CN210467538U - Spiral coil and power transformer with same - Google Patents
Spiral coil and power transformer with same Download PDFInfo
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- CN210467538U CN210467538U CN201921862615.XU CN201921862615U CN210467538U CN 210467538 U CN210467538 U CN 210467538U CN 201921862615 U CN201921862615 U CN 201921862615U CN 210467538 U CN210467538 U CN 210467538U
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Abstract
The utility model discloses a spiral coil and have its power transformer, spiral coil includes: the wire coil structure (1) is formed by winding N wires in parallel, the N wires are wound in a circle to form a group of wire cake groups, N wire cakes are arranged in the wire cake groups, and N is more than or equal to 2; the insulating end ring (3), the insulating end ring (3) is arranged at the end part of the wire coil structure (1); the oil gap cushion block (2) is arranged between two adjacent wire cakes in the wire cakes of the wire coil structure (1), and the oil gap cushion block (2) is not arranged between two adjacent wire cakes in the other part. The utility model provides a spiral coil has improved material utilization rate, the cost is reduced.
Description
Technical Field
The utility model relates to a power transformer makes technical field, in particular to spiral coil and have its power transformer.
Background
At present, the low-voltage winding of the power transformer adopts a spiral coil structure due to the characteristic of large current-carrying capacity. The spiral coils are divided into single spiral coils, double spiral coils and multi-spiral coils according to the axial direction and the winding direction, wherein the multi-spiral coils comprise three-spiral coils, four-spiral coils and the like.
For a large-capacity power transformer, a low-voltage coil is usually wound by a self-adhesive transposed conductor, the number of turns is small, the current is large, and the coil structure is difficult to select. The number of the single-spiral coil is too small, so that the width of a lead is large, the eddy current loss caused by transverse flux leakage at the end part is large, the loss of a product is increased, and the temperature rise of a hot point at the end part is too high. The number of the cakes of the double-helix coil is doubled, as shown in fig. 1, in the double-helix coil, two wires are wound in parallel to form a wire coil structure 1, and the wire coil structure 1 is provided with a plurality of cakes. Wherein, two wires are wound around two cake wire cakes formed by one circle and are provided with an inner oil clearance cushion block 4, and the wires are wound around two circles and are provided with an outer oil clearance cushion block 2. Through the arrangement, the oil gap cushion blocks (the outer oil gap cushion blocks 2 or the inner oil gap cushion blocks 4) are arranged between every two adjacent wire cakes of the wire coil structure 1, so that the axial length of the double-helix type coil is large, the axial bending strength of the double-helix type coil is reduced, the number of oil passages caused by the increase of the number of the wire cakes is doubled, the wire in the coil accounts for a small ratio, the economical efficiency of the coil is reduced, and the cost is high.
Therefore, how to improve the material utilization rate and reduce the cost is a problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a spiral coil to improve material utilization and reduce product cost. The utility model also provides a power transformer of having above-mentioned spiral coil.
In order to achieve the above object, the utility model provides a following technical scheme:
a helical coil, comprising:
the wire coil structure is formed by winding N wires in parallel, the N wires are wound in a circle to form a group of wire cake groups, N wire cakes are arranged in the wire cake groups, and N is more than or equal to 2;
an insulated end ring disposed at an end of the wire coil structure;
and in the multi-cake wire cakes of the wire coil structure, the oil gap cushion block is arranged between one part of two adjacent cakes and between the other part of two adjacent cakes and between the wire cakes.
Optionally, in the spiral coil, the oil clearance cushion blocks are arranged on the wire cakes at intervals of K cakes, and K is more than or equal to 2.
Optionally, in the above spiral winding, the oil gap pad is not disposed between the N-cakes in the cake group and the cakes.
Optionally, in the spiral winding, two adjacent wire cakes of the N wire cakes in the wire cake group are in contact with each other.
Optionally, in the spiral coil, the oil clearance cushion block is arranged between two adjacent coil cake groups;
two adjacent groups of the wire cake groups are formed by winding N conducting wires for two circles.
