CN116825508A - Heat radiation structure of foil winding coil in dry-type transformer - Google Patents
Heat radiation structure of foil winding coil in dry-type transformer Download PDFInfo
- Publication number
- CN116825508A CN116825508A CN202310943522.4A CN202310943522A CN116825508A CN 116825508 A CN116825508 A CN 116825508A CN 202310943522 A CN202310943522 A CN 202310943522A CN 116825508 A CN116825508 A CN 116825508A
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- Prior art keywords
- coil
- coils
- foil
- dry
- radiating fin
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- 239000011888 foil Substances 0.000 title claims abstract description 35
- 238000004804 winding Methods 0.000 title claims abstract description 23
- 230000005855 radiation Effects 0.000 title claims abstract description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 abstract description 22
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Landscapes
- Coils Of Transformers For General Uses (AREA)
Abstract
The invention discloses a heat radiation structure of foil winding coils in a dry-type transformer, which comprises a plurality of turns of foil coils which are sequentially wound, wherein an insulating layer is arranged between two adjacent turns of foil coils, each turn of foil coil consists of at least two layers of branching coils which are connected in parallel, a heat conduction radiating fin is arranged between the at least two layers of adjacent branching coils, two or two end points of the radiating fin are in contact with the surfaces of the adjacent branching coils, and a plurality of heat radiation air passages which are arranged at intervals are formed between the radiating fin and the adjacent two layers of branching coils; the coil has the advantages of simple and reasonable structure, increased effective heat dissipation area of the coil, improved heat dissipation performance of the coil, capability of reducing the whole volume of the foil winding coil under the same specification and production cost of the transformer.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to a heat dissipation structure of a foil winding coil in a dry-type transformer.
Background
The transformer is a device for changing alternating voltage by utilizing the principle of electromagnetic induction, is basic equipment for power transmission and distribution, and is widely applied to the fields of industry, agriculture, traffic, urban communities and the like. The transformer loss accounts for about 40% of the power loss of the power transmission and distribution, and has great energy-saving potential. The foil winding in the dry-type transformer has low voltage, large current, high heat generation and large loss, and a heat dissipation air passage is arranged between two adjacent turns of coils for reducing temperature rise and loss.
At present, when the foil winding coil is wound, an insulated air passage rod or air passage plate is usually placed in a coil interval of two adjacent coils, epoxy resin is poured, the air passage rod or air passage plate is pulled out after pouring, so that a radiating air passage is formed, however, the epoxy resin easily flows into a gap between the two adjacent air passage rods or air passage plates during pouring, a radiating area on the surface of the coil corresponding to the part is partially covered, the effective radiating area is reduced, the radiating performance is greatly reduced, heat generated during normal operation of the transformer is not easy to be radiated through convection of air, the radiating area can be increased only by increasing the volume of the coil, the whole manufacturing cost of the transformer is increased, and the air passage rod or air passage plate is pulled out after being molded, so that the production efficiency of the transformer is reduced.
Disclosure of Invention
The invention aims to solve the technical problem of providing a heat dissipation structure of a foil winding coil in a dry-type transformer, which has a simple and reasonable structure, increases the effective heat dissipation area of the coil, improves the heat dissipation performance of the coil, can reduce the volume of the coil under the same specification, and reduces the production cost of the transformer.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides a heat radiation structure of foil winding coil in dry-type transformer, includes the foil coil that the multiturn was encircleed in proper order, is provided with the insulating layer between the adjacent two-turn foil coil, and every turn foil coil comprises at least two-layer branch coils that are connected in parallel, and is provided with the fin of heat conduction between the adjacent branch coils of at least two-layer, the terminal point on the two sides or the two sides of fin contacts with adjacent branch coil surface, be formed with the heat dissipation air flue that a plurality of intervals set up between fin and the adjacent two-layer branch coils.
Further, the cross-sectional shape of the heat sink is at least one of saw tooth shape, single wave shape, double wave shape, square wave shape, honeycomb shape, grid shape, and the like.
Further, the material of the radiating fin is copper, aluminum or copper-aluminum alloy.
Further, the radiating fin is an annular whole and covers the wire-distributing ring.
Further, the radiating fin is composed of a plurality of radiating segments which are arranged at intervals.
Further, the insulating layer is insulating paper.
Compared with the prior art, the invention has the advantages that the radiating fins with the cross section of saw-tooth shape, single wave shape, double wave shape, square wave shape, honeycomb shape or grid shape are arranged between at least two layers of branch coils in each turn of foil coil, so that the effective radiating area of the coil is greatly increased, the radiating performance of the coil is improved, the whole volume of the foil winding coil can be reduced under the same specification, the production cost of the transformer is reduced, the operation performance of the transformer is improved, the radiating fins do not need to be pulled out after the coil is poured, and the production efficiency of the transformer is improved.
Drawings
FIG. 1 is a plan view of a foil coil of the present invention after being wound (cross-sectional shape of the heat sink is saw-toothed);
FIG. 2 is an enlarged schematic view of a partial structure of the present invention (cross-sectional shape of the heat sink is saw-tooth);
FIG. 3 is a schematic diagram of a heat sink according to the present invention (the cross-sectional shape of the heat sink is square-wave);
FIG. 4 is a second schematic diagram of a heat sink according to the present invention (the cross-sectional shape of the heat sink is a single wave shape);
FIG. 5 is a third schematic diagram of a heat sink according to the present invention (the cross-sectional shape of the heat sink is double wave shape);
fig. 6 is a schematic diagram of a heat sink according to the present invention (the cross-sectional shape of the heat sink is honeycomb).
