CN203535993U

CN203535993U - PET film insulation composite conductor for transformer

Info

Publication number: CN203535993U
Application number: CN201320725397.1U
Authority: CN
Inventors: 李雄壮; 寇建立; 蔡宇星; 侯玉卿; 李志伟; 李�浩; 张雁坤; 赵葛
Original assignee: Baoding Tianwei Group Co Ltd
Current assignee: Baoding Tianwei Group Co Ltd
Priority date: 2013-11-18
Filing date: 2013-11-18
Publication date: 2014-04-09
Anticipated expiration: 2023-11-18

Abstract

The utility model relates to a PET film insulation composite conductor for a transformer, and belongs to the technology field of transformer winding conductors. The technical scheme is characterized in that, each bare copper flat wire (1) is wrapped in a single wire PET film insulation layer (4), two bare copper flat wires wrapped in single wire PET film insulation layers are closer to each other on the longer sides of the rectangular structures, and are combined to form the composite conductor. The composite conductor is wrapped in a composite wire PET film insulation layer (5). For production of insulation winding wires, the positive pressure state is kept, an antistatic facility is provided, and internal gas is moistened and clean. The PET film insulation composite conductor is advantageous in that, the PET film is prevented from adsorption of dust particles, and high cleanness of the PET film is guaranteed. Since the transformer coils operate in a non-oil-immersed environment, a clean production environment ensures good explosion-proof performance and insulating performance of an electromagnetic wire. Stable performance is provided, and high and stable paint film insulating performance guarantees good insulating effect among strands and turns of coils, and prevents short circuits.

Description

PET polyester film insulated combied conductor for a kind of transformer

Technical field

The utility model relates to PET polyester film insulated combied conductor for a kind of transformer, for making Transformer Winding, belongs to Transformer Winding lead technology field.

Background technology

PET polyester film is called for short PET film, is to take PETG as raw material, adopts extrusion molding to make sheet, then the thin-film material of making through biaxial tension; High performance PE T polyester film insulated combied conductor is to take high-yield strength composite conductor as basis, outsourcing PET polyester film forms, at present, in electromagnetic wire industry, mostly PET polyester film insulated combied conductor is that common transposition core outsourcing PET polyester film forms, in process of production because PET polyester film has adsorptivity, in production process, easily adsorb impurity, affect properties of product.Because Transformer Winding coil moves in non-oil immersion environment, common production environment can not guarantee explosion-proof and the insulating properties that electromagnetic wire is good, common transposition core can not guarantee the Short Circuit withstand impact capacity of coil, resistivity has just determined the operating thermal losses of coil, and the size of percentage elongation has determined the winding process of coil simultaneously; Paint film insulation property have determined between coil thigh, the insulation effect of turn-to-turn and the possibility being short-circuited.Requirement to PET polyester film insulated combied conductor performance is also more and more higher, and the PET polyester film insulated combied conductor that background technology is produced can not meet the requirement of Transformer Winding.

Utility model content

The utility model object is to provide PET polyester film insulated combied conductor for a kind of transformer, guarantee that internal gas is moistening, clean, not contaminated, prevent PET polyester film absorption micronic dust, guarantee between transformer coil thigh, turn-to-turn has good insulation effect, be not short-circuited, solve the problem existing in background technology.

The technical solution of the utility model is:

PET polyester film insulated combied conductor for a kind of transformer, comprise bare copper flat wire, wire contact-making surface R angle, wire noncontact face R angle, single line PET polyester film insulating barrier and assemble line PET polyester film insulating barrier, the cross section of bare copper flat wire is rectangular configuration, four angles are all provided with chamfering, the every coated single line PET polyester film insulating barrier in bare copper flat wire outside; The bare copper flat wire rectangular configuration longer sides of two coated single line PET polyester film insulating barriers is close, combines, and forms composite conductor; Long two chamferings on one side that bare copper flat wire cross section rectangular configuration is close together are wire contact-making surface R angle, away from long two chamferings be on one side wire noncontact face R angle, every bare copper flat wire cross section rectangular configuration all has two wire contact-making surface R angles and two wire noncontact face R angles; The radius at the wire contact-making surface R angle of two bare copper flat wires is less than wire noncontact face R angular radius; The described coated assemble line PET polyester film insulating barrier in composite conductor outside.

The radius at described wire contact-making surface R angle is-15% to-20% of plain conductor R angular radius; Wire noncontact face R angular radius is 15% to 20% of plain conductor R angular radius.

The specification of wire is different, and plain conductor R angular radius is respectively 0.5,0.65,0.8,1.0 mm.