Optionally, in the spiral coil, the spiral coil is a double spiral coil, and N is 2;
and the oil clearance cushion block is arranged at the line cake at an interval of two cakes.
Optionally, in the spiral coil, two wires are wound in a circle to form a group of coil blocks;
the oil clearance cushion blocks are arranged between the two adjacent line cake groups.
Optionally, in the spiral coil, the spiral coil is a multi-spiral coil, and N is greater than or equal to 3;
and the oil clearance cushion blocks are arranged at intervals of N cakes and the line cakes.
Optionally, in the spiral coil, the insulating end ring is made of insulating paper.
The utility model also provides a power transformer, including spiral coil, spiral coil be as above-mentioned arbitrary spiral coil.
The utility model provides a spiral coil sets up insulating end circle through the tip at wire loop configuration, makes wire loop configuration's both ends all have insulating end circle then, and wire loop configuration's many cakes line cake sets up between two insulating end circles, has played effectual insulating effect to the cake. The wire coil structure is formed by winding N wires in parallel, N is more than or equal to 2, and therefore, the spiral coil is a double-spiral coil or a multi-spiral coil. The condition that the number of cakes is too few in the single spiral coil has been avoided, and then avoids the great setting of wire width, can select suitable wire width, effectively reduces the eddy current loss that the horizontal magnetic leakage of tip leads to, has reduced the coil loss, has also reduced the condition that tip hot spot temperature rises. In the multi-cake wire cakes of the wire coil structure, an oil gap cushion block is arranged between one part of two adjacent cake wires, and an oil gap cushion block is not arranged between the other part of two adjacent cake wires, so that the operation that the oil gap cushion blocks are arranged between every two adjacent cake wires is effectively avoided, the axial length of the double-spiral coil is effectively shortened, and the volume of the spiral coil is further reduced; the axial bending strength of the spiral coil is improved, the deformation space of the wire coil structure is reduced, and the structure of the wire coil structure 1 is relatively stable; the occupation ratio and the filling coefficient of the wires in the spiral coil are improved, the economy of the spiral coil is improved, and the utilization rate of wire materials is improved; the wire winding process is simple and easy to realize, the arrangement number of the oil clearance cushion blocks is reduced, and the material cost and the labor cost are effectively reduced.
The utility model also provides a power transformer, including spiral coil, spiral coil is as above-mentioned any kind of spiral coil. Since the spiral coil has the technical effects, the power transformer with the spiral coil also has the same technical effects, which are not mentioned one by one and are all within the protection range.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a spiral coil in the prior art;
fig. 2 is a schematic structural diagram of a spiral coil according to an embodiment of the present invention.
Detailed Description
The utility model discloses a spiral coil to improve material utilization rate, reduce cost. The utility model also provides a power transformer of having above-mentioned spiral coil.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 2, an embodiment of the present invention provides a spiral coil, including a wire coil structure 1, an insulating end ring 3, and an oil gap pad 2, wherein the wire coil structure 1 is formed by parallel winding of N wires, the N wires form a group of coil cake groups by parallel winding of a circle, the coil cake groups have N coil cakes, and N is greater than or equal to 2; the insulating end ring 3 is arranged at the end part of the wire coil structure 1; in the multi-cake wire cakes of the wire coil structure 1, an oil gap cushion block 2 is arranged between one part of two adjacent cake wire cakes, and an oil gap cushion block 2 is not arranged between the other part of two adjacent cake wire cakes.
