NDLI: Ripple Minimization Through Harmonic Elimination in Asymmetric Interleaved Multiphase DC

Content Provider	IEEE Xplore Digital Library
Author	Schuck, M. Pilawa-Podgurski, R.C.N.
Copyright Year	1986
Abstract	Symmetric multiphase dc-dc converters are widely used in power electronics, as they enable the processing of high power through splitting the overall load-current into multiple phases. Distributing the processed power symmetrically between the phases and performing ripple minimization through interleaving is well understood. However, in recent applications such as maximum power point tracking for solar photovoltaic, converters are forced to operate under asymmetric conditions, due to differences in the sources or loads of each converter. This study presents a control technique, based on harmonic elimination, that allows for ripple minimization under asymmetric conditions. The mathematical derivations are outlined and simulations are used to evaluate the performance of the proposed technique. Measurements taken from an experimental prototype, consisting of three dc-dc buck converters, demonstrate significant improvements in ripple reduction over conventional interleaving techniques. When the multiphase converter is operated at the optimum asymmetric phase-shift found through the techniques presented here, a more than 3x reduction in net current ripple is observed under realistic operating conditions. Additionally, the undesirable first harmonic ripple component is reduced by 14.8 dB with the proposed technique.
Sponsorship	IEEE Power Electronics Society
Starting Page	7202
Ending Page	7214
Page Count	13
File Size	2456089
File Format	PDF
ISSN	08858993
Volume Number	30
Issue Number	12
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Harmonic analysis Minimization DC-DC power converters Topology Inductors Computer architecture Inverters ripple minimization multiphase converter interleaved converter asymmetric operation harmonic elimination Asymmetric operation
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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