摘要
软开关技术实现了传统双向DC／DC变换器的发展。为了有效解决开关损耗和电磁干扰等问题，本文在传统双向DC／DC变换器中加入软开关以实现零电压转换或零电流转换，其中软开关单元包含三个辅助开关，一个谐振电容和一个谐振电感。变换器在Buck模式下的两种驱动方式能够应用于不同的储能系统中。第一种方法通过一个辅助开关管的硬关断和其他的开关管软开关减少了系统导通损耗。另一种方法实现了所有开关管的零电压开通或零电流关断，并且谐振环中存在相对较高且固定的导通损耗。本文还提出了一种理想的软开关Boost拓扑图。仿真与实验结果验证了拓扑图的特征。
A soft-switching solution implemented to the traditional bidirectional DC/DC converter is developed. Three auxiliary switches, one resonant capacitor and one resonant conductor composed of soft-switching cell which is equipped in the traditional bidirectional DC/DC converter to realize its ZCT or ZVT operations, and the two drive methods are presented for the converter operation in buck mode under the different storage applications systems. The first method with less conduction losses suffers from a hard turning off process in one of the auxiliary switches, while the others experience the soft operation. As for the other method, the zero voltage or zero current transmissions in all switches are realized, and the relative higher but fixed conduction losses is introduced by the resonant circle. And the proposed topology performs ideal soft switching at boost operations. The characteristics of the proposed topology are verified with simulation and experimental results.
出处
《磁性元件与电源》
2016年第4期132-137,共6页
Components and Power
基金
国家自然科学基金（51477139）,陕西省教育厅基金（2013JK0999）.
关键词
DC/DC变换器
软开关
零电压转换
零电流转换
DC/DC converter
Soft-switching
Zero voltage transition （ZVT）
Zero current transition （ZCT）
