CN217361179U

CN217361179U - Interturn thin insulation four-combined wire

Info

Publication number: CN217361179U
Application number: CN202220631887.4U
Authority: CN
Inventors: 张国祥; 张龙; 黄新书; 祝世硕; 郑峰; 倪志文
Original assignee: Tianjin Jingwei Power Technology Co ltd
Current assignee: Tianjin Jingwei Power Technology Co ltd
Priority date: 2022-03-23
Filing date: 2022-03-23
Publication date: 2022-09-02
Anticipated expiration: 2032-03-23

Abstract

The utility model belongs to the technical field of at the wire, concretely relates to thin insulating four combination wire between circle, including naked copper flat wire, single naked copper flat wire is around a package single and is 15 ~ 20mm around the package pitch, and four are combined with the wide face contact of wire around a single naked copper flat wire after the package, outside is around package insulated paper, is 13 ~ 15mm around the package pitch. The interturn thin insulating four-combined wire is reasonable in design and simple in structure, the problem that the four-combined wire is partially exploded when the transformer is wound is solved, the winding difficulty of the transformer is reduced, the product use quality of the four-combined wire is improved, and meanwhile, the winding efficiency of the transformer is improved.

Description

Interturn thin insulation four-combined wire

Technical Field

The utility model belongs to the technical field of at the wire, concretely relates to thin insulating four composite wire between circles.

Background

The winding is the core of the transformer circuit part and is one of the key materials for ensuring the long-term reliable operation of the transformer; the form of the winding is mainly selected according to the voltage grade and the capacity of the transformer, and meanwhile, the characteristics of the windings in various forms are also considered; such as the size of the heat dissipating surface, the electrical strength (mainly referred to as impact performance) and the mechanical strength, and the manufacturability of the manufacturing process. The large winding adopts a transposed conductor, so that the additional loss of the winding can be reduced, the overall dimension of the winding is reduced, and the volume of the transformer is reduced, but the transposed conductor is woven by a plurality of strands of small-section self-adhesive acetal flat wires, the price of the enameled flat wire is high, meanwhile, the manufacturing process and welding of the transposed conductor are complex, the current transformer coil is designed to adopt a combined conductor, and particularly, most of a high-voltage coil adopts the combined conductor as a winding material; because the requirement on the insulation between the strands of the parallel wires is low and the requirement on the turn-to-turn insulation is high, the combined wire is just based on the principle that the strands are combined by adopting thin insulation and then coated with public insulation. The measure achieves the economic effects of reducing the size of the winding and the loss like transposition and disconnection, and overcomes the defects of transposition wires, so that the transposition wires are widely used at present. The conventional combined conducting wire product adopts two or three paper-covered flat wires to form a row with overlapped and contacted wide surfaces, and is wrapped into a strand of winding wire by electrical insulating paper; as the demand for transformer design voltage class and capacity increases, the cross section of the transformer winding also needs to increase; therefore, the four combined wires can gradually enter the category of the designed winding of the transformer; because the four-combined lead adopts the design experience of two-combined lead and three-combined lead, in addition, in order to improve the short circuit resistance of the transformer coil, a single lead is hardened; when a coil is wound by the transformer, due to the factors of large internal stress of a single wire, thin package insulation and the like, the problems of difficult winding, local explosion and the like and high repair difficulty often occur, and great difficulty is brought to the winding of the transformer; meanwhile, the design of the transformer by adopting 4 combined wires brings certain troubles.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a thin insulating four combination wires between circles to solve the problem that exists among the background art.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a turn-to-turn thin insulating four combined wire, includes bare copper flat wire, and single bare copper flat wire is around a single insulating paper of lapping, and the pitch of lapping is 15 ~ 20mm, and four single bare copper flat wires after lapping are with the wire broadside contact after making up, and outside is around lapping insulating paper, and the pitch of lapping is 13 ~ 15 mm.

