Abstract
Presently, DC power supply requirements in electronic applications are met by switch mode power converters. With the advent of high capacity semiconductor devices such as SIC MOSFETs and diodes, the power delivered by converters can be very comfortably enhanced. Nevertheless, the magnetic components such as the power transformers may limit the power delivery because of their thermal resistances and temperature management. Also, the geometry and the size of one single transformer may be a limiting factor for power delivery, though the other devices are rated high. In this paper, a simple technique to parallel multiple small transformers to enhance the power rating of the converter while guaranteeing the power sharing among the transformers is proposed. Two DC-DC forward converters are designed and fabricated, one with single larger transformer and another with two smaller transformers with identical specifications. The test results are presented validating the proposed technique.
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