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Design of 1 kW bidirectional half-bridge CLLC converter for electric vehicle charging systems

机译:电动汽车充电系统1 kW双向半桥CLLC转换器的设计

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DC-DC converters are utilized in many applications such as automobiles, chargers, uninterrupted power supplies (UPS), and renewable energy systems. Galvanically isolated DC-DC converters are usually selected in electric vehicle (EV) battery charging systems. The converters typically interface between a DC link and a high voltage battery pack. Resonant CLLC DC-DC converters can achieve galvanic isolation, bidirectional power flow, and high efficiency, which make them good candidates for bidirectional EV charging systems. In this paper, a bidirectional half-bridge CLLC converter is designed and evaluated. An optimal soft-switching feature is applied in the design. The operating principle, design methodology and some considerations are presented. The prototype with 1 kW power rating interfaces a 300 - 600 V DC link and a high voltage battery pack (200 - 400 V). The performance in terms of efficiency, control complexity, component stress and cost is analyzed.
机译:DC-DC转换器用于许多应用中,例如汽车,充电器,不间断电源(UPS)和可再生能源系统。通常在电动汽车(EV)电池充电系统中选择电隔离的DC-DC转换器。转换器通常在直流母线和高压电池组之间进行接口。谐振CLLC DC-DC转换器可实现电流隔离,双向功率流和高效率,使其成为双向EV充电系统的理想选择。本文设计并评估了双向半桥CLLC转换器。在设计中采用了最佳的软开关功能。介绍了工作原理,设计方法和一些注意事项。额定功率为1 kW的原型连接了300-600 V直流链路和高压电池组(200-400 V)。分析了效率,控制复杂性,组件压力和成本方面的性能。

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