Abstract

The major differences between symmetrical topology magamps and the forward power converter magamp are discussed. In a forward power converter, a small portion of the magnetizing current of the power transformer is diverted to the secondary for reset of the magamp's saturable reactor. In symmetrical topologies, the transformer's magnetizing current is not used for reset of the saturable reactor(s). The magnetizing current shifts to the secondary where it causes a series of problems. The authors examine these problems, identify solutions, and explain why a half-bridge magamp power supply is inherently less versatile than the forward power converter. >

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