CN102723180A - Low voltage coil used for dry-type transformer - Google Patents
Low voltage coil used for dry-type transformer Download PDFInfo
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- CN102723180A CN102723180A CN2012101894479A CN201210189447A CN102723180A CN 102723180 A CN102723180 A CN 102723180A CN 2012101894479 A CN2012101894479 A CN 2012101894479A CN 201210189447 A CN201210189447 A CN 201210189447A CN 102723180 A CN102723180 A CN 102723180A
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Abstract
The invention discloses a low voltage coil used for a dry-type transformer. The coil comprises a multi-turn winding wound by inductive layers and insulation layers; the adjacent conductive layers are separated by at least one layer of insulation layer; the low voltage coil further comprises an internal insulation layer and an external insulation layer located in the internal surface and external surface of the winding; the internal surfaces of the internal insulation layer and the external insulation layer are provided with a resin insulation layer; the upper and lower two ends of the internal insulation layer and the external insulation layers are higher than the winding; the upper and lower ends of the winding are located between the external and internal insulation layers and insulation resin are poured between the external and internal insulation layers. With the adoption of the low voltage coil, the appearance is more attractive, the coil is hard to be wetted; thus, both good electric and mechanical strengths are ensured; materials are saved, and the cost is greatly saved.
Description
Technical field
The present invention relates to the field of transformer, particularly relate to a kind of low-voltage coil that is used for dry-type transformer.
Background technology
Dry-type transformer is that a kind of iron core and low-voltage coil are not immersed in the transformer in the iknsulating liquid for oil-filled transformer, generally is used for localized lighting, electronic circuit.Along with the transformer user improves constantly what transformer required, the structure of transformer becomes increasingly complex, and in order to satisfy the demand of voltage, the low-voltage coil quantity on the transformer core is more and more, and cost is higher.
Along with the continuous progress of transformer technology, fully reasonable use low-voltage coil inner space has become the problem of paying close attention to most, and this has direct relation with cost.
Summary of the invention
The technical problem that the present invention mainly solves provides a kind of low-voltage coil that is used for dry-type transformer, and outward appearance is more attractive in appearance, and moisture-sensitive had not both guaranteed good electric and mechanical strength, again can material-saving, practiced thrift cost greatly.
For solving the problems of the technologies described above; The technical scheme that the present invention adopts is: provide a kind of dry-type transformer to use low-voltage coil; Comprise the winding that forms multiturn by conductive layer and insulating barrier coiling; Have at least a layer insulating to separate between the adjacent said conductive layer, said low-voltage coil also comprises inner insulating layer and the external insulation layer that is positioned at winding inner surface and outer surface, and the inner surface of said inner insulating layer and external insulation layer has resin insulating barrier; Said inner insulating layer and external insulation layer all are higher than winding in two ends up and down, and the two ends up and down of said winding also are cast with insulating resin between interior external insulation layer.
In preferred embodiment of the present invention, said low-voltage coil also comprises some air gap stays, and said air gap stay is between the conductive layer and insulating barrier of said winding mid portion, and through the axial distance of conductive layer and insulating barrier.
In preferred embodiment of the present invention, said air gap stay is strip, and the cross section is butterfly.
In preferred embodiment of the present invention, the cross section ovalize of said low-voltage coil.
In preferred embodiment of the present invention, said low-voltage coil also comprises the interior row of connection, and said interior connection ranking is in low-voltage coil inside and run through the axial two ends of low-voltage coil.
In preferred embodiment of the present invention, described insulating resin is an epoxy resin.
The invention has the beneficial effects as follows: the low-voltage coil that is used for dry-type transformer of the present invention, the two ends of winding also are cast with insulating resin between interior external insulation layer, then oven dry; Insulating end and following insulating end seal winding terminal through insulating resin in the formation, and outward appearance is more attractive in appearance; Moisture-sensitive not; Both guaranteed good electric and mechanical strength, again can material-saving, practiced thrift cost greatly.
Description of drawings
Fig. 1 is the sectional view that the present invention is used for low-voltage coil one preferred embodiment of dry-type transformer;
Fig. 2 is the low-voltage coil structural representation of dry-type transformer among Fig. 1;
Fig. 3 is the schematic cross-section of the stay of air gap shown in Fig. 1;
The mark of each parts is following in the accompanying drawing: 11, conductive layer, 12, insulating barrier, 13, inner insulating layer, 14, external insulation layer, 15, go up insulating end, 16, insulating end down, 17, the air gap stay, 18, interior connection row.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present invention is set forth in detail, thereby protection scope of the present invention is made more explicit defining so that advantage of the present invention and characteristic can be easier to it will be appreciated by those skilled in the art that.
See also Fig. 1 and Fig. 2, the invention provides a kind of low-voltage coil that is used for dry-type transformer.The low-voltage coil that this is used for dry-type transformer comprises and conductive layer 11, insulating barrier 12, inner insulating layer 13, external insulation layer 14, last insulating end 15, following insulating end 16, air gap stay 17 and interior the connection arranges 18.Wherein, conductive layer 11 is preferably with insulating barrier 12 and is laminated structure, and alternating floor carries out coiling between said conductive layer 11 and insulating barrier 12 one decks, forms the winding (not mark) of multiturn.
