Abb Power Td & Company

Abb Inc.

Hoan Duy Le

Thomas L Linsenbardt

Norris L Hill

Thomas W Brennan

A magnet wire having differential build insulation for use in transformer coils is disclosed. The wire has a rectangular conductor with an insulation that is thicker on the top and bottom surfaces of the wire than it is on the sides. With the thicker coating on the top and bottom, the wire can be used in layer wound distribution transformer coils, both high voltage wire wound coils and low voltage wound coils, without needing additional insulation between the layers of the winding.

Magnet wire having differential build insulation

An insulated metallic strip suitable for use in the coils of power transformers and method of producing the same. Following the extrusion of a flat metallic strip of conductive material for winding into a magnet coil, the flat strip having a predetermined thickness and first and second sides bounded by a pair of fully rounded edges, the method of insulating the strip of conductive material by supporting the flat strip in a level state at a predetermined temperature in a vacuum chamber and while in the vacuum chamber applying a liquid coating of resin to the entire first side of the strip and the pair of rounded edges and extending onto the second side of the strip from each of the edges a distance at least as great as about 0.25' to prevent turn to turn discharge. Applying a liquid coating of resin to the second side of the strip at a plurality of spaced areas between the coating extending around the edges, controlling the placement and thickness of the resin coating on the strip and curing the liquid coating of resin. A flat metallic strip of conductive material coated according to this method is also disclosed.

Growing community of inventors

Cary, NC, United States of America

Hoan Duy Le