CN217214414U - Novel foil coil lead-out wire structure of heavy-current transformer - Google Patents
Novel foil coil lead-out wire structure of heavy-current transformer Download PDFInfo
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- CN217214414U CN217214414U CN202221259023.0U CN202221259023U CN217214414U CN 217214414 U CN217214414 U CN 217214414U CN 202221259023 U CN202221259023 U CN 202221259023U CN 217214414 U CN217214414 U CN 217214414U
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Abstract
The utility model discloses a novel foil coil outgoing line structure of a heavy current transformer, which comprises an iron core, a clamping piece, a low-voltage coil and a high-voltage coil, wherein the low-voltage coil and the high-voltage coil are sleeved on the iron core; the low-voltage coil is formed by winding two copper foils in an overlapping manner, the two copper foils are separated by insulation, and the starting ends of the two copper foils are respectively arranged on two sides of the low-voltage coil; two low-voltage coil inner connecting plates are arranged on the inner side of the low-voltage coil and are respectively connected with the starting ends of the two copper foils; two low-voltage coil outer connecting plates are arranged on the outer sides of the low-voltage coils and are respectively connected with the tail ends of the two copper foils; the low-voltage coil inner connecting plate is upwards led out to the upper end of the low-voltage coil, and the low-voltage coil outer connecting plate is downwards led out to the lower end of the low-voltage coil. In the lead-out wire structure, the low-voltage coil is formed by winding two copper foils in an overlapping mode, so that the cross sections of the inner connecting plate and the outer connecting plate are reduced to half of those of a conventional product, the loss caused by a skin effect is reduced, the lead structure space of a transformer body is enlarged, and the lead operation is simple.
Description
Technical Field
The utility model relates to a transformer technical field, concretely relates to novel heavy current transformer foil formula coil outgoing line structure.
Background
The transformer is a conversion device for changing alternating voltage by utilizing the principle of electromagnetic induction, is a core component of a power transformation part of a power system, and mainly comprises an iron core, and a low-voltage coil and a high-voltage coil which are wound on the iron core. The high-voltage coil and the low-voltage coil can be generally divided into a wire-wound coil and a foil coil according to different conductor structures. The foil coil is formed by taking copper or aluminum foil strips with different thicknesses as conductors, wide-strip-shaped insulating materials as interlayer insulation and narrow-strip-shaped insulating materials as end insulation, and completing winding on a foil winding machine at one time.
At present, with the acceleration of urbanization process, the electricity consumption in production and daily life is continuously increased, and the market share of products of high-capacity and high-current transformers is more and more. However, when the transformer has a large capacity and a large current, the thickness and width of the foil need to be increased, so that the consumption of materials is increased, and the product cost is increased; under the condition of large current, the leakage magnetic field of the transformer is stronger, and the skin effect generated by the foil and the lead bar is larger, so that the eddy current loss of the transformer is large, the problem of local overheating caused by the eddy current loss is more prominent, the temperature rise of the transformer is difficult to control, and the performance of the transformer is greatly influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a novel heavy current transformer foil coil lead-out wire structure for overcome the above-mentioned problem that exists among the prior art. In the novel foil coil leading-out wire structure of the heavy current transformer, the low-voltage coil is formed by overlapping two copper foils, so that the cross sections of the inner connecting plate and the outer connecting plate are reduced to a half of that of a conventional product, the loss caused by the skin effect can be reduced, and the running reliability of the transformer is improved; and the low-voltage coil is split into the mode similar to the double low-voltage coils, so that the lead structure space of the transformer body can be enlarged, the lead operation is simple, and meanwhile, a room is provided for compressing the space of the oil tank.
The technical scheme of the utility model: the novel foil coil outgoing line structure of the high-current transformer comprises an iron core, a clamping piece for supporting the iron core, a low-voltage coil and a high-voltage coil, wherein the low-voltage coil and the high-voltage coil are sleeved on the iron core, and the high-voltage coil is sleeved on the outer side of the low-voltage coil; the low-voltage coil is formed by two copper foils in a lap winding mode, and the two copper foils are separated through insulation; the starting ends of the two copper foils are respectively arranged at two sides of the low-voltage coil; two low-voltage coil inner connecting plates are arranged on the inner side of the low-voltage coil and are respectively connected with the starting ends of the two copper foils; two low-voltage coil outer connecting plates are arranged on the outer sides of the low-voltage coils and are respectively connected with the tail ends of the two copper foils; the low-voltage coil inner connecting plate is led out upwards to the upper end of the low-voltage coil, and the low-voltage coil outer connecting plate is led out downwards to the lower end of the low-voltage coil.
