This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Aug 1999
Volume: 46,
Issue: 4
On page(s): 749-758
ISSN: 0278-0046
References Cited: 15
CODEN: ITIED6
INSPEC Accession Number: 6348046
Digital Object Identifier: 10.1109/41.778229
Current Version Published: 2002-08-06
Abstract
A new family of AC-DC converters is derived which integrate the
functions of low-harmonic rectification, low-frequency energy storage,
and wide-bandwidth output voltage control into a single converter
containing one, two, or four active switches. These converters utilize a
discontinuous conduction mode input inductor, an internal energy storage
capacitor, and transformer secondary circuits which resemble the bridge,
forward, flyback, or Cuk DC-DC converters. A large-signal equivalent
circuit model for this family is presented, which uses the
“loss-free resistor” concept. Design strategies and
experimental results are given. High-performance regulation with
satisfactory line-current harmonics is demonstrated with conventional
duty-ratio control. Further improvements in line current are possible by
simultaneous duty-ratio and switching-frequency control
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