Battery ripple effects in cascaded and parallel connected converters

Dirk Kok, Michael Knowles, Adrian Morris, David Baglee
  • IET Power Electronics, May 2015, the Institution of Engineering and Technology (the IET)
  • DOI: 10.1049/iet-pel.2014.0224

Save on batteries by controlling ripple

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.

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.


Dr Dirk Kok
University of Sunderland

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.

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The following have contributed to this page: Dr Dirk Kok

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