Mesolow coil of the present invention comprises by the winding of conductive layer 11 and insulating barrier 12 coilings formation multiturn, has at least a layer insulating 12 to separate between the adjacent conductive layer 11.Low-voltage coil among the present invention also comprises the inner insulating layer 13 and external insulation layer 14 that is positioned at winding inner surface and outer surface, and the inner surface of inner insulating layer 13 and external insulation layer 14 has resin insulating barrier (not mark).Wherein, the two ends up and down of inner insulating layer 13 and external insulation layer 14 all are higher than winding, form the placement space at two ends.This placement space, i.e. the two ends up and down of winding and between interior external insulation layer, be cast with insulating resin, oven dry then, insulating end 15 and following insulating end 16 seal winding terminal through insulating resin in formations.
Said air gap stay 17 is between the conductive layer 11 and insulating barrier 12 of said winding mid portion, and through the axial distance of conductive layer 11 and insulating barrier 12.As shown in Figure 3, the middle recessed butterfly-like structure of two ends protrusion is preferably adopted in the cross section of air gap stay 17.
Preferably; Connection row 18 in said low-voltage coil coiling cross section ovalize, said low-voltage coil also comprise, said interior connection row 18 is positioned at low-voltage coil inside and contacts with conductive layer 11; And the axial two ends of thorough coil have at least an end to stretch out low-voltage coil and can connect external equipment.
Dry-type transformer of the present invention is used the low-voltage coil structure, and after coiling was accomplished, the two ends up and down of winding also were cast with insulating resin between interior external insulation layer; Oven dry then; Insulating end 15 and following insulating end 16 seal winding terminal through insulating resin in the formation, and appearance is more attractive in appearance; Dry-type transformer protection against the tide and resistance and high temperature resistance property have been improved; And the arc resistant shape and the decay resistance that improve dry-type transformer, and then improved the electric property of dry-type transformer, ensured the safe and reliable operation of electric equipment.
Insulating resin among the present invention is an epoxy resin, and the macromolecular compound that contains epoxide group in all molecular structures is referred to as epoxy resin.Epoxy resin after the curing has good physics, chemical property, and it has excellent adhesive strength to the surface of metal and nonmetallic materials, and dielectric property are good; The set shrinkage is little, the product size good stability, and hardness is high; Pliability is better; To alkali and most of solvent-stable, thereby be widely used in national defence, national economy all departments, make purposes such as cast, dipping, lamination material, bonding agent, coating.Epoxy resin has following advantage:
(1) mechanical property is high.Epoxy resin has very strong cohesive force, and molecular structure is fine and close, so its mechanical property is higher than universal thermosetting resins such as phenolic resins and unsaturated polyester (UP);
(2) strong adhesion.Contain active epoxy radicals, hydroxyl and ehter bond, amine key, ester bond isopolarity group greatly in the epoxy resin solidifying system, give the curable epoxide thing to metal, pottery, glass, coagulation scholar, timber isopolarity base material with good adhesive force;
(3) cure shrinkage is little.Be generally 1%～2%.Be in the thermosetting resin one of minimum kind of cure shrinkage (phenolic resins is 8%～10%; Unsaturated polyester resin is 4%～6%; Organic siliconresin is 4%～8%).Linear expansion coefficient is also very little, is generally 6 * 10-5/ ℃.So it is little to solidify the back change in volume;
(4) good manufacturability.Basically do not produce the low molecular weight volatile thing during epoxy resin cure, so but low pressure molding or contact molded.Can cooperate environment-friendly type coatings such as making solvent-free, high solid, powdery paints and water paint with various curing agent;
(5) excellent electric insulation property.Epoxy resin is one of best kind of dielectric property in the thermosetting resin;
(6) good stability, chemical proof property is good.The epoxy resin of impurity such as alkali-free, salt is not perishable.As long as store proper (sealing, do not make moist, do not meet high temperature), be 1 year its storage period.Exceed the time limit the back and still can use as if being up to the standards.The curable epoxide thing has excellent chemical stability.The performance of multiple dielectric corrosions such as it is alkaline-resisting, sour, salt is superior to thermosetting resins such as unsaturated polyester resin, phenolic resins.Therefore epoxy resin is in a large number as anticorrosion priming paint, and again because of epoxy resin cured product is tridimensional network, the dipping of ability oils etc. is widely used in the integral tank inboard wall lining of oil groove, oil tanker, aircraft etc. again;
(7) thermal endurance of curable epoxide thing is generally 80～100 ℃.The heat resistant variety of epoxy resin can reach 200 ℃ or higher.
