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  4. Modulation and control of Series/Parallel Module for ripple-current reduction in star-configured split-battery applications
 
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Modulation and control of Series/Parallel Module for ripple-current reduction in star-configured split-battery applications
Dr. Lizana-Fuentes, Ricardo 
Facultad de Ingeniería 
Li, Zhongxi
Yu, Zhujun
Sha, Sha
Peterchev, Angel
Goetz, Stefan
10.1109/TPEL.2020.2996542
IEEE
2020
Split-battery converters based on cascaded H-bridges (CHBs) are gaining popularity due to their excellent physical modularity. During operation, however, the batteries experience substantial current ripple. Conventional ripple-current reduction methods rely on bulky passive components or complicated control. This article presents modulation and common-mode voltage injection methods for cascaded double-H-bridge converters (CHB 2). The control methods directly mitigate the source of the ripple current—the fluctuating arm power—by exploiting the parallel interconnection across the CHB 2 arms. In the lab setup, the proposed solution approximately halves the battery current ripple compared to the CHB counterpart. Finally, this article studies component sizing and limitations of the proposed solution.
Cascaded H-bridge
Ripple-current reduction
Split-battery converter
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