This paper presents a new reconfigurable LLC converter in fast electric vehicle (EV) charger applications. By using a reconfigurable bi-directional switch, the proposed converter restructures the secondary side windings of the transformers of two LLC converters in series or parallel, providing an adjustable effective turns ratio. The most powerful advantage of the proposed converter is the simple structure for reconfiguration. Also, the proposed converter does not contain capacitor in series with the resonant current path, which is appropriate for a large charging current in fast EV charger. Furthermore, the proposed converter maintains identical for the same switching frequency range both 400 V and 800 V batteries, due to the same quality factors in both cases. To verify the effectiveness of the proposed converter as a fast EV charger module, a prototype converter with a 150-1000 V and 25 kW/62.5 A output was constructed.

中文翻译：

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用于具有可重新配置双向开关的快速电动汽车充电模块的 LLC 谐振转换器


本文介绍了一种适用于快速电动汽车 (EV) 充电器应用的新型可重构 LLC 转换器。通过使用可重构双向开关，所提出的转换器重构了串联或并联的两个LLC转换器的变压器的次级侧绕组，提供了可调节的有效匝数比。所提出的转换器最强大的优点是重构结构简单。此外，所提出的转换器不包含与谐振电流路径串联的电容器，这适用于快速电动汽车充电器中的大充电电流。此外，由于在两种情况下具有相同的品质因数，所提出的转换器对于 400 V 和 800 V 电池的相同开关频率范围保持相同。为了验证所提出的转换器作为快速电动汽车充电模块的有效性，构建了一个具有 150-1000 V 和 25 kW/62.5 A 输出的原型转换器。