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An Active Ripple Filtering Technique for Improving Common-Mode Inductor Performance

Author(s)
Cantillon-Murphy, Padraig; Neugebauer, Timothy C.; Brasca, Claudio; Perreault, David J.
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.

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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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Abstract
Active ripple filtering is the replacement of large passive components in power filter circuits with smaller passive components and active control circuitry. This letter focuses on common-mode filters, where a large common-mode inductor (choke) is replaced by two smaller chokes and active op-amp control. The technique is appropriate when improved attenuation is required at relatively low frequencies and the high-frequency filtering requirements are easily met. Smaller chokes save significantly in material and winding costs. The technique is more advantageous if wire-wound chokes can be replaced by planar printed circuit board chokes. The use of the technique in an automotive electromagnetic interference (EMI) filter application is explored in detail.
Date issued
2004-06
URI
http://hdl.handle.net/1721.1/86968
Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Journal
IEEE Power Electronics Letters
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
Cantillon-Murphy, P., T.C. Neugebauer, C. Brasca, and D.J. Perreault. “An Active Ripple Filtering Technique for Improving Common-Mode Inductor Performance.” IEEE Power Electronics Letters 2, no. 2 (June 2004): 45–50. © 2004 IEEE
Version: Final published version
ISSN
1540-7985

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