Enamelled wire for network transformer

Abstract

The invention relates to an enamelled wire for a network transformer, which comprises a copper core conductor and a high temperature-resistant polyurethane coating layer as well as a neloy paint layer which are arranged out of the copper core conductor, wherein the volume of the high temperature-resistant polyurethane coating layer and the neloy paint layer is 40-60% of that of the enamelled wire for the network transformer; and the volume of the neloy paint layer is 1-3% of that of the enamelled wire. The manufacture method of the enamelled wire comprises the following steps of: firstly dragging copper material to be a naked copper wire; cleaning and annealing the naked copper wire; coating an insulated paint layer with a felt and baking, wherein the paint is coated at 15-20 ways, the paint is coated for once, and the baking is performed for once; and coating a layer of the neloy paint layer on the surface of the insulating paint layer and baking. The enamelled wire has the advantages of thick paint film, high voltage resistance, large elongation percentage, large tensile strength and the like, and can be applied to electric devices with high correlative machining requirement, small space requirement and the like such as the network transformer and the wave filter, etc.

Description

technical field [0001] The invention relates to the technical field of enameled wires, in particular to an enameled wire for a network transformer. Background technique [0002] Existing enameled wires can already use copper cores as conductors, and the surface is coated with a single-layer or multi-layer polyurethane insulating layer. This type of enameled wire is widely used in products such as motors, audio, and magnetic devices. With the continuous innovation of electronic technology, network magnetic devices (transformers) are also developing in the direction of short, small, light and thin, and their performance requirements are also increased accordingly, and the performance of this communication transformer is closely related to the performance of the enameled wire used. of. [0003] However, the existing enameled wires often have problems such as poor voltage resistance, low tensile strength, poor elongation, and poor wear resistance after reflow soldering at about...

AI Technical Summary

Problems solved by technology

[0003] However, the existing enameled wires often have problems such as poor voltage resistance, low tensile strength, poor elongation, and poor wear resistance after reflow soldering at about 270 ° C. Therefore, in order to enhance the voltage resistance and tensile strength of such enameled wires Strength, elongation and other characteristics, usually on the surface of the enameled wire coated with a layer of Teflon or glass filament or single cotton yarn, which will lead to large product volume and poor plasticity

Another method is to use non-solderable polyesterimide and other enameled wires to enhance heat resistance and voltage resistance, but this requires multiple soldering-related processes, which is costly and cannot be applied to network transformers or filters, etc. Requirements for the increasing miniaturization of related electronic components

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