Patent ID: 6668444
Filing Date: 2003-12-30
Classification: H01F,Y10T

Abstract:
A process for the manufacture of a wound, multi-cored amorphous metal transformer core, which process comprises the steps of:producing a series of cut strips from an unannealed amorphous metal which is at least 90% glassy and has a nominal composition according to the formula M70-85Y5-20Z0-20 â€ƒwherein the subscripts are in atom percent, â€œMâ€  is at least one of Fe, Ni and Co. â€œYâ€  is at least one of B, C and P, and â€œZâ€œ is at least one of Si, Al and Ge; with the proviso that (i) unto 10 atom percent of component â€œMâ€  can be replaced with at least one of the metallic species Ti, V, Cr, Mn, Cu, Zr, Nb, Mo, Ta, and W, and (ii) up to 10 atom percent of components (Y+Z) can assembling the unannealed cut strips into groups, each group comprising a plurality of cut strips layered in register; assembling the groups into a plurality of packets; forming the packets about a mandrel to form unannealed transformer cores having core windows, each core having a single laceable joint; assembling the unannealed transformer cores into a configuration suited for use within an assembled transformer; annealing the assembled unannealed transformer cores; thereafter unlacing each of the transformer cores and subsequently replacing the transformer cores.