Compared with the prior art, in the novel high-current transformer foil coil leading-out wire structure, the low-voltage coil is formed by winding two copper foils in an overlapping manner, so that the eddy current loss caused by the increase of the thickness of the copper foils can be reduced, the running reliability of the transformer is improved, and the cross sections of the inner connecting plate and the outer connecting plate are reduced to half of that of a conventional product, so that the loss caused by the skin effect can be reduced, the manufacturing consumable material is saved, the production cost is reduced, and the economic benefit is obvious; in addition, with the mode of low voltage coil split into similar two low voltage coil, can increase ware body lead wire structure space for the lead wire operation is simpler, provides the leeway for compressing the oil tank space simultaneously.
Preferably, in the foil coil lead-out structure of the novel high-current transformer, the low-voltage coil inner connecting plate includes a first connecting portion, a first lead-out portion and a first bending portion, and the first connecting portion is welded to the inner side of the low-voltage coil; the low-voltage coil outer connecting plate comprises a second connecting part, a second leading-out part and a second bending part, and the second connecting part is welded on the outer side of the low-voltage coil. The bending parts are designed on the inner connecting plate and the outer connecting plate, so that the function of avoiding barriers can be achieved, and the inner connecting plate and the outer connecting plate can be conveniently assembled; and the inner and outer connecting plates are connected with the low-voltage coil by welding, so that the processing is easy, the production efficiency is high, and the production cost is low.
Furthermore, the low-voltage coil inner connecting plate and the low-voltage coil outer connecting plate are formed by bending strip-shaped copper bars. The inner connecting plate and the outer connecting plate are integrally formed, so that the structure is simple, the manufacture is convenient, and the cost control is facilitated; the inner connecting plate and the outer connecting plate are made of copper bars, so that the cross section can be made larger, the heat dissipation performance is good, and the service life is long; in addition, the row face of the copper bar is bright, and no crack exists during bending, so that the appearance of the processed inner and outer connecting plates is good.
Further, first connecting portion and second connecting portion all are the arc. Therefore, the first connecting portion and the second connecting portion can be attached to the inner side and the outer side of the low-voltage coil in a bent mode, the first connecting portion and the second connecting portion cannot exceed the arc of the low-voltage coil after the low-voltage coil is wound, and the attractiveness of the processed low-voltage coil is high.
Further, the first connecting part and the first leading-out part are arranged in parallel; the second connecting part and the second leading-out part are arranged in parallel. Therefore, the space in the transformer can be fully utilized during lead-in, so that the whole volume of the transformer can be reduced to a certain extent, and the manufacturing cost is reduced.
Further, the length of the first connecting portion and the second connecting portion is greater than the height of the low-voltage coil. From this for first connecting portion and second connecting portion can stretch into the bottom of low voltage coil from top to bottom, have increased the area of contact of hitch plate with low voltage coil, and the resistance is littleer relatively this moment, thereby has promoted the conductibility, has reduced the loss.
In the novel foil coil lead-out structure of the high-current transformer, the first lead-out parts of the two low-voltage coil inner connecting plates are connected together through a head connecting wire; the second leading-out parts of the two low-voltage coil outer connecting plates are respectively fixed on the tail connecting wire.
Preferably, in the foil coil outgoing line structure of the novel high-current transformer, the two ends of the low-voltage coil and the two ends of the high-voltage coil are both provided with insulating tapes. Thus, the insulation performance of the low-voltage coil and the high-voltage coil is ensured.
Drawings
Fig. 1 is a schematic diagram of a foil coil lead-out structure of a novel high-current transformer in an embodiment of the present application;
FIG. 2 is a top view of a low voltage coil in an embodiment of the present application;
FIG. 3 is a schematic view of a tie plate within a low voltage coil in an embodiment of the present application;
fig. 4 is a schematic view of the low voltage coil outer tie plate in an embodiment of the present application.
The symbols in the drawings are: 1-an iron core; 2-a clamp; 3-low-voltage coil, 301-copper foil, 3011-first copper foil, 3012-second copper foil, 302-low-voltage coil inner connecting plate, 3021-first connecting part, 3022-first leading-out part, 3023-first bending part, 303-low-voltage coil outer connecting plate, 3031-second connecting part, 3032-second leading-out part, 3033-second bending part; 4-a high voltage coil; 5-a head tie line; 6-tail bond line; 7-insulating tape.
Detailed Description
The following further describes the present application with reference to the drawings and examples, but the present application is not limited thereto.
