A quadratic buck converter with lossless commutation
Pacheco, V.M.
do Nascimento, A.J., Jr.
Farias, V.J.
Batista Vieira, J., Jr.
de Freitas, L.C.
Dept. de Engenharia Eletrica, Univ. Federal de Uberlandia;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Apr 2000
Volume: 47,
Issue: 2
On page(s): 264-272
ISSN: 0278-0046
References Cited: 9
CODEN: ITIED6
INSPEC Accession Number: 6573364
Digital Object Identifier: 10.1109/41.836341
Current Version Published: 2002-08-06
Abstract
High switching frequency associated with soft commutation
techniques is a new trend in switching converters. Following this trend,
the authors present a buck pulsewidth modulation converter, where the DC
voltage conversion ratio has a quadratic dependence on duty cycle,
providing a large step-down. By introducing two resonant networks, soft
switching is attained, providing highly efficient operating conditions
for a wide load range at high switching frequency. Contrary to most of
the converters that apply soft-switching techniques, the switches
presented are not subjected to high switch voltage or current stresses
and, consequently, present low conduction losses. The authors present,
for this converter, the principle of operation, theoretical analysis,
relevant equations and simulation and experimental results
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