Described bare copper flat wire is used the method for the first rear drawing of extruding to produce, the stress R of conductor when plastic elongation rate is 0.2% _p0.2more than reaching 260Mpa, and resistivity is less than 0.017241 Ω mm ²/ m, percentage elongation is greater than 18%, and high-yield strength has improved the Short Circuit withstand impact capacity of coil greatly, and low-resistivity has reduced the operating thermal losses of coil, and meanwhile, percentage elongation is greater than 18% winding process that has guaranteed coil.

The beneficial effects of the utility model are: the utility model prevents PET polyester film absorption micronic dust, guarantee PET polyester film high-cleanness, because transformer coil moves in non-oil immersion environment, clean production environment has guaranteed that electromagnetic wire has good explosion-proof and insulating properties, and stable performance, high and stable paint film insulation property, have guaranteed between coil thigh, turn-to-turn has good insulation effect, are not short-circuited.

Accompanying drawing explanation

Fig. 1 is the utility model product cross section schematic diagram;

In figure: 1, bare copper flat wire; 2, wire contact-making surface R angle; 3, wire noncontact face R angle; 4, single line PET polyester film insulating barrier; 5, assemble line PET polyester film insulating barrier.

Embodiment

Below in conjunction with accompanying drawing, by embodiment, the utility model is described in further detail.

PET polyester film insulated combied conductor for a kind of transformer, comprise bare copper flat wire 1, wire contact-making surface R angle 2, wire noncontact face R angle 3, single line PET polyester film insulating barrier 4 and assemble line PET polyester film insulating barrier 5, the cross section of bare copper flat wire is rectangular configuration, four angles are all provided with chamfering, the every coated single line PET polyester film insulating barrier in bare copper flat wire outside; The bare copper flat wire rectangular configuration longer sides of two coated single line PET polyester film insulating barriers is close, combines, and forms composite conductor; Long two chamferings on one side that bare copper flat wire cross section rectangular configuration is close together are wire contact-making surface R angle, away from long two chamferings be on one side wire noncontact face R angle, every bare copper flat wire cross section rectangular configuration all has two wire contact-making surface R angles and two wire noncontact face R angles; The radius at the wire contact-making surface R angle of two bare copper flat wires is less than wire noncontact face R angular radius; The described coated assemble line PET polyester film insulating barrier in composite conductor outside.

Execution mode more specifically:

1) according to PET polyester film insulated combied conductor manufacturing requirements for transformer, determine the specification of PET polyester film insulated combied conductor for transformer, use the mode of the first rear drawing of extruding to produce bare copper flat wire;

2) bare copper flat wire is coated with high withstand voltage paint film outward;

3) that production interior volume is filled is moistening, clean, contaminated gas not, keeps barotropic state also to add antistatic facility, and the cross section of bare copper flat wire is rectangular configuration, and four angles are all provided with chamfering, the every coated single line PET polyester film insulating barrier in bare copper flat wire outside; The bare copper flat wire rectangular configuration longer sides of two coated single line PET polyester film insulating barriers is close, combines, and forms composite conductor; Long two chamferings on one side that bare copper flat wire cross section rectangular configuration is close together are wire contact-making surface R angle, away from long two chamferings be on one side wire noncontact face R angle, every bare copper flat wire cross section rectangular configuration all has two wire contact-making surface R angles and two wire noncontact face R angles; The radius at the wire contact-making surface R angle of two bare copper flat wires is less than wire noncontact face R angular radius; The described coated assemble line PET polyester film insulating barrier in composite conductor outside;

4) on take-up reel, carry out rolling.

Claims

1. PET polyester film insulated combied conductor for a transformer, it is characterized in that: comprise bare copper flat wire (1), wire contact-making surface R angle (2), wire noncontact face R angle (3), single line PET polyester film insulating barrier (4) and assemble line PET polyester film insulating barrier (5), the cross section of bare copper flat wire is rectangular configuration, four angles are all provided with chamfering, the every coated single line PET polyester film insulating barrier in bare copper flat wire outside; The bare copper flat wire rectangular configuration longer sides of two coated single line PET polyester film insulating barriers is close, combines, and forms composite conductor; Long two chamferings on one side that bare copper flat wire cross section rectangular configuration is close together are wire contact-making surface R angle, away from long two chamferings be on one side wire noncontact face R angle, every bare copper flat wire cross section rectangular configuration all has two wire contact-making surface R angles and two wire noncontact face R angles; The radius at the wire contact-making surface R angle of two bare copper flat wires is less than wire noncontact face R angular radius; The described coated assemble line PET polyester film insulating barrier in composite conductor outside.

2. PET polyester film insulated combied conductor for a kind of transformer according to claim 1, the radius that it is characterized in that described wire contact-making surface R angle is-15% to-20% of plain conductor R angular radius; Wire noncontact face R angular radius is 15% to 20% of plain conductor R angular radius.