CN216597255U - Transformer coil and three-phase three-column dry-type transformer - Google Patents
Transformer coil and three-phase three-column dry-type transformer Download PDFInfo
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- CN216597255U CN216597255U CN202122989887.XU CN202122989887U CN216597255U CN 216597255 U CN216597255 U CN 216597255U CN 202122989887 U CN202122989887 U CN 202122989887U CN 216597255 U CN216597255 U CN 216597255U
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Abstract
The utility model belongs to the technical field of transformers, and discloses a transformer coil which comprises a high-voltage coil and a low-voltage coil, wherein the high-voltage coil is wound on the outer side of the low-voltage coil, the low-voltage coil comprises a plurality of coil layers, a plurality of supporting strips are longitudinally arranged between every two adjacent coil layers, an air duct is formed between every two adjacent supporting strips and every two adjacent coil layers, an insulating layer is arranged between the air duct and every two adjacent coil layers, a through heat dissipation through hole is longitudinally formed in the high-voltage coil, and an insulating cylinder is arranged between the high-voltage coil and the low-voltage coil. According to the utility model, the two end surfaces of the stay are attached to the insulating layer, so that the stability between the inner coil layer and the outer coil layer of the stay is ensured; the air duct improves the heat dissipation capacity; the through heat dissipation through holes are longitudinally formed in the high-voltage coil, so that the heat dissipation capacity in the coil is improved; and an epoxy insulating cylinder is added between the high-voltage coil and the low-voltage coil, so that the power frequency withstand voltage level of the transformer is improved.
Description
Technical Field
The utility model belongs to the technical field of transformers, and particularly relates to a transformer coil and a three-phase three-column dry-type transformer.
Background
A transformer is a device that raises or lowers voltage using faraday's law of electromagnetic induction. The transformer generally includes two or more coils, is mainly used for raising and lowering the voltage of the alternating current, changing impedance and separating circuits, is widely applied to electric power facilities, and is one of important devices indispensable in production and life.
In the prior art, the 10kV three-phase five-column amorphous alloy dry-type transformer iron core is heavy, the iron core needs to be opened at four places when a coil is assembled, the working time is long, the length size is large, the cost is high, and the occupied area is larger than that of a three-phase three-column type.
The coil is an electric loop of input and output electric energy of the transformer, is a basic component of the transformer, is also a main component for overhauling the transformer, and comprises a low-voltage coil sleeved on the iron core and a high-voltage coil arranged outside the low-voltage coil. Traditional low voltage coil structure is the one deck direct coiling in the insulating outside of iron core, and the insulating properties between low voltage coil and the iron core, between low voltage coil and the high voltage coil is not good, and the thermal diffusivity is not good, uses for a long time, will directly influence the operating quality of transformer, influences the life of transformer.
Disclosure of Invention
The utility model provides a transformer coil and a three-phase three-column dry-type transformer, which solve the problems of poor heat dissipation performance and poor insulation performance of the traditional transformer coil.
One technical scheme of the utility model is as follows: the utility model provides a transformer coil, includes high-voltage coil and low-voltage coil, the high-voltage coil coiling is in the low-voltage coil outside, low-voltage coil includes the multilayer coil layer, and is adjacent vertically be provided with many stays between the coil layer, form the wind channel between two adjacent stays and the adjacent two-layer coil layer, be equipped with the insulating layer between wind channel and the adjacent two-layer coil layer, vertically be provided with the heat dissipation through-hole that link up on the high-voltage coil, be provided with the epoxy insulating cylinder between high-voltage coil and the low-voltage coil.
Further, the horizontal section of the stay is I-shaped.
Further, the insulating layer comprises an epoxy prepreg material.
Further, the high-voltage coil is cast and coated by epoxy resin.
The other technical scheme of the utility model is as follows: a three-phase three-column dry-type transformer comprises a three-phase three-column iron core, an upper clamping piece, a lower clamping piece and a three-phase winding, wherein the three-phase winding comprises any one of three transformer coils;
the three transformer coils are respectively wound on three iron core columns of the three-phase three-column iron core, and the upper clamping piece and the lower clamping piece are respectively positioned at the upper end and the lower end of the three-phase three-column iron core and used for fixing the three-phase three-column iron core.
Furthermore, a high-voltage insulator and a low-voltage insulator are arranged on the upper clamping piece, the high-voltage insulator and the low-voltage insulator are respectively located on two sides of the three-phase three-column iron core, the high-voltage insulator is electrically connected with the high-voltage coil, and the low-voltage insulator is electrically connected with the low-voltage coil.
Furthermore, each phase of the three-phase winding is connected end to end, the head end of the first phase winding is connected with the tail end of the third phase winding, the head end of the second phase winding is connected with the tail end of the first phase winding, and the head end of the third phase winding is connected with the tail end of the second phase winding.
Further, a cooling fan is arranged on the lower clamping piece.
