Transformer with ferromagnetic foil windings

摘要

The proposed transformer includes windings made of a multi-layer ferromagnetic foil tape having an even number m of ferromagnetic layers, coated by interlayer insulation. The winding's upper ends are connected through a first yoke, the winding's bottom ends are connected through a second yoke. Each winding -is wrapped by a short-circuited coil, and -contains a component for transposition of layers connected in a break at the middle of tape. The insulation's thickness is determined by a ratio of d i > u n2 , pic* / ( E n2 , pic · m ), where u n2 , pic is a maximum peak voltage between adjacent winding turns, E n2 , pic is a maximum electric field strength of the insulation. The insulation uses either ferroelectric material Fe 2 O 3 , or multi-layered material with an intensive antiferromagnetic interaction formed as a plurality of pairs of alternating layers of Cu-Fe with a ratio of thicknesses of Cu and Fe ranged from 5:1 to 10:1.