The embodiment of the utility model provides a spiral coil sets up insulating end circle 3 through the tip at wire loop construction 1, makes wire loop construction 1's both ends all have insulating end circle 3 then, and wire loop construction 1's many cakes line cake sets up between two insulating end circles 3, has played effectual insulating effect to the cake. The wire coil structure 1 is formed by winding N wires in parallel, N is more than or equal to 2, and therefore, the spiral coil is a double-spiral coil or a multi-spiral coil. The condition that the number of cakes is too few in the single spiral coil has been avoided, and then avoids the great setting of wire width, can select suitable wire width, effectively reduces the eddy current loss that the horizontal magnetic leakage of tip leads to, has reduced the coil loss, has also reduced the condition that tip hot spot temperature rises. In the multi-cake wire cake of the lead coil structure 1, an oil gap cushion block 2 is arranged between two adjacent cake wire cakes of one part, and an oil gap cushion block 2 is not arranged between two adjacent cake wire cakes of the other part, so that the operation of arranging the oil gap cushion blocks between every two adjacent cake wire cakes is effectively avoided, the axial length of the double-spiral coil is effectively shortened, and the volume of the spiral coil is further reduced; the axial bending strength of the spiral coil is improved, the deformation space of the wire coil structure 1 is reduced, and the structure of the wire coil structure 1 is relatively stable; the occupation ratio and the filling coefficient of the wires in the spiral coil are improved, the economy of the spiral coil is improved, and the utilization rate of wire materials is improved; the wire winding process is simple and easy to realize, the arrangement quantity of the oil clearance cushion blocks 2 is reduced, and the material cost and the labor cost are effectively reduced.
And the N wires are wound in parallel and are wound together, and the winding direction and the winding structure are the same.
In order to improve the uniformity effect, oil gap cushion blocks 2 are arranged at intervals of K cake line cakes, and K is more than or equal to 2. Namely, oil gap cushion blocks 2 are arranged at intervals of K cake wire cakes. Namely, K cake line cakes are used as a group of line cake combinations, and an oil gap cushion block 2 is arranged between each line cake combination. Through the arrangement, the distribution uniformity of the oil gaps in the wire coil structure 1 is improved. Wherein, K may be equal to N, and K may not be equal to N.
In addition, K and N are positive integers.
For the convenience of processing, the oil clearance cushion blocks 2 are not arranged between the N cake wire cakes in the wire cake group. Namely, in the process of forming the wire coil structure 1 by winding N wires, any two wires in the N wires do not need to be separated to form the oil clearance cushion block 2, and the processing of the spiral coil is further facilitated.
Further, in the N cake wire cakes in the wire cake group, two adjacent cake wire cakes are contacted. And a gap can also exist between two adjacent cake wire cakes, the specific situation is determined according to the actual requirement, and no specific limitation is made here.
In the embodiment, an oil gap cushion block 2 is arranged between two adjacent line cake groups; two adjacent groups of the wire cake groups are formed by winding N wires for two circles. In this embodiment, N ═ K. Namely, N leads are wound in parallel to form two groups of adjacent line cake groups, namely two groups of adjacent line cake groups; in two adjacent groups of the thread cakes, the thread cake closest to the other group of the thread cake groups in one group of the thread cake groups is a first thread cake, the thread cake closest to the other group of the thread cake groups in the other group of the thread cake groups is a second thread cake, and the oil gap cushion block 2 is arranged between the first thread cake and the second thread cake. That is, the oil clearance pad 2 in this embodiment is an outward oil clearance pad. The oil gap cushion blocks 2 are not arranged between two adjacent line cake groups, and the oil gap cushion blocks 2 are only arranged at intervals of K cake lines.
In a first embodiment, the spiral coil is a double spiral coil, N ═ 2; an oil gap cushion block 2 is arranged at the interval of the two cake wire cakes. Through the arrangement, the operation is effectively facilitated on the basis of meeting the oil clearance requirement.
Furthermore, two wires are wound in a circle to form a group of wire cake groups; the oil clearance cushion block 2 is arranged between two adjacent line cake groups. That is, at two wires and form wire coil structure 1's in-process in the duplex winding, need not separate two wires and set up oil clearance cushion 2, only need two wires and set up oil clearance cushion 2 after the round and carry out the duplex winding of next round can, made things convenient for spiral coil's processing.
