Special electromagnetic wire and preparation method thereof

Abstract

The invention belongs to the technical field of electromagnetic wires and discloses a special electromagnetic wire and a preparation method thereof. The special electromagnetic wire is prepared through the steps of paying off, oil immersion, preheating, high-temperature extrusion, cooling, take-up and the like. According to the preparation method of the special electromagnetic wire provided by theinvention, the adhesive force between an insulating layer and a wire is improved, the preparation process is environment-friendly, the operation is simple, and the prepared special electromagnetic wire is thin in the insulating layer, uniform in thickness and smooth in surface, and has the characteristics of excellent wear resistance, good toughness, high voltage resistance value, long corona resistance time, hydrolysis resistance and radiation resistance. The preparation method of the special electromagnetic wire is suitable for producing the special electromagnetic wire, and the prepared special electromagnetic wire is suitable for motor equipment.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic wires, and relates to an insulating layer of electromagnetic wires, in particular to a special electromagnetic wire and a preparation method thereof. Background technique [0002] The motor equipment is the heart of the power device, and the quality of the magnet wire determines the service life of the motor, and the performance of the insulating layer material determines the quality of the magnet wire. At present, the temperature resistance level of enameled wire with thinner insulating layer among common domestic electromagnetic wires is up to 240°C. If motors are to be used in special fields, the temperature resistance level of electromagnetic wires must be increased, such as polyphenylene sulfide (PPS), Special engineering plastics with high comprehensive performance such as polyimide (PI), polyether ether ketone (PEEK), liquid crystal polymer (LCP) and polysulfone (PSF) are used as in...

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Problems solved by technology

[0003] The use of special engineering materials with high temperature resistance as insulating materials is a necessary condition for improving the temperature resistance of electromagnetic wires, and special engineering materials as insulating layers already have good wear resistance, radiation resistance, good toughness, and voltage resistance. High value, long corona resistance and other properties, the special electromagnetic wire with a single insulating layer on the market generally adopts the traditional thermal radiation heating method to preheat the copper wire to 120-150 ℃, and the heating time is 8-10s, which is easy The surface of the copper wire is oxidized and blackened, and the oxidation is uneven, which affects the adhesion of the insulating layer on the subsequent copper wire, and cannot accurately control the temperature of the copper wire after preheating. If the temperature is too low, the insulating layer is on the electromagnetic wire. If the crystallization is too early, it will affect the performance, if the temperature is too high, it will cause the insulation layer to decompose

In the prior art, an intermediate layer with good adhesion to the copper conductor and good adhesion to the polyether ether ketone insulating layer is generally used between the polyether ether ketone insulating layer and the copper conductor, but the composite insulating layer will As a result, the insulation layer of the magnet wire is thicker, which is not conducive to the current miniaturization requirements of the motor in the field of new energy vehicles.

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