[journal title in Japanese]
Online ISSN : 1884-3247
Print ISSN : 0916-7269
Behavior of Magnetizing Current of High Frequency Transformer in Forward Converters
Katsuya Hirachi
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JOURNAL FREE ACCESS

2002 Volume 28 Pages 59-66

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Abstract

While bridge-type converters magnetize their transformers in both the positive and negative directions, forward-type converters magnetize them in only one direction. This suggests that in forward-type converters the magnetizing current flows in only one direction, and transformers supposedly operate only in the first quadrant of the BH plane. By determining the path followed by the magnetizing current under each operational mode of a forward-type converter, I show that these accepted theories are not necessarily correct. And by examining the behavior of the magnetizing current in two-transistor forward doubling circuit, I explain the peculiar shapes in voltage waveform.

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© The Japan Institute of Power Electronics
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