Double-imine copper lapped flat wire and production process thereof

Abstract

The invention discloses a production process of a double-imine copper lapped flat wire. The production process of the double-imine copper lapped flat wire comprises the following steps: (1) constant tension paying-off; (2) straightening and cleaning; (3) coating anti-oxidation material; (4) lapping double layers of polyimide films; (5) lapping glass fibers; (6) impregnating varnish; (7) baking in an oven; (8) coating an adhesive layer; and (9) cooling through cold air, online detection of voltage, metering and constant tension paying-off. The production process of the double-imine copper lapped flat wire is simple, an insulator outside the double-imine copper lapped flat wire comprises double layers of the polyimide films, an insulation layer mixed with the glass fibers and the impregnating varnish and an acetal adhesive layer from inside to outside, and is good in sealing performance. The double-imine copper lapped flat wire is good in insulation performance, high in puncture voltage value which reaches more than 9000 V, and good in heat resistance, the quality problems such as crack and fiber-falling are not easy to occur, the phenomenon of puncturing among turns does not occur in the winding process of a coil, and the mechanical damage is small.

Description

technical field [0001] The invention relates to a winding wire product structure and a production process in the wire and cable industry, in particular to a double-imide wrapped copper flat wire and a production process thereof. Background technique [0002] Based on the strict requirements for the inter-turn quality of high-voltage motors, the high attention to inter-turn overvoltage and its hazards, the stator coils of 6KV, 10KV, and 15KV motors use bow-shaped transposition or N-shaped transposition during the winding process. In practice, in order to reduce the number of transpositions, the bow or N-shape method is mainly used. [0003] The existing stator coils generally use a self-adhesive double-glass fiber single-layer polyimide film to wrap the wire, because this kind of product has good heat resistance, good radiation resistance, thin and uniform insulation layer thickness, and good sealing performance. The wire has high moisture-proof performance, electrical perfo...

AI Technical Summary

Problems solved by technology

However, during the turn-to-turn production test of bow-shaped and N-shaped transposed coils, due to the high turn-to-turn test voltage of the coil, there is always the possibility of mechanical damage to the winding wire in the coil winding process, resulting in the possibility of inter-turn breakdown Phenomenon

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