CN203490963U - Special shaped single-surface self-adhesive enameled composite wire - Google Patents
Special shaped single-surface self-adhesive enameled composite wire Download PDFInfo
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- CN203490963U CN203490963U CN201320326334.9U CN201320326334U CN203490963U CN 203490963 U CN203490963 U CN 203490963U CN 201320326334 U CN201320326334 U CN 201320326334U CN 203490963 U CN203490963 U CN 203490963U
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- flat conductors
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Abstract
The utility model provides a special shaped single-surface self-adhesive enameled composite wire which can solve a problem that tip partial discharge is easy to occur to fillets r of an upper single wire conductor and a lower single wire conductor on a radial direction of existing single-surface self-adhesive enameled composite wires. The composite wire comprises at least two metal flat conductors. Width of a section of the metal flat conductor is a, and thickness is b. Four corners of the section are standard fillets. At least two metal flat conductors are coated with insulating paint. At least two metal flat conductors are stacked and combined along a thickness direction of a wide surface, and then are wrapped by insulating paper. Two adjacent metal flat conductors are bonded by a self-adhesive paint layer. The composite wire is characterized in that at least two metal flat conductors comprise an outer side metal flat conductor disposed on two end portions of the thickness direction, radius of two standard fillets on outer side ends of the outer side end metal flat conductor in a thickness direction is R, and radius of the two standard fillets on inner side ends in the thickness direction is r, and R>r.
Description
Technical field
The utility model relates to the production technical field of composite conductor, especially relates to the production technical field of the unidirectional self-adhesion enamel-cover composite conductor that is applied to large-capacity power transformer, is specially the unidirectional self-adhesion enamel-cover of a kind of abnormal shape composite conductor.
Background technology
Along with the development of large-capacity power transformer, beyond coil raising mechanical strength, Short Circuit withstand and shock proof ability, also require the loss of transformer more and more lower.Wherein point discharge phenomenon is a kind of of partial discharge of transformer loss, when certain part of conductor is done very carefully very sharply, the radius of curvature of tip portion is little, it is relatively large that transposition moves to this charge density, at tip portion, even some is crowded, has portions of electronics from tip, to overflow in crowded, so just caused point discharge phenomenon, this electric discharge can be deep into the interlayer of insulating board, finally causes transformer to have breakdown danger.General, enamel-cover composite conductor often applies to the high-pressure section at transformer two ends, existing single side self enamel-cover composite conductor is by 2～4 radial combinations of single side self enameled sheet wire, and wrapped paper insulation layer 5 forms outside, see Fig. 1, single single side self enameled sheet wire conductor 12 wherein, its for section thickness be a, width is the rectangle conductor of b, and Si Ge angle, cross section end is the standard fillet 13 that radius is r, conductive surface applies insulation enamelled coating 4, outer painting self-adhesive layer 6, the feature of this structure is bonded together adjacent single enameled sheet wire by the cohesive force of self-adhesive layer, can improve the mechanical strength of composite conductor, thereby improve the mechanical strength of transformer coil, Short Circuit withstand and shock proof ability, but the conductor of this kind of rectangle structure, at fillet r place, easily there is most advanced and sophisticated partial discharge phenomenon, to transformer, bring potential safety hazard.
Summary of the invention
For the problems referred to above, the utility model provides a kind of special-shaped single side self enamel-cover composite conductor, and the problem of most advanced and sophisticated partial discharge easily appears in its fillet r place that can solve two single line conductors up and down of the radial direction of existing single side self enamel-cover composite conductor.
Its technical scheme is such, it comprises at least two metal flat conductors, the cross-sectional width of described metal flat conductor is a, thickness is b, four angle ends in the cross section of described metal flat conductor are standard fillet, described at least two metal flat conductors are all evenly coated with insulating varnish outward, described at least two metal flat conductors are wrapped by insulating paper after its wide through-thickness stack combinations, between adjacent described two described metal flat conductors, by self-adhesion enamelled coating, bond, it is characterized in that: described at least two metal flat conductors comprise the outside metal flat conductor that is positioned at thickness direction both ends, its radius that is positioned at two described standard fillets of thickness direction outboard end of described outboard end metal flat conductor is R, its radius that is positioned at two standard fillets of thickness direction medial extremity is r, and R > r.
It is further characterized in that:
Between described two outside metal flat conductors, be also provided with mid portion metal flat wire, four angle ends in the cross section of described mid portion metal flat conductor are the standard fillet that radius is r;
Described R=1/2a;
The width of described self-adhesion enamelled coating is 1/3～2/3 of described metal flat cross-sectional area of conductor width a.
