Transformer high temperature index self-adhering transposition conductor and preparation method thereof

Abstract

Provided is a transformer high temperature index selfadhesive transposed conductor and the preparation method, belonging to the technical field of the transformer, which solves the problems of low transposed conductor high temperature bonding strength, with the technical projects of consisting of a plurality of enamelling copper flat wire, wherein the surface of the enamelling copper flat wire is coated with the acetal paint film and the selfadhesive paint film from the interior to the exterior. The invention is improved in that, the selfadhesive paint composing the selfadhesive paint film is made of the following materials by weight: low molecular weight epoxy resin 140-160, bisphenol A90-100, quaternary ammonium salt 0.90, cresol 290-310, phenol 260-280, dimethylbenzene 370-390, aminoresin 3-4. The transposed conductor prepared according to the invention has the bonding strength in the operation temperature 75% of that in the normal temperature, and the integral bending strength is two times than that before drying, so the transposed conductor transformer advances the mechanical strength and the anti-short circuit ability of the winding, to bear larger electromagnetic force, thereby prolonging the service life of the transformer.

Description

technical field [0001] The invention relates to a conductive material and a preparation method, in particular to a high-temperature-resistant self-adhesive transposition wire used for transformer coils, and belongs to the technical field of transformers. Background technique [0002] At present, self-adhesive transposed wires are often used as winding coils in large transformers, and their adhesiveness can improve the overall strength of the transposed wires after they are wound into coils, avoid coil deformation when the transformer is impacted by current, and improve the stability of transformer operation. Ordinary self-adhesive transposed wires can achieve high bonding strength at room temperature, but under the operating conditions of the transformer, the bonding strength gradually decreases with the increase of the ambient temperature. When the temperature reaches 105 degrees, the two self-adhesive enameled The adhesive strength of the flat wire is only about 3% of the ...

AI Technical Summary

Problems solved by technology

Ordinary self-adhesive transposed wires can achieve high bonding strength at room temperature, but under the operating conditions of the transformer, the bonding strength gradually decreases with the increase of ambient temperature. When the temperature reaches 105 degrees, the two self-adhesive enamelled wires The adhesive strength of the flat wire is only about 3% of the strength at room temperature. In other words, the ordinary self-adhesive transposed wire has very little adhesive force when the transformer is running.