Three-Phase Bidirectional DC/DC Converter With Six Inverter Legs in Parallel for EV Applications

电池(电) 逆变器 电动汽车 计算机科学 电压 航程(航空) 工程类 汽车工程 电子工程 拓扑(电路) 功率(物理) 电气工程 物理 量子力学 航空航天工程
作者
Gierri Waltrich,M.A.M. Hendrix,J.L. Duarte
出处
期刊:IEEE Transactions on Industrial Electronics [Institute of Electrical and Electronics Engineers]
卷期号:63 (3): 1372-1384 被引量:61
标识
DOI:10.1109/tie.2015.2494001
摘要

The success of electric vehicles (EVs) greatly depends on battery size, cost, lifetime, and capacity. The battery capacity of EVs has to contain enough energy to allow EV users to drive, at least, the minimum distance that internal combustion engine vehicles take. However, even with very efficient EVs and combining all the available highly efficient EV technologies, the battery capacity still needs to be large. Thus, one alternative to reduce the battery size is to improve the charging infrastructure by implementing sufficient public/private fast-charging locations, which will significantly increase the EV driving range with relatively low battery capacities. However, this kind of infrastructure requires charging with higher current capability, due to the high power levels involved in the fast-charging process. In this paper, a bidirectional dc/dc converter with six inverter legs connected to a three-phase output is proposed. The converter is similar to a three-phase dual-active-bridge (DAB) converter with more inverter legs in parallel. These additional inverter legs increase the converter current capability, without affecting the DAB main characteristics, preserving similar modulation techniques and DAB advantages. An accurate study about the proposed topology is carried out in this paper, and simulations and experimental results are shown for a 20-kW prototype, validating the theoretical analysis.
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