Preferably, the bare copper flat wire is extruded by using a TU2R oxygen-free copper rod with the diameter of 12.50 mm.

The utility model has the advantages that: the winding pitch of the system insulation is changed by changing the turn-to-turn thin-insulation four-combined lead, so that the internal stress release of the four-combined lead during the winding of the transformer does not exceed the tensile strength of an insulating material in the single winding pitch, the problem that the four-combined lead is locally exploded during the winding of the transformer is solved, the winding difficulty of the transformer is reduced, the product use quality of the four-combined lead is improved, and meanwhile, the winding efficiency of the transformer is improved.

The interturn thin-insulation four-combined wire is reasonable in design and simple in structure, the problem that the four-combined wire is partially exploded when the transformer is wound is solved, the winding difficulty of the transformer is reduced, the winding efficiency of the transformer is improved while the product use quality of the four-combined wire is improved, and the application effect is very remarkable.

Drawings

Fig. 1 is a front view of the present invention;

fig. 2 is a side view of the present invention.

Detailed Description

The following detailed description of the preferred embodiments of the present invention is provided in connection with the accompanying drawings.

As shown in fig. 1 and 2, the turn-to-turn thin-insulation four-combined wire comprises a bare copper flat wire 1, a single bare copper flat wire is wrapped with a single piece of wrapping insulation paper 2, the wrapping pitch 4 of the single piece of wrapping insulation paper is 15-20 mm, four wrapped single bare copper flat wires are combined through wide-surface contact of wires, the outer portion is wrapped with insulation paper 3, and the wrapping pitch 5 of the wrapped insulation paper is 13-15 mm.

The specific preparation method comprises the following steps:

preparing raw materials, using TU with phi 12.50mm ₂ R is an oxygen-free copper rod, and a semi-finished bare copper flat wire is produced by adopting an extrusion process; the mutual difference of the shapes of the bare conductors produced by extrusion is less than or equal to 0.01 mm;

paying off the bare copper flat wire, hardening, wiping the bare copper flat wire, and then, winding the bare copper flat wire into a single winding, wherein the winding pitch is controlled to be 15-20 mm;

after the wide-surface contacts of the single paper-coated wire are combined, wrapping insulation paper on the wire in a wrapping mode, wherein the wrapping pitch of the insulation paper is controlled to be 13-15 mm;

then, winding the wire on a take-up reel through traction and take-up to form a finished product;

testing the size, the insulation thickness, the external dimension, the wrapping pitch, the package insulation tensile strength, the yield strength and the bending of each batch of wires; the test indexes are as follows:

conductor size: 1.75 mm plus or minus 0.03 mm; 12.00 +/-0.07 mm; the shape difference of the conductors is less than or equal to 0.01 mm;

insulation thickness: the single insulation thickness is 0.30(+0/-0.03) mm, and the total package insulation thickness is 0.50 +/-0.06 mm;

the external dimension is as follows: the thickness is 8.70 mm plus or minus 0.05 mm; the width is 12.8 mm plus or minus 0.05 mm;

the lapping pitch is less than or equal to 15 mm;

yield strength of 130-150N/mm ² ；

Bending: 2 circles of wires are wound on the diameter of a rod with the diameter of 1000mm, and the condition that the wires are combined to form 4 cannot be obviously distorted, deformed and burst;

the lead meeting the performance test and the standard requirement of IEC 60317-27 is a qualified product.

It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. The interturn thin insulating four-combined wire is characterized by comprising a bare copper flat wire, wherein a single bare copper flat wire is wrapped with a single piece of wrapping insulating paper, the wrapping pitch is 15-20 mm, four wrapped single bare copper flat wires are combined in a mode of wide-surface contact of the wires, the outside is wrapped with the insulating paper, and the wrapping pitch is 13-15 mm.

2. The interturn thin insulating four-combined lead wire as claimed in claim 1, wherein the bare copper flat wire is extruded by using TU2R oxygen-free copper rod with a diameter of 12.50 mm.