In the second embodiment, the spiral coil is a multi-spiral coil, N is more than or equal to 3; and oil clearance cushion blocks 2 are arranged at intervals of the N cake wire cakes. Taking a triple-spiral coil as an example, N is 3. The oil clearance cushion block 2 is arranged at the interval 3 of the cake line cake.
Preferably, three wires are wound in a circle to form a group of coil groups; the oil clearance cushion block 2 is arranged between two adjacent line cake groups. That is, at three wires and form wire coil structure 1's in-process in the duplex winding, need not separate three wires and set up oil clearance cushion 2, only need set up oil clearance cushion 2 and carry out next round of duplex winding after three wires and duplex winding round can, made things convenient for spiral coil's processing.
In this embodiment, the insulating end ring 3 is made of insulating paper. Other insulating materials, such as insulating resin or insulating rubber, can also be used to make the insulating end ring 3.
The embodiment of the utility model provides a power transformer is still provided, including spiral coil, spiral coil is as above-mentioned any kind of spiral coil. Since the spiral coil has the technical effects, the power transformer with the spiral coil also has the same technical effects, which are not mentioned one by one and are all within the protection range.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A helical coil, comprising:
the wire coil structure (1) is formed by winding N wires in parallel, the N wires are wound in a circle to form a group of wire cake groups, N wire cakes are arranged in the wire cake groups, and N is more than or equal to 2;
the insulating end ring (3), the insulating end ring (3) is arranged at the end part of the wire coil structure (1);
the oil gap cushion block (2) is arranged between two adjacent wire cakes in the wire cakes of the wire coil structure (1), and the oil gap cushion block (2) is not arranged between two adjacent wire cakes in the other part.
2. The spiral winding according to claim 1, wherein the oil gap pads (2) are arranged at intervals K patties of the wire patties, K ≧ 2.
3. The spiral winding according to claim 2, characterized in that no oil gap spacer (2) is arranged between the wire cakes of the N cakes in the set.
4. The spiral winding as claimed in claim 3, wherein N of said wire cakes in said set of wire cakes, adjacent two of said wire cakes are in contact.
5. The spiral winding according to any of claims 1-4, wherein said oil gap pads (2) are arranged between two adjacent groups of said cake groups;
two adjacent groups of the wire cake groups are formed by winding N conducting wires for two circles.
6. The spiral coil of claim 1 wherein the spiral coil is a double spiral coil, N-2;
the oil gap cushion block (2) is arranged at the interval of the two cakes and the line cake.
7. The spiral winding of claim 6 wherein two of said conductors are wound around one turn to form a set of patties;
the oil clearance cushion blocks (2) are arranged between the two adjacent line cake groups.
8. The spiral coil as claimed in claim 1, wherein the spiral coil is a multi-spiral coil, N ≧ 3;
and the oil clearance cushion blocks (2) are arranged at intervals of N cakes and the line cakes.
9. The spiral winding according to claim 1, characterized in that the insulating end turns (3) are made of insulating cardboard.
10. A power transformer comprising a spiral winding, characterized in that the spiral winding is a spiral winding according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921862615.XU CN210467538U (en) | 2019-10-31 | 2019-10-31 | Spiral coil and power transformer with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921862615.XU CN210467538U (en) | 2019-10-31 | 2019-10-31 | Spiral coil and power transformer with same |
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| Publication Number | Publication Date |
|---|---|
| CN210467538U true CN210467538U (en) | 2020-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921862615.XU Active CN210467538U (en) | 2019-10-31 | 2019-10-31 | Spiral coil and power transformer with same |
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| CN (1) | CN210467538U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115295292A (en) * | 2022-10-08 | 2022-11-04 | 通变电器有限公司 | High-stability spiral coil, coil binding method and power transformer |
-
2019
- 2019-10-31 CN CN201921862615.XU patent/CN210467538U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115295292A (en) * | 2022-10-08 | 2022-11-04 | 通变电器有限公司 | High-stability spiral coil, coil binding method and power transformer |
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