Further, the lower clamping piece is arranged on a base, and the base is arranged on the ground.
The utility model has the beneficial effects that: according to the utility model, the two end surfaces of the stay are attached to the insulating layer, so that the stability between the inner coil layer and the outer coil layer of the stay is ensured; the air duct improves the heat dissipation capacity; the through heat dissipation through holes are longitudinally formed in the high-voltage coil, so that the heat dissipation capacity in the coil is improved; and an epoxy insulating cylinder is added between the high-voltage coil and the low-voltage coil, so that the power frequency withstand voltage level of the transformer is improved.
Drawings
Fig. 1 is a schematic diagram of a transformer coil structure according to the present invention.
Fig. 2 is a front view of the transformer of the present invention.
Fig. 3 is a side view of the transformer of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
One embodiment of the present invention provides a transformer coil, and fig. 1 is a schematic view of a structure provided according to the transformer coil, the schematic view being a top view direction. As shown in fig. 1, the transformer coil includes a high-voltage coil 1 and a low-voltage coil 2, the high-voltage coil 1 is wound outside the low-voltage coil 2, the low-voltage coil 2 includes a plurality of coil layers 21, a plurality of stays 22 are longitudinally arranged between the adjacent coil layers 21, an air duct 24 is formed between two adjacent stays 22 and the adjacent two coil layers 21, an insulating layer 23 is arranged between the air duct 24 and the adjacent two coil layers 21, a plurality of through heat dissipation through holes 11 are longitudinally arranged on the high-voltage coil 1, an epoxy insulating cylinder 13 is arranged between the high-voltage coil 1 and the low-voltage coil 2, the coil layers 21 shown in fig. 1 are two layers, and the epoxy insulating cylinder 13 can be made of epoxy prepreg cloth. The stay is long, and is longitudinally arranged, namely the stay is parallel to the axis of the coil.
According to the utility model, the two end surfaces of the stay 22 are attached to the insulating layer 23, so that the stability between the inner coil layer 21 and the outer coil layer 21 of the stay 22 is ensured; the air duct 24 improves heat dissipation capability; the high-voltage coil 1 is longitudinally provided with the through heat dissipation through hole 11, so that the heat dissipation capacity in the coil is improved; an epoxy insulating cylinder 13 is added between the high-voltage coil 2 and the low-voltage coil 2, so that the power frequency withstand voltage level of the transformer is improved.
In one embodiment of the present invention, the stay 22 is I-shaped in horizontal cross-section. The I-shaped stay 22 not only ensures that the contact area between the stay 22 and the insulating layer 23 is large enough and the inner and outer coil layers 21 are stable, but also increases the size of the air duct 24 at both sides of the stay 22 compared with the conventional strip stay 22. Preferably, the height of the stay 22 is the same as the height of the low voltage coil 2. When the height of the two is the same, the supporting effect can be achieved to the greatest extent, and the stability is improved.
In one embodiment of the present invention, the following materials may be specifically used: the insulating layer 23 is made of epoxy resin prepreg, and the coil layer 21 is made of copper sheet. The high-voltage coil 1 is poured and coated by epoxy resin. By adopting the process and the material, the insulation can be realized to the greatest extent, and the insulation performance is improved.
In another embodiment of the present invention, a three-phase three-limb dry-type transformer is provided, which has a structure as shown in fig. 2 and 3, and comprises a three-phase three-limb iron core 3, an upper clamping piece 4, a lower clamping piece 5 and a three-phase winding, wherein the three-phase winding comprises three transformer coils of any one of the above-mentioned types. The three transformer coils are respectively wound on three iron core columns of the three-phase three-column iron core 3, and the upper clamping piece 4 and the lower clamping piece 5 are respectively positioned at the upper end and the lower end of the three-phase three-column iron core 3 and used for fixing the three-phase three-column iron core 3. The utility model discloses a through with transformer coil winding on three-phase three-column iron core 3, realize the vary voltage function, thereby adopted above-mentioned transformer coil to realize the heat dispersion of transformer simultaneously.
In one embodiment of the utility model, the upper clamping piece 4 and the lower clamping piece 5 are tightened by a spiral pull rod, so that the stability of the whole transformer is improved. The upper clamping piece 4 is provided with a high-voltage insulator 9 and a low-voltage insulator 6, the high-voltage insulator 9 and the low-voltage insulator 6 are respectively located on two sides of the three-phase three-column iron core 3, the high-voltage insulator 9 is electrically connected with the high-voltage coil 1, and the low-voltage insulator 6 is electrically connected with the low-voltage coil 2. Wherein, each phase of the three-phase winding is connected end to end. The specific connection is as follows: the head end of the first phase winding is connected with the tail end of the third phase winding, the head end of the second phase winding is connected with the tail end of the first phase winding, the head end of the third phase winding is connected with the tail end of the second phase winding, and the head and the tail of each phase are connected through a connecting rod.
