Abstract
For the demonstration of feasibility and loss-reduction effect of the larger-capacity amorphous core transformers (AMT), this paper proposed the support structure and design method of the iron-loss reduced amorphous wound cores with a weight of 7 tons. We designed and manufactured 10 MVA single-phase test model with the cores inserted in a support cage having structures of the stress-buffered core support, the proof electromagnetic force from the windings, and the stray loss-reducing shields. The 50%-loaded total loss of the test model estimated from the calculated and measured results has been reduced by 35% compared with a conventional silicon-steel core transformer (SST) with the same power capacity.
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