CN210073580U - Double-cake structure and non-uniform-distribution multi-branch parallel double-cake continuous coil - Google Patents
Double-cake structure and non-uniform-distribution multi-branch parallel double-cake continuous coil Download PDFInfo
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- CN210073580U CN210073580U CN201920803826.XU CN201920803826U CN210073580U CN 210073580 U CN210073580 U CN 210073580U CN 201920803826 U CN201920803826 U CN 201920803826U CN 210073580 U CN210073580 U CN 210073580U
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- 238000009828 non-uniform distribution Methods 0.000 title description 6
- 239000004020 conductor Substances 0.000 claims abstract description 59
- 238000004804 winding Methods 0.000 claims abstract description 8
- 235000012771 pancakes Nutrition 0.000 claims 2
- 238000013461 design Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model relates to a parallelly connected two cake continuous type coils of many branches of two cake structures and non-equipartition, this two cake structures include: the first coil cake is a first concentric cylinder formed by winding a plurality of first unit conductors in a superposition mode along the horizontal direction, and the number of the first unit conductors which is 1 time that of the first coil cake is led out in parallel; the second coil cake is a second concentric cylinder formed by winding a plurality of second unit conductors in a superposition mode along the horizontal direction, and 2 times of the second unit conductors of the second coil cake are led out in parallel; wherein the number of electrical turns of the first wire cake is 2 times that of the second wire cake, and the current-carrying section of the second wire cake is 2 times that of the first wire cake. The utility model discloses keeping under the unchangeable and single line cake size the same condition of equivalent number of turns n, will go up the tip branch road design and become 4 line cakes and establish ties, the current-carrying cross-section of head and the tail branch road doubles, makes its current density reduce to the level similar with other branch roads, has effectively improved the tip problem of generating heat.
Description
Technical Field
The utility model relates to a two cake continuous type coils especially relate to a two cake continuous type coils of parallelly connected of many branches of two cake structures and non-equipartition.
Background
A double-pancake continuous coil is usually used as a low-voltage large-current coil on a valve side on a rectifier transformer in the prior art, the coil structure is usually that N (N is more than or equal to 4) parallel branches are uniformly distributed in the height direction, each branch comprises an upper wire cake and a lower wire cake which are connected in series, the number of turns of all the wire cakes is the same, and the number and the specification of current-carrying conductors are also the same, so that all the wire cake units which are wound have the same inner diameter, outer diameter and height so as to ensure the subsequent sleeving of the coil.
In the process of implementing the present invention, the inventor finds that the prior art has at least the following problems:
in practical use of the coil structure in the prior art, because the internal magnetic field of the transformer is unevenly distributed, magnetic lines of force of the magnetic fields at the upper end and the lower end of the coil are bent towards the horizontal direction, current cannot be evenly distributed in the N parallel branches, and generally, the average value of the current flowing through the uppermost branch and the lowermost branch is about 1.5-2 times, so that the two branches generate heat higher than that of other branches, and adverse effects such as local overheating, reduction of insulation life and the like are caused.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem existing in the prior art, the embodiment of the utility model provides a two cake continuous type coils that many branches of two cake structures and non-equipartition are parallelly connected. The specific technical scheme is as follows:
in a first aspect, a dual-pie structure is provided, wherein the dual-pie structure comprises:
the first coil cake is a first concentric cylinder formed by winding a plurality of first unit conductors in a superposition mode along the horizontal direction, and the number of the first unit conductors which is 1 time that of the first coil cake is led out in parallel; and
the second coil cake is a second concentric cylinder formed by winding a plurality of second unit conductors in a superposition mode along the horizontal direction, and 2 times of the second unit conductors of the second coil cake are led out in parallel;
wherein the number of electrical turns of the first wire cake is 2 times that of the second wire cake, and the current-carrying section of the second wire cake is 2 times that of the first wire cake.
In a first possible implementation manner of the first aspect, the number of the plurality of first unit conductors is the same as the number of the plurality of second unit conductors.
