Abstract
A systematic method to derive the topology is presented for a family of forward converters with inherent demagnetizing features in high-power application. A basic forward cell concept is proposed with three basic forward cells, named as, forward positive cell, forward negative cell, and forward composite cell, respectively. All cells consist of active switch, diode, and transformer, and are the basic building blocks of a forward converter that uses auxiliary diodes to realize natural magnetizing reset. The topology derivation rules are proposed. Some existing and novel forward topologies are constructed as examples. The forward converters, built in such way, illustrate features such as natural-magnetizing reset, recycle of leakage and magnetizing energy, low voltage stress of active switch, zero-voltage switching, etc. An input series output parallel forward converter, thus generated, is analyzed in detail, as example, with experimental results given.
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