What is it about?
The ripple effects from converters affect the battery life span negatively. This ripple effect is enhanced in certain converter-converter topologies. This paper describes the origins, effects of ripple in different topologies and shows a preference for the parallel topology over cascaded topologies.
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Why is it important?
The ripple size in cascaded topologies is depended on the contribution of the secondary source. Often this contribution is there to protect the battery from - for example - high peak demand but the effects of the ripple size introduces its own losses which can not be ignored.
Perspectives
In converter simulation often averaging techniques are used which assume a constant steady output, which is not the case in the real world. These ripples can be filtered out but this requires additional components and would come as a surprise (in weight, volume and cost) to any developer trying to implement the proposed topology.
Dr Dirk Kok
University of Sunderland
Read the Original
This page is a summary of: Battery ripple effects in cascaded and parallel connected converters, IET Power Electronics, May 2015, the Institution of Engineering and Technology (the IET),
DOI: 10.1049/iet-pel.2014.0224.
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