided from a 3KW prototype validate the feasibility and superior performance of the proposed converter.