The low-voltage coil that is used for dry-type transformer that the present invention discloses, the two ends of winding also are cast with insulating resin between interior external insulation layer, then oven dry; Insulating end 15 and following insulating end 16 seal winding terminal through insulating resin in the formation, and outward appearance is more attractive in appearance; Moisture-sensitive not; Both guaranteed good electric and mechanical strength, again can material-saving, practiced thrift cost greatly.
The above is merely embodiments of the invention; Be not so limit claim of the present invention; Every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (6)
1. a dry-type transformer is used low-voltage coil; Comprise the winding that forms multiturn by conductive layer and insulating barrier coiling; Have at least a layer insulating to separate between the adjacent said conductive layer; It is characterized in that said low-voltage coil also comprises inner insulating layer and the external insulation layer that is positioned at winding inner surface and outer surface, the inner surface of said inner insulating layer and external insulation layer has resin insulating barrier; Said inner insulating layer and external insulation layer all are higher than winding in two ends up and down, and the two ends up and down of said winding also are cast with insulating resin between interior external insulation layer.
2. dry-type transformer according to claim 1 is used low-voltage coil; It is characterized in that; Said low-voltage coil also comprises some air gap stays, and said air gap stay is between the conductive layer and insulating barrier of said winding mid portion, and through the axial distance of conductive layer and insulating barrier.
3. dry-type transformer according to claim 2 is used low-voltage coil, it is characterized in that, said air gap stay is strip, and the cross section is butterfly.
4. dry-type transformer according to claim 1 is used low-voltage coil, it is characterized in that the cross section ovalize of said low-voltage coil.
5. dry-type transformer according to claim 1 is used low-voltage coil, it is characterized in that, said low-voltage coil also comprises the interior row of connection, and said interior connection ranking is in low-voltage coil inside and run through the axial two ends of low-voltage coil.
6. low-voltage coil according to claim 1 is characterized in that, described insulating resin is an epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101894479A CN102723180A (en) | 2012-06-11 | 2012-06-11 | Low voltage coil used for dry-type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101894479A CN102723180A (en) | 2012-06-11 | 2012-06-11 | Low voltage coil used for dry-type transformer |
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| Publication Number | Publication Date |
|---|---|
| CN102723180A true CN102723180A (en) | 2012-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101894479A Pending CN102723180A (en) | 2012-06-11 | 2012-06-11 | Low voltage coil used for dry-type transformer |
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| Country | Link |
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| CN (1) | CN102723180A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104217851A (en) * | 2014-09-03 | 2014-12-17 | 宁波奥克斯高科技有限公司 | End sealing method for low-voltage foil type coil of dry type transformer |
| CN105826051A (en) * | 2016-05-25 | 2016-08-03 | 常熟市常源变压器有限公司 | Foil coil for transformer |
| CN106205977A (en) * | 2016-06-24 | 2016-12-07 | 苏州华冲精密机械有限公司 | Low-voltage coil for transformator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201146095Y (en) * | 2007-11-12 | 2008-11-05 | 上海市电力公司 | Amorphous alloy distribution transformer for resin insulation dry type aluminum conductor |
| CN201397737Y (en) * | 2009-03-27 | 2010-02-03 | 湖北莱克水产食品股份有限公司 | I-type coil bar stay |
| JP2010507238A (en) * | 2006-10-19 | 2010-03-04 | アーベーベー・リサーチ・リミテッド | Low voltage coil and transformer |
| CN201853564U (en) * | 2010-03-22 | 2011-06-01 | 河南天力电气设备有限公司 | Long and circular low-voltage coil of resin-cast dry type transformer |
| CN202758718U (en) * | 2012-06-11 | 2013-02-27 | 常熟市常源变压器有限公司 | Low-tension coil for dry type transformer |
-
2012
- 2012-06-11 CN CN2012101894479A patent/CN102723180A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010507238A (en) * | 2006-10-19 | 2010-03-04 | アーベーベー・リサーチ・リミテッド | Low voltage coil and transformer |
| CN201146095Y (en) * | 2007-11-12 | 2008-11-05 | 上海市电力公司 | Amorphous alloy distribution transformer for resin insulation dry type aluminum conductor |
| CN201397737Y (en) * | 2009-03-27 | 2010-02-03 | 湖北莱克水产食品股份有限公司 | I-type coil bar stay |
| CN201853564U (en) * | 2010-03-22 | 2011-06-01 | 河南天力电气设备有限公司 | Long and circular low-voltage coil of resin-cast dry type transformer |
| CN202758718U (en) * | 2012-06-11 | 2013-02-27 | 常熟市常源变压器有限公司 | Low-tension coil for dry type transformer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104217851A (en) * | 2014-09-03 | 2014-12-17 | 宁波奥克斯高科技有限公司 | End sealing method for low-voltage foil type coil of dry type transformer |
| CN105826051A (en) * | 2016-05-25 | 2016-08-03 | 常熟市常源变压器有限公司 | Foil coil for transformer |
| CN106205977A (en) * | 2016-06-24 | 2016-12-07 | 苏州华冲精密机械有限公司 | Low-voltage coil for transformator |
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Application publication date: 20121010 |