The coupled inductor filter: analysis and design for AC systems
Senini, S.
Wolfs, P.J.
Dept. of Electr. Eng., Central Queensland Univ., Rockhampton, Qld.;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Aug 1998
Volume: 45,
Issue: 4
On page(s): 574-578
ISSN: 0278-0046
References Cited: 10
CODEN: ITIED6
INSPEC Accession Number: 6000783
Digital Object Identifier: 10.1109/41.704884
Current Version Published: 2002-08-06
Abstract
Coupled inductors have been used in specific DC-to-DC converters
to provide ripple-current steering. Switching ripple currents may be
preferentially directed away from a source or a load. This paper shows
that general purpose filters can be produced using coupled inductors and
capacitors. These are equally applicable to AC and DC applications. A
transfer function is developed for a filter based on a coupled inductor
and capacitor. The resulting filter is third order and is significantly
more effective than an inductor. The sensitivity of the filter to errors
in the turns ratio is examined. Finally, results from an experimental
power factor correction circuit are presented
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