Patent ID: 8316528
Filing Date: 2012-11-27
Classification: H01F,Y10T

Abstract:
1. A method for manufacturing electrical windings comprising the steps of: a) providing a metal or composite mandrel defining internal shape of a winding; b) applying release agent on a surface of the mandrel for facilitating extraction off the mandrel; c) installing an internal layer on the mandrel; d) installing side rings on the mandrel next to the internal layer; e) fixing an end metal wire in one of the side rings; f) fixing an impregnated insulation tape or a few impregnated insulation tapes on the metal wire or on the mandrel and a feeding system with polymer or varnish used for impregnation; g) optionally fixing an impregnated glass fiber roving or a few impregnated glass fiber rovings on the metal wire or on the mandrel and a pretension system with the same impregnating polymer as in the previous step f); h) pouring a thermally conducting compound consisting of a mixture of a polymer the same as in the previous steps f) and g) with electrically non-conducting powder and/or chopped glass fiber on the horizontally turning mandrel; i) making a cylindrical multilayer winding with a metal wire by turning the mandrel and performing horizontal displacements with the feeding system of the metal wire; j) making an interlayer and/or side insulation by performing horizontal displacements with feeding systems of said insulation tapes; k) optionally providing reinforcement layers wound by the impregnated glass fiber rovings by performing horizontal displacements with feeding systems of said glass rovings; l) pouring said thermally conducting compound on the horizontally turning mandrel if the thermally conducting compound on the mandrel has been consumed during winding; m) curing the obtained winding by performing a curing cycle determined by the exact type of the polymer used in the winding with the mandrel turning horizontally; and n) extracting of the winding from the mandrel.