Polyimide film sintered powder mica bend coated flat copper cord and manufacturing process thereof

Abstract

The invention relates to a polyimide film sintering powder and mica tape winding copper flat wire and a preparation method thereof. Two layers of insulation materials are wound outside a metal wire, the inner layer is a sintered polyimide film, and the outer layer is a mica tape. The electromagnetic wire has good voltage and heat resistance, high mechanical strength and strong corona resistance. The preparation method comprises the following technical routes: conductor straightening, conductor polishing, film winding, high-frequency heating, melting, adhesive sealing, mica tape winding and rolling. The invention integrates the production technical routes by improving a high-frequency device, a mica winding device and other devices, the quality of the copper flat wire is ensured, meanwhile, the mechanical property of the copper flat wire is increased, the production flow is shortened, and the production efficiency is increased. The invention is suitable for composite insulation winding coils of large-sized motors and electric appliances, such as wind driven generators, and the like.

Description

technical field [0001] The invention relates to an insulating structure of an electromagnetic coil wire and a manufacturing method thereof, in particular to an insulating structure of a polyimide film sintered powder mica tape wrapped copper flat wire and a manufacturing method thereof. Background technique [0002] The electromagnetic wire used in wind power generation is one of the key technologies of wind power generation. At present, the electromagnetic wire used in European wind power generators is mainly polyester film mica wire. The insulation structure is that the conductor is first wrapped with a layer of polyester film, and then Wrap a layer of mica tape around. This kind of insulation structure has good voltage resistance and corona resistance performance, but in use, because the polyester film is easy to hydrolyze, the moisture resistance performance is not good. [0003] The traditional production process to produce the electromagnetic wire with this kind of in...

AI Technical Summary

Problems solved by technology

Its disadvantages are: multiple take-up and take-off and intermittent production have adverse effects on the continuous refining and adhesion of the insulating layer, and excessive bending caused by multiple take-up and take-off will seriously affect the mica tape wrapping film The mechanical properties of sintered copper flat wires cause defects such as excessive rigidity and ultimately cannot meet the requirements of use

In actual production, the high-frequency voltage will fluctuate at different time periods. When the high-frequency output current remains unchanged, the fluctuation of the high-frequency voltage will inevitably lead to fluctuations in the high-frequency output power, which will eventually cause temperature fluctuations on the surface of the core.

In addition, in the case of constant high-frequency power, changes in the external environment will also affect the temperature of the core surface

Uncontrollable temperature will inevitably lead to fluctuations in product quality

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