Referring to fig. 1 and 2, the novel foil coil outgoing line structure of the large-current transformer comprises an iron core 1, a clamping piece 2 for supporting the iron core 1, a low-voltage coil 3 and a high-voltage coil 4, wherein the low-voltage coil 3 and the high-voltage coil 4 are both sleeved on the iron core 1, and the high-voltage coil 4 is sleeved on the outer side of the low-voltage coil 3; the low-voltage coil 3 is formed by two copper foils 301 in an overlapping mode (turn-to-turn capacitors of the low-voltage coil 3 wound by the copper foils are uniformly distributed along the coil, the potential gradient is small, and the anti-impact voltage capability is strong), and the two copper foils 301 are separated through insulation; the starting ends of the two copper foils 301 are respectively arranged at two sides of the low-voltage coil 3 (as shown in fig. 2, the starting end and the tail end of the first copper foil 3011 are distributed at one side of the low-voltage coil 3, and the starting end and the tail end of the second copper foil 3012 are distributed at the other side of the low-voltage coil 3); two low-voltage coil inner connecting plates 301 are arranged on the inner side of the low-voltage coil 3 and are respectively connected with the starting ends of the two copper foils 301; two low-voltage coil outer connecting plates 302 are arranged on the outer side of the low-voltage coil 3 and are respectively connected with the tail ends of two copper foils 301; the low-voltage coil inner connecting plate 301 is led out upward to the upper end of the low-voltage coil 3, and the low-voltage coil outer connecting plate 302 is led out downward to the lower end of the low-voltage coil 3.
Example (b):
referring to fig. 3 and 4, in the present embodiment, the low-voltage coil inner connection plate 302 includes a first connection portion 3021, a first lead-out portion 3022, and a first bent portion 3023, and the first connection portion 3021 is welded to the inner side of the low-voltage coil 3 (the first connection portions 3021 of the two low-voltage coil inner connection plates 302 are welded to the starting ends of the two copper foils 301, respectively); the low-voltage coil outer coupling plate 303 includes a second connection portion 3031, a second lead portion 3032, and a second bent portion 3033, and the second connection portion 3031 is welded to the outer side of the low-voltage coil 3 (the second connection portions 3031 of the two low-voltage coil outer coupling plates 303 are welded to the ends of the two copper foils 301, respectively). The bending parts are designed on the inner connecting plate and the outer connecting plate, so that the function of avoiding barriers can be achieved, and the inner connecting plate and the outer connecting plate can be conveniently assembled; and the inner and outer connecting plates are connected with the low-voltage coil 3 by welding, so that the processing is easy, the production efficiency is high, and the production cost is low.
Further, the low-voltage coil inner connecting plate 302 and the low-voltage coil outer connecting plate 303 are formed by bending strip-shaped copper bars. The inner connecting plate and the outer connecting plate are integrally formed, so that the structure is simple, the manufacture is convenient, and the cost control is facilitated; the inner connecting plate and the outer connecting plate are made of copper bars, so that the cross section can be made larger, the heat dissipation performance is good, and the service life is long; in addition, the row face of the copper bar is bright, and no crack exists during bending, so that the processed inner and outer connecting plates are good in appearance.
Further, the first connection portion 3021 and the second connection portion 3031 are each arc-shaped. Therefore, the first connecting part 3021 and the second connecting part 3031 can be attached to the inner side and the outer side of the low-voltage coil 3, after the low-voltage coil 3 is wound, the first connecting part 3021 and the second connecting part 3031 cannot exceed the arc of the low-voltage coil 3, and the processed low-voltage coil 3 is high in appearance.
Further, the first connection portion 3021 and the first lead portion 3022 are arranged in parallel; the second connection portion 3031 and the second lead portion 3032 are arranged in parallel. Therefore, the space in the transformer can be fully utilized during lead-in, so that the whole volume of the transformer can be reduced to a certain extent, and the manufacturing cost is reduced.
Further, the lengths of the first and second connection parts 3021 and 3031 are greater than the height of the low-voltage coil 3. Therefore, the first connecting part 3021 and the second connecting part 3031 can extend into the bottom end of the low-voltage coil 3 from top to bottom, the contact area between the connecting plate and the low-voltage coil 3 is increased, the resistance is relatively smaller at the moment, the conductivity is improved, and the loss is reduced.
In the present embodiment, the first lead-out portions 3022 of the two low-voltage coil inner tie plates 302 are connected together by the head tie wire 5; the second lead portions 3032 of the two low-voltage coil outer joint plates 303 are fixed to the tail joint wires 6, respectively. Therefore, the two low-voltage coil inner connecting plates 302 can be led to the sleeve through the head connecting wires 5, and the low-voltage coil outer connecting plates 303 on the same side of the three-phase low-voltage coil 3 are directly connected together through the tail connecting wires 6 without being led out separately, so that the lead-out operation is further simplified.