In a second possible implementation manner of the first aspect, the cross-sectional specifications of the first unit conductor and the second unit conductor are the same.
In a third possible implementation manner of the first aspect, the inner diameter, the outer diameter and the height of the first concentric cylinder and the second concentric cylinder are the same.
In a second aspect, a non-uniformly distributed multi-branch parallel double-pancake continuous coil is provided, wherein the non-uniformly distributed multi-branch parallel double-pancake continuous coil comprises:
a main line vertically arranged; and
the N parallel branches are sequentially arranged in parallel along the height direction of the main line and connected with the main line, each of the N parallel branches comprises a plurality of double-cake structures in any one of the first aspects, a first parallel branch and an Nth parallel branch in the N parallel branches respectively comprise four second line cakes, the four second line cakes are arranged side by side along the height direction of the main line and are connected in series, the head ends and the tail ends of the four second line cakes after being connected in series are connected with the main line, the rest parallel branches in the N parallel branches respectively comprise two first line cakes, the two first line cakes are arranged side by side along the height direction of the main line and are connected in series, and the head ends and the tail ends of the two first line cakes after being connected in series are connected with the main line;
wherein N is a constant and is greater than or equal to 4.
In a first possible implementation manner of the second aspect, the main line further includes:
the head end circuit is vertically arranged and is connected with the head end of each parallel branch; and
and the tail end circuit is vertically arranged corresponding to the head end circuit and is connected with the tail end of each parallel branch.
In a second possible implementation manner of the second aspect, when the number of electrical turns of each parallel branch is n, each first wire cake contains n/2 electrical turns, and each second wire cake contains n/4 electrical turns; wherein n is a constant.
In a third possible implementation manner of the second aspect, when four second wire cakes are connected in series, a first second wire cake, a second wire cake, a third second wire cake, and a fourth second wire cake are sequentially arranged side by side, 2 times of second unit conductors between the first second wire cake and the second wire cake are divided into two groups, and are crossed and connected at the inner side, the second unit conductors which are 2 times of the second unit conductors between the third second line cake and the fourth second line cake are divided into two groups, and are crossed and connected at the inner side, 2 times of second unit conductors between the second wire cake and the third second wire cake are divided into two groups, and are cross-connected at the outer sides, the second unit conductors 2 times of the outer sides of the first and second wire cakes are divided into two groups, and connected to the main line, and the second unit conductors 2 times the outer side of the fourth second cake are divided into two groups and connected to the main line.
In a fourth possible implementation manner of the second aspect, when two first wire cakes are connected in series, the first wire cake is arranged side by side with the second first wire cake, 1 time of the first unit conductor between the first wire cake and the second first wire cake is connected at the inner side, 1 time of the first unit conductor at the outer side of the first wire cake is connected with the main line, and 1 time of the first unit conductor at the outer side of the second first wire cake is connected with the main line.
In a fifth possible implementation manner of the second aspect, the total number of the first wire cakes and the second wire cakes of the non-uniformly distributed multi-branch parallel double-cake continuous type coil in the height direction is 2N + 4.
Compared with the prior art, the utility model the advantage that has have:
1. the utility model discloses a parallelly connected two cake continuous type coils of many branches of non-uniform distribution, break through original inherent thinking that evenly designs into the same cake with N branch road, under the unchangeable condition the same with single cake size of wire of keeping equivalent number of turns N, design into 4 cakes of wire to establish ties with upper and lower tip branch road, the current-carrying cross-section of head and the tail branch road doubles, make its current density reduce to the level similar with other branch roads, the unit calorific capacity of all cakes of wire keeps close or unanimous promptly, under the condition of inheriting original coil advantage, the tip problem of generating heat has effectively been improved.