Compare with existing single side self enamel-cover composite conductor, the beneficial effects of the utility model are: its outboard end metal flat conductor, the radius that is positioned at two described standard fillets of thickness direction outboard end is R, the radius of four standard fillets of mid portion metal flat conductor, and the radius that outboard end metal flat conductor is positioned at two standard fillets of thickness direction medial extremity is r, and due to R > r, thereby it has increased the radius of curvature at composite conductor fillet place, thereby reduced the charge density at fillet r place, avoided the danger of the insulation breakdown that point discharge phenomenon causes, guaranteed the safe operation of transformer, and the width of self-adhesion enamelled coating is 1/3～2/3 of described metal flat cross-sectional area of conductor width a, can guarantee that composite conductor there will not be He Zhai limit, r angle to be subject to the pollution of self-adhesion paint in Constant pressure drying processing procedure, thereby avoided partial discharge and caused that minor insulation is aging, guaranteed the quality of final products transformer.
Accompanying drawing explanation
Fig. 1 is existing single side self enamel-cover composite conductor cross section structure schematic diagram;
Fig. 2 is the cross section structure schematic diagram of a kind of special-shaped single side self enamel-cover composite conductor of the utility model.
Embodiment
See Fig. 2, the utility model comprises at least two metal flat conductors, in the composite conductor of the present embodiment, include three metal flat conductors, these three metal flat conductors are divided into the outside metal flat conductor 1 that is positioned at thickness direction both ends, 3 and mid portion metal flat conductor 2, the cross-sectional width of three metal flat conductors is a, thickness is b, and metal flat conductor is all evenly coated with insulating varnish 4 outward, three metal flat conductors 1, 2, 3 after its wide through-thickness stack combinations by insulating paper wrapped 5, between adjacent two metal flat conductors, by self-adhesion enamelled coating 6, bond, outboard end metal flat conductor 1, 3 are positioned at two standard fillets 7 of thickness direction outboard end, 8 radius is R, the radius 9 of four standard fillets of mid portion metal flat conductor 2, and outboard end metal flat conductor 1, 3 are positioned at two standard fillets 10 of thickness direction medial extremity, 11 radius is r, and R > r, R=1/2a, the width of self-adhesion enamelled coating 6 is 1/3～2/3 of metal flat cross-sectional area of conductor width a.In the utility model, the radius r of metal flat conductor angle end standard fillet is determined by the regulation of national standard < < GB/T 7673-2008 paper bag winding wire > >.
Claims (4)
1. a special-shaped single side self enamel-cover composite conductor, it comprises at least two metal flat conductors, the cross-sectional width of described metal flat conductor is a, thickness is b, four angle ends in the cross section of described metal flat conductor are standard fillet, described at least two metal flat conductors are all evenly coated with insulating varnish outward, described at least two metal flat conductors are wrapped by insulating paper after its wide through-thickness stack combinations, between adjacent described two described metal flat conductors, by self-adhesion enamelled coating, bond, it is characterized in that: described at least two metal flat conductors comprise the outside metal flat conductor that is positioned at thickness direction both ends, its radius that is positioned at two described standard fillets of thickness direction outboard end of described outboard end metal flat conductor is R, its radius that is positioned at two standard fillets of thickness direction medial extremity is r, and R > r.
2. a kind of special-shaped single side self enamel-cover composite conductor according to claim 1, it is characterized in that: between described two outside metal flat conductors, be also provided with mid portion metal flat wire, four angle ends in the cross section of described mid portion metal flat conductor are the standard fillet that radius is r.
3. a kind of special-shaped single side self enamel-cover composite conductor according to claim 1 and 2, is characterized in that: described R=1/2a.
4. a kind of special-shaped single side self enamel-cover composite conductor according to claim 3, is characterized in that: the width of described self-adhesion enamelled coating is 1/3～2/3 of described metal flat cross-sectional area of conductor width a.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320326334.9U CN203490963U (en) | 2013-06-07 | 2013-06-07 | Special shaped single-surface self-adhesive enameled composite wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320326334.9U CN203490963U (en) | 2013-06-07 | 2013-06-07 | Special shaped single-surface self-adhesive enameled composite wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203490963U true CN203490963U (en) | 2014-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320326334.9U Expired - Lifetime CN203490963U (en) | 2013-06-07 | 2013-06-07 | Special shaped single-surface self-adhesive enameled composite wire |
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| Country | Link |
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| CN (1) | CN203490963U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103325448A (en) * | 2013-06-07 | 2013-09-25 | 无锡锡洲电磁线有限公司 | Special-shaped single-surface self-adhesion enameled and combined wire |
-
2013
- 2013-06-07 CN CN201320326334.9U patent/CN203490963U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103325448A (en) * | 2013-06-07 | 2013-09-25 | 无锡锡洲电磁线有限公司 | Special-shaped single-surface self-adhesion enameled and combined wire |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140319 |