Multi-port multi-cell DC/DC converter topology for electric vehicle's power distribution networks
Multi-port multi-cell DC/DC converter topology for electric vehicle's power distribution networks
复制标题
用于电动汽车配电网络的多端口多单元 DC/DC 转换器拓扑
DOI：
10.1109/compel.2017.8013326
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
J. Kolar
中科院分区：
文献类型：
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作者：
J. Schäfer;D. Bortis;J. Kolar
在当今的电动汽车 (EV) 中，由于可用空间非常有限，功率密度是电气系统的一个关键标准。因此，配电网的高集成度是必然的。本文提出了一种新颖的多端口多单元（MPMC）拓扑，该拓扑结合了两个独立的两端口转换器系统的特征，这些系统通常用于最先进的电动汽车中。因此，这导致整个配电系统的总体功率密度更高。所提出的转换器包括多个相同的子转换器（单元），其中每个单元处理总转换器功率的相同份额。此外，正如本文将要展示的，多单元方法缓解了单单元解决方案中出现的几个技术设计挑战，与多端口多单元方法相比，单单元解决方案需要极高的输出电流和高降压比。最后，引入了 MPMC 控制策略，保证转换器在所有工作点上稳定运行并平衡电池功率。
In today's electric vehicles (EV), power density is a key criterion for electrical systems, due to the strongly limited available space. Thereby, a high integration level of the electric distribution network is inevitable. In this paper, a novel multi-port multi-cell (MPMC) topology is proposed, which combines the features of two independent two-port converter systems, which are commonly used in state-of-the-art EVs. Consequently, this results in a higher overall power-density of the overall electric distribution system. The proposed converter comprises multiple identical subconverters (cells), where each cell processes the same share of the total converter power. Furthermore, as will be shown in this paper, the multi-cell approach mitigates several technological design challenges arising in single-cell solutions, where, in contrast to the multi-port multi-cell approach, extremely high output currents and high step-down ratios are required. Finally, a MPMC control strategy is introduced, which guarantees stable operation and balanced cell powers in the converter for all operating points.