2. The utility model discloses a most hot point temperature of the parallelly connected two cake continuous type coils of non-uniform distribution multi-branch reduces about 5K, has effectively improved the weak point of this kind of coil, makes whole coil and to the insulation life extension of whole transformer more than original 1.7 times.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a double-cake structure according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of the wiring principle of the non-uniform multi-branch parallel double-pancake continuous coil according to the second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
In an embodiment of the present invention, please refer to fig. 1, which shows a schematic structural diagram of a dual-cake structure 1 according to an embodiment of the present invention. The double cake construction 1 comprises a first wire cake 101 and a second wire cake 102, wherein:
the first wire cake 101 is a first concentric cylinder formed by winding a plurality of first unit conductors in a superposition manner along the horizontal direction, and the number of the plurality of first unit conductors can be selected according to actual conditions. The 1-time first unit conductor of the first wire cake 101 is led out in parallel and used for the interconnection among the plurality of first wire cakes 101 and the connection with the main line 201, and the 1-time first unit conductor in the embodiment refers to the number of conductors contained in each electrical turn in the first wire cake 101.
The second wire cake 102 is a second concentric cylinder formed by winding a plurality of second unit conductors in a stacked manner along the horizontal direction, and the number of the plurality of second unit conductors can be selected according to actual situations. The 2 times second unit conductor of the second wire cake 102 is led out in parallel and used for the interconnection among a plurality of second wire cakes 102 and the connection with the main line 201, and the 2 times first unit conductor in the embodiment refers to the number of conductors contained in each electrical turn in the second wire cake 102.
The electrical turn number of the first wire cake 101 is 2 times that of the second wire cake 102, and the current-carrying cross section of the second wire cake 102 is 2 times that of the first wire cake 101.
When the second wire cake 102 is applied to the end part of the coil and the first wire cake 101 is applied to the middle part of the coil, the current-carrying section of the second wire cake 102 is 2 times of the current-carrying section of the first wire cake 101, so that the current density of the second wire cake 102 is reduced to a level close to that of the first wire cake 101, namely the unit heat productivity of all the wire cakes is kept close or consistent, and the problem of end part heat productivity can be effectively improved.
In a preferred embodiment, the number of the first unit conductors is the same as that of the second unit conductors, the section specifications of the first unit conductors are the same as those of the second unit conductors, and the inner diameters, the outer diameters and the heights of the first concentric cylinder and the second concentric cylinder are the same, so that the preparation time of raw materials can be saved, the operation and the production are convenient, the structure of the coil prepared by the concentric cylinder is the same as that of an original coil, the advantages of the original coil structure can be further kept, and the subsequent sleeving of the coil is guaranteed.
In the two embodiments of the present invention, please refer to fig. 1, which shows a schematic diagram of the wiring principle of the non-uniform multi-branch parallel connection dual-pancake continuous coil 2 according to an embodiment of the present invention. The non-uniform multi-branch parallel double-pancake continuous coil 2 comprises a main line 201 and N parallel branches 202, wherein:
referring to fig. 2 again, the main line 201 is vertically disposed, and the vertical disposition in the present embodiment means disposition along the height direction of the double-pancake continuous coil 2. The main line 201 disclosed in this embodiment further includes a head end line 21 and a tail end line 22, the head end line 21 is vertically disposed, the head end line 21 is connected to the head end of each parallel branch 202, the tail end line 22 is vertically disposed corresponding to the head end line 21, and the tail end line 22 is connected to the tail end of each parallel branch 202, but not limited thereto.
The N parallel branches 202 are sequentially arranged in parallel along the height direction of the main line 201 and connected to the main line 201, where N is a constant and is equal to or greater than 4.
The N parallel branches 202 include a plurality of double-cake structures 1 as shown in the above-mentioned embodiment, a first parallel branch 202 and an nth parallel branch 202 in the N parallel branches 202 include four second line cakes 102 respectively, the four second line cakes 102 are arranged side by side along the height direction of the main line 201 and are connected in series, and the head ends and the tail ends of the four second line cakes 102 after being connected in series are connected with the main line 201.
