Modulation and Control of Series/Parallel Module for Ripple-Current Reduction in Star-Configured Split-Battery Applications
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 (CHB2). The control methods directly mitigate the source of the ripple current - the fluctuating arm power - by exploiting the parallel interconnection across the CHB2 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.
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Related Subject Headings
- Electrical & Electronic Engineering
- 4009 Electronics, sensors and digital hardware
- 4008 Electrical engineering
- 0906 Electrical and Electronic Engineering
Citation
Published In
DOI
EISSN
ISSN
Publication Date
Volume
Issue
Start / End Page
Related Subject Headings
- Electrical & Electronic Engineering
- 4009 Electronics, sensors and digital hardware
- 4008 Electrical engineering
- 0906 Electrical and Electronic Engineering