Wide Input Voltage Range Step-Up/Step-Down DC-DC Converter With Multiple Operating Modes for Fuel Cell Vehicles

IF 8.3 1区工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Transportation Electrification Pub Date : 2024-12-16 DOI:10.1109/TTE.2024.3517637

Shuchun Gao;Kai Zhou;Jiulong Wang;Zheng Li;Zhipeng Xu

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Abstract

In commercial fuel cell vehicles (FCVs) under certain operating conditions, the output voltage of the fuel cell (FC) can be higher than the dc bus voltage of the vehicle. To match the output voltage of the FC with the dc bus voltage, a dc-dc converter with high-gain step-up mode (HGSM) and step-up/ step-down mode (SUDM) is presented in this article, and has the advantages of continuous input current, wide voltage conversion range, and common ground structure. Meanwhile, the two modes of the proposed converter can meet the different voltage levels required by FCVs and also address the voltage drop caused by the exclusion of faulty FC stacks. In addition, this article proposes a hybrid switching-frequency control method based on the HGSM of the converter. The flexible frequency selection benefits the inductor design and reduces switching losses. An experimental platform containing a 400-W prototype is built, the experimental results show that the prototype can stabilize the output voltage to 400 V under two operating modes when the input voltage varies from 40 to 500 V, realizing up to ten times of voltage conversion, and the prototype maximum efficiency is to 96.2%.

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适用于燃料电池汽车的宽输入电压范围、具有多种工作模式的升压/降压型 DC-DC 转换器

在商用燃料电池汽车（FCVs）中，在一定的运行条件下，燃料电池（FC）的输出电压可以高于车辆的直流母线电压。为了使FC的输出电压与直流母线电压匹配，本文提出了一种具有高增益升压模式（HGSM）和升压/降压模式（SUDM）的dc-dc变换器，该变换器具有输入电流连续、电压转换范围宽、共地结构等优点。同时，该变换器的两种模式既能满足fcv所需的不同电压水平，又能解决由于排除故障的FC栈而导致的电压下降问题。此外，本文还提出了一种基于变换器HGSM的开关频率混合控制方法。灵活的频率选择有利于电感的设计，降低了开关损耗。搭建了包含400- w样机的实验平台，实验结果表明，当输入电压在40 ~ 500 V之间变化时，样机可以在两种工作模式下将输出电压稳定在400 V，实现了高达10倍的电压转换，样机的最高效率可达96.2%。

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 Transactions on Transportation Electrification Engineering-Electrical and Electronic Engineering

CiteScore

12.20

自引率

15.70%

发文量

449

期刊介绍： IEEE Transactions on Transportation Electrification is focused on components, sub-systems, systems, standards, and grid interface technologies related to power and energy conversion, propulsion, and actuation for all types of electrified vehicles including on-road, off-road, off-highway, and rail vehicles, airplanes, and ships.