Enameled wire, production process thereof and transformer adopting enameled wire

Abstract

The invention relates to the technical field of enameled wires. The invention discloses an enameled wire, a production process thereof and a transformer adopting the enameled wire, the enameled wire comprises a core wire and a paint layer, and the paint layer is wrapped outside the core wire; the core wire is a flat wire and comprises a copper layer and an aluminum core, and the copper layer wraps the aluminum core; the inner wall of the copper layer is provided with a plurality of annular grooves which are axially arranged, and the outer wall of the aluminum core is provided with protrusions which extend into the annular grooves. The enameled wire is a flat wire with copper-clad aluminum as the core wire, the bonding strength of the copper layer and the aluminum core is improved through the multiple annular grooves formed in the copper layer and the aluminum core in the axial direction, relative movement of copper and aluminum caused by large environment temperature difference can be effectively prevented, and the running stability of a transformer is improved.

Description

Technical field [0001] The present invention involves the field of lacquer bag technology, especially for a variable line and its production process, and uses the lacquer cable. Background technique [0002] The lacquer cable is a main variety of winding lines. The winding line is a conductive metal wire with an insulating layer. After the line is softened, it is painted and baked multiple times. The core lines of the existing lacquer cable include copper, aluminum lines, copper bag aluminum lines. Among them, the performance of copper bag aluminum lacquer wires is between copper and aluminum. Essence However, due to the difference in thermal expansion coefficients of copper and aluminum, the copper layer and aluminum core will be relatively moved in the case of large environmental temperature difference, resulting in unstable operation of electrical products. [0003] On the other hand, lacquer cables are usually round lines, but there are defects with low grooves in the round l...

AI Technical Summary

Problems solved by technology

However, due to the large difference in the thermal expansion coefficients of copper and aluminum, the copper layer and the aluminum core will move relative to each other when the ambient temperature difference is large, resulting in unstable operation of electrical products

[0003] On the other hand, the enameled wire is usually a round wire, but the round wire winding has the defect of low slot fill rate, which makes it difficult to meet the requirements of light weight, low power consumption and high performance. Therefore, flat enameled wire can effectively solve this problem

The existing flat enameled wires are generally copper enameled wires or aluminum enameled wires, and copper-clad aluminum enameled wires are usually round, which limits the application of copper-clad aluminum enameled wires.

Images