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OwnerMats Leijon, Kenneth Johannesson +5inventors
InventorsMATS LEIJON, KENNETH JOHANNESSON, STEFAN MILTON, PETER CARSTENSEN, BENGT RYDHOLM, BO HERNNAS, VIJAYA CHANDRAMOULI
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A conductor for high-voltage windings comprising a stranded conductor core surrounded an electrical high-voltage insulation comprising an inner semi-conducting layer, an insulating layer and an outer semi-conducting layer. The core being designed to ensure uniform current distribution and to counteract eddy-current losses This is achieved by an electrically insulating oxide layer being provided on a sufficient number of strands to ensure that all strands in the stranded conductor core are electrically insulated from each other.
A conductor for high-voltage windings in an electrical device comprising a conductor core, exhibiting a plurality of metallic electrically conductive strands, characterized by an electrical high voltage solid insulation arranged to surround said stranded conductor core, where said electrical insulation comprises an inner semi-conducting layer, an electrically insulation layer and an outer insulating layer, and that the metallic strands in said conductor core are electrically insulated from each other by an electrically insulation, comprising an oxide of a metal comprised in the strands, and that the electrical insulation is provided on a sufficient number of strands to ensure that all strands are electrically insulated from each other.
An electric device with a high voltage winding comprising a conductor as claimed in any of the preceding claims.
A process for preparing a conductor, comprising a conductor core exhibiting a plurality of electrically conducting metallic strands, for a high-voltage winding according to any of the preceding claims, characterized in that an electrically insulating oxide layer comprising a metal oxide is generated on the surface of a strand to be used in the stranded conductor, by forced oxidation of the metallic strand in an aqueous solution, then the strands are stranded to form said core and arranged in such a way that all strands in said core are electrically insulated from each other by the electrical insulation provided on a sufficient number of strands to ensure that all strands are electrically insulated from each other and that a solid insulation comprising, a first inner semi-conducting layer, an electrically insulation layer and a second outer semi-conducting layer, is applied around the stranded conductor core.
Dependencies are inferred from the claim text.