Abstract
Optimal design of transformer for high-frequency high-power applications involves proper choice of number of primary and secondary turns of proper conductor area in windings as well as configuring those conductors to influence not only the copper loss but also the functioning of power converter. The design of magnetic circuit, however, depends on choice of cores with proper magnetic and thermal features. Traditionally, cores of same soft-magnetic materials are used. Nowadays, several types of soft magnetic materials are available possessing different magnetic, electric and thermal conduction features. For high power transformers several cores are stacked. To improve the power handling capability, this article proposes to use flux integrators of different materials to generate superior power loss and heat removal characteristics. The idea would be practically validated through design and testing of transformer for 25 kW induction heating applications.
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