Integrated high-quality rectifier-regulators
Madigan, M.T.; Erickson, R.W.; Ismail, E.H.
Industrial Electronics, IEEE Transactions on
Volume 46, Issue 4, Aug 1999 Page(s):749 - 758
Digital Object Identifier   10.1109/41.778229
Summary: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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