In the figure: 1. dividing coils; 2. a heat sink; 3. a heat dissipation air passage; 4. an insulating paper.
Description of the embodiments
The invention is described in further detail below with reference to the embodiments of the drawings.
As shown in fig. 1-6, a heat dissipation structure of foil winding coil in dry type transformer comprises multiple turns of foil winding coil sequentially encircling, each turn of foil winding coil is composed of at least two layers of parallel split coils 1, and heat dissipation fins 2 are arranged between at least two layers of adjacent split coils 1, the heat dissipation fins 2 can be an annular whole and cover the split coils, or the heat dissipation fins 2 can also be composed of multiple sections of heat dissipation fragments, the heat dissipation fragments are arranged around the coil axle center at intervals in an annular structure, the heat dissipation fins 2 are made of heat conduction heat dissipation materials such as copper, aluminum or copper aluminum alloy, end points on two sides of the heat dissipation fins 2 are contacted with the surfaces of the adjacent split coils 1, and a plurality of heat dissipation air passages 3 are formed at intervals, when the transformer operates, the whole coil is warmed up, due to the arrangement of the heat dissipation fins 2 and the formation of the heat dissipation air passages 3 which are axially penetrated, the heat generated on the sub-coil 1 can be conducted to the heat-conducting radiating fin 2, under the action of heat convection, hot air rises, cold air is supplemented into the radiating air passage 3 formed between the radiating fin 2 and the sub-coil 1, so that the temperature rise is reduced, the cross section of the radiating fin 2 is in a zigzag shape, a single wave shape, a double wave shape, a square wave shape, a honeycomb shape or a grid shape and the like, and a plurality of radiating air passages 3 can be formed, so that the effective radiating area is increased, for example, when the cross section of the radiating fin 2 is in a zigzag shape, the outwards protruding sawtooth end points on the radiating fin 2 are contacted with the surface of the sub-coil 1, the effective radiating area further comprises the inner and outer surface areas of the radiating fin 2 besides the original surface area of the sub-coil 1, the radiating area is greatly increased, and the radiating performance is obviously improved.
Normally, in order to avoid the turn-to-turn short circuit of the foil coil, insulation paper 4 and the like must be used for reinforcing insulation between the turns due to the potential difference between the two turns. In the invention, the heat dissipation air passage 3 is arranged between the branch coils 1 which are connected in parallel in the same turn, and no potential difference exists, so that insulating paper 4 does not need to be arranged between the branch coils 1, and the defects of local amplification, turn-to-turn short circuit and the like are avoided.
When the foil winding coil is wound, the radiating fins 2 are placed between the two adjacent layers of branch coils 1, then the radiating fins 2 and the branch coils 1 are wound into a ring shape, and the radiating fins 2 with the cross section being in the shape of saw teeth, single wave, double wave, square wave, honeycomb or grid are placed between the two layers of branch coils 1 in the turns of the foil winding coil, so that the effective radiating area of the foil winding coil is greatly increased, the radiating performance of the coil is improved, the whole volume of the foil winding coil can be reduced under the same specification, the production cost of a transformer is reduced, the operation performance of the transformer is improved, and the radiating fins 2 do not need to be pulled out after the coil is cast, so that the production efficiency of the transformer is improved.
The scope of the present invention includes, but is not limited to, the above embodiments, and any alterations, modifications, and improvements made by those skilled in the art are intended to fall within the scope of the invention.
Claims (6)
1. The utility model provides a heat radiation structure of foil winding coil in dry-type transformer, includes the foil coil that multiturn encircleed in proper order, is provided with insulating layer between two adjacent turns foil coils, its characterized in that: each turn of foil coil is composed of at least two layers of branch coils connected in parallel, heat conducting radiating fins are arranged between at least two layers of adjacent branch coils, end points on two sides or both sides of each radiating fin are in contact with the surfaces of the adjacent branch coils, and a plurality of radiating air passages arranged at intervals are formed between each radiating fin and each adjacent two layers of branch coils.
2. A heat dissipating structure for a foil winding coil in a dry-type transformer as set forth in claim 1, wherein: the cross-sectional shape of the radiating fin is at least one of saw tooth shape, single wave shape, double wave shape, square wave shape, honeycomb shape and grid shape.
3. A heat dissipating structure for a foil winding coil in a dry-type transformer as set forth in claim 1, wherein: the material of the radiating fin is copper, aluminum or copper-aluminum alloy.
4. A heat dissipating structure for a foil winding coil in a dry-type transformer as set forth in claim 1, wherein: the radiating fin is an annular whole and covers the branch coil.
5. A heat dissipating structure for a foil winding coil in a dry-type transformer as set forth in claim 1, wherein: the radiating fin is composed of a plurality of radiating segments which are arranged at intervals.
6. A heat dissipating structure for a foil winding coil in a dry-type transformer as set forth in claim 1, wherein: the insulating layer is insulating paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310943522.4A CN116825508A (en) | 2023-07-28 | 2023-07-28 | Heat radiation structure of foil winding coil in dry-type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310943522.4A CN116825508A (en) | 2023-07-28 | 2023-07-28 | Heat radiation structure of foil winding coil in dry-type transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116825508A true CN116825508A (en) | 2023-09-29 |
Family
ID=88112891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310943522.4A Pending CN116825508A (en) | 2023-07-28 | 2023-07-28 | Heat radiation structure of foil winding coil in dry-type transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116825508A (en) |
-
2023
- 2023-07-28 CN CN202310943522.4A patent/CN116825508A/en active Pending
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