In a preferred embodiment, referring to fig. 2 again, the four second wire cakes 102 may be connected in series in such a manner that the first second wire cake 102, the second wire cake 102, the third second wire cake 102 and the fourth second wire cake 102 are sequentially arranged side by side, 2 times of the second unit conductors between the first second wire cake 102 and the second wire cake 102 are divided into two groups and are cross-connected at the inner side, 2 times of the second unit conductors between the third second wire cake 102 and the fourth second wire cake 102 are divided into two groups and are cross-connected at the inner side, 2 times of the second unit conductors between the second wire cake 102 and the third second wire cake 102 are divided into two groups and are cross-connected at the outer side, 2 times of the second unit conductors at the outer side of the first second wire cake 102 are divided into two groups and are connected with the main line 201, 2 times of the second unit conductors at the outer side of the fourth second wire cake 102 are divided into two groups, and is connected to the main line 201, but not limited thereto.
The remaining parallel branches 202 of the N parallel branches 202 respectively include two first line cakes 101, the two first line cakes 101 are arranged side by side along the height direction of the main line 201 and are connected in series, and the head ends and the tail ends of the two first line cakes 101 after being connected in series are connected with the main line 201.
In a preferred embodiment, referring to fig. 2 again, the two first wire cakes 101 may be connected in series in such a manner that the first wire cake 101 and the second first wire cake 101 are arranged side by side, 1 time of the first unit conductor between the first wire cake 101 and the second first wire cake 101 is connected at the inner side, 1 time of the first unit conductor at the outer side of the first wire cake 101 is connected with the main line 201, and 1 time of the first unit conductor at the outer side of the second first wire cake 101 is connected with the main line 201, but not limited thereto.
The utility model discloses a parallelly connected two cake continuous type coils of many branches of non-uniform distribution 2, break through original inherent thinking of evenly designing into the same line cake with N branch road, the tip branch road designs into 4 line cakes series connections about will, the current-carrying cross-section of head and the tail branch road (first parallelly connected branch road 202 and the parallelly connected branch road 202 of Nth) doubles, make its current density reduce to the level similar with other branch roads (all the other parallelly connected branch roads 202), the unit calorific capacity of all line cakes keeps close or unanimous promptly, under the condition of inheriting original coil advantage, the tip heating problem has effectively been improved.
In a preferred embodiment, when the number of electrical turns of each parallel branch 202 is n, n is a constant, each first wire cake 101 has n/2 electrical turns, and each second wire cake 102 has n/4 electrical turns, so as to ensure that the number of equivalent turns n of each parallel branch 202 is not changed, but is not limited thereto.
In a preferred embodiment, the total number of the first and second wire cakes 101 and 102 in the height direction of the unevenly distributed multi-branched parallel double-cake continuous coil 2 coil is 2N + 4.
The utility model discloses a many parallelly connected cake continuous type coil 2's of non-uniform distribution extreme temperature of tip coil is through the test, and it compares with prior art's two cake continuous type coil 2 and reduces about 5K, has effectively improved prior art's the weak point of coil, makes whole coil and to the insulation life extension of whole transformer more than original 1.7 times.
While the foregoing description shows and describes several preferred embodiments of the invention, it is to be understood, as noted above, that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive of other embodiments, and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed above, or as otherwise known in the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.
Claims (10)
1. A double-tortilla structure, characterized in that the double-tortilla structure comprises:
the first coil cake is a first concentric cylinder formed by winding a plurality of first unit conductors in a superposition mode along the horizontal direction, and 1 time of the first coil cake is led out in parallel; and
the second coil cake is a second concentric cylinder formed by winding a plurality of second unit conductors in a superposition mode along the horizontal direction, and 2 times of the second unit conductors of the second coil cake are led out in parallel;
wherein the number of electrical turns of the first wire cake is 2 times that of the second wire cake, and the current-carrying cross section of the second wire cake is 2 times that of the first wire cake.
2. The double-pie structure of claim 1, wherein the number of the plurality of first unit conductors is the same as the number of the plurality of second unit conductors.
