Patent ID: 6880228

Claim:
A method for manufacturing a three-phase transformer, the method comprising the steps of: (i) producing two substantially plate-like elements of a magnetic circuit of the transformer in the form of toroids by winding at least one magnetic strip; (ii) producing each of three column-like elementary circuits of said magnetic circuit in the form of toroid of a multi-layer structure by winding predetermined number N of packages of magnetic strips about a central axis of the toroid, each package being composed of a predetermined number n of layers formed by n strips placed on top of each other; (iii) forming each of the columns with a radial slot filled with an insulating material; (iv) mounting a coil block on each of the columns obtained in step (iii) to form the corresponding one of the three phases of the transformer; (v) mounting the coil blocks carrying columns between the plate-like elements in a spaced-apart parallel relationship of the column-like toroids, such as to form a spatial symmetrical structure about a central axis of the transformer, spacers between the elements of the magnetic circuit of the transformer being filled with a material containing a magnetic powder.