Processing method of self-adhesive transposed wire

Abstract

The invention discloses a processing method of a self-adhesive transposed wire. The processing method includes the following steps that a self-adhesive layer coats the wide face of a single copper flat wire body, epoxy self-adhesive paint is adopted in the self-adhesive layer, after the process of baking respectively through a self-adhesive furnace and an acetal furnace, the single face is coated by the self-adhesive paint, then an independent oven is used for baking and manufacturing, and the copper flat wire body with the self-adhesive paint on one side is obtained; a set of copper flat wire bodies with the self-adhesive paint on one side is twisted in a transposition mode through transposition heads to form a winding wire with overlapped wide faces, and insulated paper continues to wrap the outer surface of the winding wire in a winding mode, so that the self-adhesive transposed wire is obtained. According to the manufactured self-adhesive transposed conductor, after vacuum drying of a transformer coil is finished, no epoxy paint overflows on the narrow edge of the wire, namely the axial direction of the coil, and therefore the axial height of the coil is reduced, the size of the transformer is reduced, and production cost is reduced. The wires are not attached to each other, so that an oil way is smooth, heat dissipation of the coil is accelerated, and service life of the transformer is guaranteed.

Description

[0001] technical field [0002] The invention relates to a transposition wire, in particular to a processing method for a self-adhesive transposition wire. Background technique [0003] As the capacity of the transformer increases, the cross-sectional area of ​​the winding wire will also increase in a certain proportion. However, due to the limitations of many factors such as the electrical loss index, the production process conditions of the wire, and the user's use conditions, it is impossible to produce a wire with a large cross-section. , so people use multiple wires in combination, but in this way, the length of a single wire is different due to the different bending radii of the inside and outside of the wires when winding the coil, so that the electrical loss of each wire is different, and the resulting voltage is different. The drop is not the same; in order to solve this problem, the transposition wire came into being. The transposition wire is a new material widely...

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Problems solved by technology

[0003] As the capacity of the transformer increases, the cross-sectional area of ​​the winding wire will also increase in a certain proportion. However, due to the limitations of many factors such as the electrical loss index, the production process conditions of the wire, and the user's use conditions, it is impossible to produce a wire with a large cross-section. , so people use multiple wires in combination, but in this way, the length of a single wire is different due to the different bending radii of the inside and outside of the wires when winding the coil, so that the electrical loss of each wire is different, and the pressure generated The drop is not the same; in order to solve this problem, the transposition wire came into being. The transposition wire is a new material widely used in the field of transformer production in recent years. Now the transposition wire commonly used abroad is to combine multiple single The high-quality enamelled copper flat wire or paper-coated flat wire is sequentially exchanged on the special transposition wire equipment for transposition

[0004] At present, the single enamelled flat wire of self-adhesive transposition wire used for transformer coil winding is all coated with epoxy self-adhesive paint on the wide and narrow sides. The purpose is to bond the transposed wires after vacuum drying to increase The mechanical strength of the transformer in the short-circuit state, that is, the short-circuit resistance of the transformer, but there are defects in the processing method of the self-adhesive transposition wire painted on all sides of the wide and narrow sides. During the drying process of the coil, the epoxy paint on the narrow side of the wire flows out Increase the axial size, block the oil passage, affect the heat dissipation of the coil, and reduce the life of the transformer

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