3. The double-pie structure of claim 1, wherein the cross-sectional gauge of the first unit conductor is the same as the cross-sectional gauge of the second unit conductor.
4. The double-pie structure of claim 1, wherein the first concentric cylinder and the second concentric cylinder are the same in inner diameter, outer diameter, and height.
5. A non-uniform multi-branch parallel double-pancake continuous coil is characterized by comprising:
a main line vertically arranged; and
n parallel branches which are sequentially arranged in parallel along the height direction of the main line and connected with the main line, wherein the N parallel branches comprise a plurality of double-cake structures according to any one of claims 1 to 4, a first parallel branch and an nth parallel branch in the N parallel branches respectively comprise four second cakes, the four second cakes are arranged side by side along the height direction of the main line and connected in series, the head ends and the tail ends of the four second cakes connected in series are connected with the main line, the rest parallel branches in the N parallel branches respectively comprise two first cakes, the two first cakes are arranged side by side along the height direction of the main line and connected in series, and the head ends and the tail ends of the two first cakes connected in series are connected with the main line;
wherein N is a constant and is greater than or equal to 4.
6. The unequally distributed, multi-branched, parallel, double-pancake continuous coil of claim 5, wherein said main circuit further comprises:
the head end circuit is vertically arranged and is connected with the head end of each parallel branch; and
and the tail end circuit is vertically arranged corresponding to the head end circuit, and is connected with the tail end of each parallel branch.
7. The unequally distributed, multi-branched, parallel, double-pancake, continuous coil of claim 5 wherein, when said each parallel branch has n electrical turns, said each first pancake has n/2 electrical turns, and said each second pancake has n/4 electrical turns; wherein n is a constant.
8. The double-pancake continuous coil of claim 5, wherein when said four second wire cakes are connected in series, a first second wire cake, a second wire cake, a third second wire cake and a fourth second wire cake are arranged side by side in this order, 2 times the number of second unit conductors between said first second wire cake and said second wire cake are divided into two groups and are cross-connected at the inner side, 2 times the number of second unit conductors between said third second wire cake and said fourth second wire cake are divided into two groups and are cross-connected at the inner side, 2 times the number of second unit conductors between said second wire cake and said third second wire cake are divided into two groups and are cross-connected at the outer side, 2 times the number of second unit conductors at the outer side of said first second wire cake are divided into two groups and are connected to said main line, and 2 times of second unit conductors on the outer side of the fourth second line cake are divided into two groups and are connected with the main line.
9. The unequally distributed multi-branched parallel double-pancake continuous coil according to claim 5, wherein when said two first wire cakes are connected in series, a first wire cake is arranged side by side with a second first wire cake, 1 times of first unit conductors between said first wire cake and said second first wire cake are connected on an inner side, 1 times of first unit conductors on an outer side of said first wire cake are connected to said main line, and 1 times of first unit conductors on an outer side of said second first wire cake are connected to said main line.
10. The unevenly distributed, multi-branched, parallel, double-pancake continuous coil according to claim 5, wherein the total number of the first and second wire cakes in the height direction of the unevenly distributed, multi-branched, parallel, double-pancake continuous coil is 2N + 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920803826.XU CN210073580U (en) | 2019-05-30 | 2019-05-30 | Double-cake structure and non-uniform-distribution multi-branch parallel double-cake continuous coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920803826.XU CN210073580U (en) | 2019-05-30 | 2019-05-30 | Double-cake structure and non-uniform-distribution multi-branch parallel double-cake continuous coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210073580U true CN210073580U (en) | 2020-02-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920803826.XU Expired - Fee Related CN210073580U (en) | 2019-05-30 | 2019-05-30 | Double-cake structure and non-uniform-distribution multi-branch parallel double-cake continuous coil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210073580U (en) |
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2019
- 2019-05-30 CN CN201920803826.XU patent/CN210073580U/en not_active Expired - Fee Related
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