Patent ID: 6792666
Filing Date: 2004-09-21
Classification: H01F,Y10T

Abstract:
A method for manufacturing a three-phase transformer, the method comprising:(i) producing two substantially plate-like elements of a magnetic circuit of the transformer from amorphous strips, wherein each of the plate-like elements being produced as a planar toroid of a desired shape by winding at least one amorphous strip about a central hole; (ii) annealing each of the planar toroids; (iii) impregnating each of the annealed planar toroids by a binding material; (iv) producing three column-like elementary circuits of said magnetic circuit from amorphous strips, wherein each of the column-like elementary circuits is produced as a toroid of a desired height by winding at least one amorphous strip about a central axis; (v) annealing each of the column-like toroids; (vi) impregnating each of the annealed column-like toroids by a binding material; (vii) forming each of the impregnated column-like toroids with a radial slot extending along the height of the column-like toroid and filled with an insulating material; (viii) mounting a coil block on each of the column-like toroids with the slot to form the corresponding one of the three phases of the transformer; (ix) attaching opposite butt-end surfaces of each of the column-like toroids to the plate-like elements, respectively and arranging the column-like toroids in a spaced-apart parallel relationship, such as to form the magnetic circuit of the transformer as a spatial symmetrical structure about a central axis of the transformer presenting the closed magnetic circuit for magnetic flux propagation therethrough, spacers between the elements of the magnetic circuit of the transformer being filled with a material containing a magnetic powder.