摘要
提出一种新型大型停车场电动汽车充电设施——直流充电桩以及适用于该设施后级装置的低电应力ZCS-PWM Superbuck变换器。首先详细分析该变换器的工作机理,给出软开关实现的条件和功率管电应力;然后建立系统的CCM平均模型,得出稳态特性和动态特性;最后以320 V/50 A·h的磷酸铁锂动力电池为负载,通过一台1.8 k W/80 k Hz样机进行实验验证。研究结果表明,该直流充电桩具有低谐波污染、高效率、长寿命、低成本以及易于批量建设等优点。
This paper presents a novel electric vehicle（ EV） charging facility—DC charging spot—in large parking lot and a zero-current-switching（ ZCS） pulse-width-modulated（ PWM） Superbuck converter with reduced electric stress suitable for the output stage. In the paper,the operation principles have been thoroughly analyzed and the condition of the soft switching and the electric stress of the power electronics devices are obtained. Then,the steady-state and dynamic character can be estimated by the state-space averaging approach. Finally,a charger prototype rated l. 8 k W /80 k Hz is constructed for a 320 V /50 A·h Lithium-ironphosphate battery pack. The simulation and experimental results show that the proposed DC charging spot has the advantages of low harmonic pollution,high efficiency,long lifetime,low cost and ease of bulk construction.
出处
《电工技术学报》
EI
CSCD
北大核心
2015年第23期32-41,共10页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(51207075
51477077)
江苏省自然科学基金(BK20141238)资助项目
关键词
充电设施
电动汽车
电力电子变换器
零电流软开关
低电应力
Battery charger
electric vehicle
power converters
zero-current-switching
reduced electric stress
