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Parasitic capacitance cancellation in filter inductors

Author(s)
Neugebauer, Timothy C.; 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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Abstract
This paper introduces a technique for improving the high-frequency performance of filter inductors and common-mode chokes by cancelling out the effects of parasitic capacitance. This technique uses additional passive components to inject a compensation current that cancels the parasitic current, thereby improving high-frequency filtering performance. Two implementation approaches for this technique are introduced. The first implementation achieves cancellation using an additional small winding on the filter inductor and a small capacitor. This approach is effective where very high coupling of the windings can be achieved or where only moderate performance improvements are required. The second implementation utilizes a small radio frequency transformer in parallel with the filter inductor to inject cancellation currents from the compensation capacitor. This technique requires an additional component (the transformer), but can provide a high degree of cancellation. Experimental results confirm the theory in both implementations.
Date issued
2006-01
URI
http://hdl.handle.net/1721.1/86913
Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Journal
IEEE Transactions on Power Electronics
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
Neugebauer, T. C., and D. J. Perreault. “Parasitic Capacitance Cancellation in Filter Inductors.” IEEE Trans. Power Electron. 21, no. 1 (Jan. 2006): 282–288.
Version: Final published version
Other identifiers
INSPEC Accession Number: 8936400
ISSN
0885-8993

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