Coupled-Magnetic Filters With Adaptive Inductance Cancellation
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Lymar coupled-magnetic.pdf
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Author(s)
Lymar, Daria S.
Neugebauer, Timothy C.
Perreault, David J.
Date Issued
November 2006
Journal
IEEE Transactions on Power Electronics
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
Lymar, Daria S., Timothy C. Neugebauer, and David J. Perreault. “Coupled-Magnetic Filters With Adaptive Inductance Cancellation.” IEEE Trans. Power Electron. 21, no. 6 (n.d.): 1529–1540. © 2006 IEEE
Version
Final published version
Abstract
Conventional filter circuits suffer from a number of limitations, including performance degradation due to capacitor parasitic inductance and the size and cost of magnetic elements. Coupled-magnetic filters have been developed that provide increased filter order with a single magnetic component, but also suffer from parasitic inductance in the filter shunt path due to imperfectly-controlled coupling of the magnetics. In this paper, we introduce a new approach to coupled-magnetic filters that overcomes these limitations. Filter sensitivity to variations in coupling is overcome by adaptively tuning the magnetic circuit for minimum rms ripple performance with feedback based on the sensed filter output ripple. This active control enables much greater robustness to manufacturing and environmental variations than is possible in the conventional "zero-ripple" coupled-magnetic approach, while preserving its advantages. Moreover, the proposed technique also adaptively cancels the deleterious effects of capacitor parasitic inductance, thereby providing much higher filter performance than is achievable in conventional designs. The new technique is experimentally demonstrated in a dc-dc power converter application and is shown to provide high performance.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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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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DOI of Published Version
https://doi.org/10.1109/TPEL.2006.882975
