A Two-Stage Bidirectional DC–DC Converter With a Wide Output Voltage Range for DC Fast Charging Stations in E-Mobility Applications

IF 4.9 2区工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Journal of Emerging and Selected Topics in Power Electronics Pub Date : 2024-12-11 DOI:10.1109/JESTPE.2024.3514681

Rajendra Prasad Upputuri;Bidyadhar Subudhi

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Abstract

The drive to reduce the charging time and energy loss in electric vehicles (EVs) has led to increasing battery voltages to 800 V, 1000 V, 1.25 kV, and 1.5 kV, posing new challenges for designing EV fast chargers, especially for heavy-duty EVs. Two-stage converters, comprising isolated and regulated dc-dc stages, are emerging for their superior performance. This article proposes a novel two-stage bidirectional dc-dc converter with an extremely wide operating voltage range. The design features a dual-transformer reconfigurable three-leg converter (DTR3LC) in the first stage, an interleaved reconfigurable buck converter (IRBC) in the second stage, and four auxiliary switches for reconfiguration. These switches enable the secondary side of the DTR3LC to switch between parallel and series connections, which are then regulated by the IRBC, resulting in high efficiency and low current ripple across a wide voltage range. A 1-kW scaled-down laboratory experimental setup was developed and tested with an input voltage of 80 V to charge EV batteries ranging from 15 to 150 V, achieving a maximum efficiency of 95.32% at 150 V.

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一种用于电动汽车直流快速充电站的两级宽输出电压范围双向DC-DC变换器

为了减少电动汽车的充电时间和能量损失，电池电压已经上升到800v、1000v、1.25 kV和1.5 kV，这给电动汽车快速充电器的设计带来了新的挑战，尤其是重型电动汽车。两级变换器，包括隔离和调节dc-dc级，是新兴的优越性能。本文提出了一种工作电压范围极宽的新型两级双向dc-dc变换器。该设计在第一级采用双变压器可重构三支路转换器（DTR3LC），第二级采用交错可重构降压转换器（IRBC），以及四个用于可重构的辅助开关。这些开关使DTR3LC的二次侧能够在并联和串联连接之间切换，然后由IRBC调节，从而在宽电压范围内实现高效率和低电流纹波。开发了1 kw的缩小实验室实验装置，并在输入电压为80 V的情况下对15 ~ 150 V的电动汽车电池进行了充电测试，在150 V时的最高效率为95.32%。

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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来源期刊

IEEE Journal of Emerging and Selected Topics in Power Electronics ENGINEERING, ELECTRICAL & ELECTRONIC-

CiteScore

12.50

自引率

9.10%

发文量

547

审稿时长

3 months

期刊介绍： The aim of the journal is to enable the power electronics community to address the emerging and selected topics in power electronics in an agile fashion. It is a forum where multidisciplinary and discriminating technologies and applications are discussed by and for both practitioners and researchers on timely topics in power electronics from components to systems.