A High Range Buck-Boost PFC Converter for Universal Input EV Applications

G. K. N. Kumar, A. Verma
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Abstract

In this paper, a buck-boost PFC AC-DC converter is suggested for on-board electric vehicle charging (OBC). This converter can be utilised as a part of an OBC system at the front-end for low voltage (LV) battery charging with ratings ranging from 1kW to 3.3kW. In traditional buck-boost with high gain at roughly unity duty ratio, inductor is shorted to source, causing capacitor discharge to load. But with the use of two MOSFETs and two diodes as per the proposed configuration the above mentioned issue can be eliminated with out increasing the additional device count.Moreover, a positive voltage at the output can also be obtained with increased voltage range. Simulation findings are presented to support the viability. The converter can operate with a wide input voltage range of $\mathbf{60}-\mathbf{270}V$ AC while maintaining input current THD within limits.
用于通用输入EV的高量程降压PFC变换器
本文提出了一种buck-boost PFC AC-DC变换器,用于车载电动汽车充电(OBC)。该转换器可以用作前端OBC系统的一部分,用于额定功率从1kW到3.3kW的低压(LV)电池充电。在传统的大致等占空比的高增益降压升压中,电感与电源短路,导致电容放电。但是根据建议的配置使用两个mosfet和两个二极管,可以消除上述问题,而不增加额外的器件计数。此外,随着电压范围的增大,输出端也可以获得正电压。仿真结果证明了该方法的可行性。该变换器可以在$\mathbf{60}- $ mathbf{270}V$ AC的宽输入电压范围内工作,同时保持输入电流THD在限制范围内。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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