In one embodiment of the present invention, to improve heat dissipation performance, the lower clip 5 is provided with a heat dissipation fan 7, which is located at the bottom of the coil. In order to improve the stability of the transformer, the lower clamp 5 is arranged on a base 8, and the base 8 is arranged on the ground.
The utility model is mainly characterized in that compared with the three-phase five-type amorphous alloy dry-type transformer, the utility model has the following advantages: 1. the weight of the three-phase three-column amorphous alloy iron core is lighter than that of a three-phase five-column amorphous alloy iron core, and the total cost is saved by about 9%. 2. The three-phase three-column type amorphous alloy iron core has less lap joint than the three-phase five-column type amorphous alloy iron core, the iron core has three lap joints, the iron core only needs to be opened when the coil is assembled, and the working time is short. 3. Compared with a three-phase five-column amorphous alloy structure, the three-phase three-column amorphous alloy structure has the advantages of small length and size and small occupied space. 4. The no-load loss is reduced by 30%, the load loss is reduced by 10%, and the total loss is reduced by 13%. The utility model adopts the three-phase three-column type iron core, does not influence the mechanical and electrical properties of the product, has low cost, short working time and small volume compared with a three-phase five-column type iron core structure, and is more suitable for adopting the amorphous alloy transformer in the urban rail transit field to reduce energy consumption at present when the energy conservation and emission reduction are increasingly emphasized.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (9)
1. The utility model provides a transformer coil, its characterized in that, includes high-voltage coil (1) and low-voltage coil (2), high-voltage coil (1) coiling is in low-voltage coil (2) outside, low-voltage coil (2) include multilayer coil layer (21), and are adjacent vertically be provided with many stays (22) between coil layer (21), form wind channel (24) between two adjacent stays (22) and adjacent two-layer coil layer (21), be equipped with insulating layer (23) between wind channel (24) and adjacent two-layer coil layer (21), vertically be provided with through-hole (11) that dispel the heat on high-voltage coil (1), be provided with epoxy insulating cylinder (13) between high-voltage coil (1) and low-voltage coil (2).
2. Transformer coil according to claim 1, characterized in that the horizontal cross section of the stays (22) is i-shaped.
3. Transformer coil according to claim 2, characterized in that the stays (22) have a height equal to the height of the low voltage coil (2).
4. The transformer coil according to claim 1, characterized in that the high voltage coil (1) is encapsulated by epoxy resin casting.
5. A three-phase three-limb dry-type transformer, comprising a three-phase three-limb core (3), an upper clamp (4), a lower clamp (5) and a three-phase winding, wherein the three-phase winding comprises three transformer coils according to any one of claims 1 to 4;
the three transformer coils are wound on three iron core columns of the three-phase three-column iron core (3) respectively, and the upper clamping piece (4) and the lower clamping piece (5) are located at the top and the bottom of the three-phase three-column iron core (3) respectively and used for fixing the three-phase three-column iron core (3).
6. A three-phase three-limb dry-type transformer according to claim 5, wherein the upper clamp (4) is provided with a high-voltage insulator (9) and a low-voltage insulator (6), the high-voltage insulator (9) and the low-voltage insulator (6) are respectively arranged at two sides of the three-phase three-limb iron core (3), the high-voltage insulator (9) is electrically connected with the high-voltage coil (1), and the low-voltage insulator (6) is electrically connected with the low-voltage coil (2).
7. A three-phase three limb dry transformer as claimed in claim 6 wherein each phase of the three-phase winding is connected end to end, the first phase winding head end is connected to the third phase winding tail end, the second phase winding head end is connected to the first phase winding tail end and the third phase winding head end is connected to the second phase winding tail end.
8. A three-phase three-limb dry transformer according to claim 5, wherein the lower clamp (5) is provided with a heat dissipation fan (7).
9. A three-phase three limb dry transformer according to claim 5, wherein the lower clamp (5) is arranged on a base (8), the base (8) being arranged on the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122989887.XU CN216597255U (en) | 2021-12-01 | 2021-12-01 | Transformer coil and three-phase three-column dry-type transformer |
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| CN202122989887.XU CN216597255U (en) | 2021-12-01 | 2021-12-01 | Transformer coil and three-phase three-column dry-type transformer |
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| CN216597255U true CN216597255U (en) | 2022-05-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115472390A (en) * | 2022-09-14 | 2022-12-13 | 四川众信通用电力有限公司 | High heat dissipating transformer |
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2021
- 2021-12-01 CN CN202122989887.XU patent/CN216597255U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115472390A (en) * | 2022-09-14 | 2022-12-13 | 四川众信通用电力有限公司 | High heat dissipating transformer |
| CN115472390B (en) * | 2022-09-14 | 2023-05-12 | 四川众信通用电力有限公司 | High heat dissipation transformer |
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