In this embodiment, the two ends of the low-voltage coil 3 and the high-voltage coil 4 are both provided with insulating tapes 7. Thus, the insulation performance of the low-voltage coil 3 and the high-voltage coil 4 is ensured. The insulating tape 7 may be made of a glass fiber product such as a glass fiber tape.
The above general description of the invention and the description of its specific embodiments in this application should not be construed as limiting the scope of the invention. Those skilled in the art can add, reduce or combine the technical features disclosed in the general description and/or the specific embodiments (including the examples) to form other technical solutions within the scope of the present application according to the disclosure of the present application without departing from the components of the present invention.
Claims (8)
1. The novel foil coil outgoing line structure of the high-current transformer comprises an iron core (1), a clamping piece (2) used for supporting the iron core (1), a low-voltage coil (3) and a high-voltage coil (4), wherein the low-voltage coil (3) and the high-voltage coil (4) are both sleeved on the iron core (1), and the high-voltage coil (4) is sleeved on the outer side of the low-voltage coil (3); the method is characterized in that: the low-voltage coil (3) is formed by winding two copper foils (301) in an overlapping mode, and the two copper foils (301) are separated through insulation; the starting ends of the two copper foils (301) are respectively arranged at two sides of the low-voltage coil (3); two low-voltage coil inner connecting plates (302) are arranged on the inner side of the low-voltage coil (3) and are respectively connected with the starting ends of the two copper foils (301); two low-voltage coil outer connecting plates (303) are arranged on the outer side of the low-voltage coil (3) and are respectively connected with the tail ends of the two copper foils (301); the low-voltage coil inner connecting plate (302) is led out upwards to the upper end of the low-voltage coil (3), and the low-voltage coil outer connecting plate (303) is led out downwards to the lower end of the low-voltage coil (3).
2. The novel high-current transformer foil coil outgoing line structure as claimed in claim 1, wherein: the low-voltage coil inner connecting plate (302) comprises a first connecting part (3021), a first leading-out part (3022) and a first bending part (3023), wherein the first connecting part (3021) is welded on the inner side of the low-voltage coil (3); the low-voltage coil outer coupling plate (303) comprises a second connecting part (3031), a second leading-out part (3032) and a second bending part (3033), wherein the second connecting part (3031) is welded on the outer side of the low-voltage coil (3).
3. The novel high-current transformer foil coil outgoing line structure as claimed in claim 2, wherein: the low-voltage coil inner connecting plate (302) and the low-voltage coil outer connecting plate (303) are formed by bending strip-shaped copper bars.
4. The novel high-current transformer foil coil outgoing line structure as claimed in claim 3, wherein: the first connecting portion (3021) and the second connecting portion (3031) are both arc-shaped.
5. The novel high-current transformer foil coil outgoing line structure as claimed in claim 4, wherein: the first connection part (3021) and the first lead-out part (3022) are arranged in parallel; the second connecting part (3031) and the second leading-out part (3032) are arranged in parallel.
6. The novel high-current transformer foil coil outgoing line structure as claimed in claim 5, wherein: the length of the first connecting part (3021) and the second connecting part (3031) is greater than the height of the low-voltage coil (3).
7. The novel high-current transformer foil coil outgoing line structure as claimed in claim 2, wherein: the first leading-out parts (3022) of the two low-voltage coil inner connecting plates (302) are connected together through a head connecting wire (5); the second lead-out portions (3032) of the two low-voltage coil outer connecting plates (303) are fixed to the tail connecting wires (6) respectively.
8. The novel high-current transformer foil coil outgoing line structure as claimed in claim 1, wherein: and both ends of the low-voltage coil (3) and the high-voltage coil (4) are provided with insulating tapes (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221259023.0U CN217214414U (en) | 2022-05-19 | 2022-05-19 | Novel foil coil lead-out wire structure of heavy-current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221259023.0U CN217214414U (en) | 2022-05-19 | 2022-05-19 | Novel foil coil lead-out wire structure of heavy-current transformer |
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| Publication Number | Publication Date |
|---|---|
| CN217214414U true CN217214414U (en) | 2022-08-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221259023.0U Active CN217214414U (en) | 2022-05-19 | 2022-05-19 | Novel foil coil lead-out wire structure of heavy-current transformer |
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| CN (1) | CN217214414U (en) |
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- 2022-05-19 CN CN202221259023.0U patent/CN217214414U/en active Active
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