CN210837425U - Foil-strip type low-voltage double-split winding transformer - Google Patents
Foil-strip type low-voltage double-split winding transformer Download PDFInfo
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- CN210837425U CN210837425U CN201921865025.2U CN201921865025U CN210837425U CN 210837425 U CN210837425 U CN 210837425U CN 201921865025 U CN201921865025 U CN 201921865025U CN 210837425 U CN210837425 U CN 210837425U
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Abstract
The utility model discloses a foil belt type low-voltage double-split winding transformer, which relates to the technical field of transformers and comprises an iron core and a winding wound on the iron core, wherein the winding comprises a low-voltage winding and a high-voltage winding, the low-voltage winding is divided into a first low-voltage winding and a second low-voltage winding, the first low-voltage winding comprises a plurality of first foil belts, one end of each first foil belt is connected to a head-end wiring row of the first low-voltage winding, and the other end of each first foil belt is connected to a tail-end wiring row of the first low-voltage winding; the second low-voltage winding comprises a plurality of second foil strips, one end of each second foil strip is connected to the first-end wiring row of the second low-voltage winding, and the other end of each second foil strip is connected to the tail-end wiring row of the second low-voltage winding; the first foil strips and the second foil strips are wound on the iron core in a staggered mode. The utility model discloses well high voltage winding need not establish to connect in parallel two sets of about and just can both be used to not have the split operating mode and also can satisfy there is the split operating mode condition.
Description
Technical Field
The utility model relates to a transformer technical field especially relates to a foil strip formula low pressure double split winding transformer.
Background
A split winding transformer refers to a multi-winding power transformer in which each phase is composed of one high-voltage winding and two or more low-voltage windings with the same voltage and capacity. The normal electric energy transmission of the split transformer is carried out between the high-voltage winding and the low-voltage winding, and the split transformer has the function of limiting short-circuit current in the case of failure.
The structure of the existing double-split transformer is that low voltage is axially split into two groups of windings which are inner windings, and the two low-voltage windings are axially arranged; the high voltage is a winding, and the external winding can be designed into an integral structure. It is only applicable to transformers with no split operation, as shown in fig. 1. When the transformer needs to meet the requirement of split operation conditions, the inner windings need to be designed to be low-voltage and split into two groups axially, the high voltage is also distributed axially, the two groups of windings correspond to the low-voltage windings in position, and the upper group and the lower group of the high voltage are connected in parallel, as shown in fig. 2.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that, overcome prior art's shortcoming, provide a foil belt formula low pressure double split winding transformer, high-voltage winding need not establish to connect in parallel about two sets of just can satisfy in not having the split operating mode also can satisfy in there is the split operating mode.
In order to solve the technical problem, the technical scheme of the utility model as follows:
a foil belt type low-voltage double-split winding transformer comprises an iron core and windings wound on the iron core, wherein the windings comprise low-voltage windings and high-voltage windings, the low-voltage windings are divided into a first low-voltage winding and a second low-voltage winding, the first low-voltage winding comprises a plurality of first foil belts which are mutually parallel along the axial direction of the iron core, one end of each first foil belt is connected to a first-end wiring row of the first low-voltage winding, and the other end of each first foil belt is connected to a tail-end wiring row of the first low-voltage winding; the second low-voltage winding comprises a plurality of second foil strips which are parallel to each other along the axial direction of the iron core, one end of each second foil strip is connected to the first-end wiring row of the second low-voltage winding, and the other end of each second foil strip is connected to the tail-end wiring row of the second low-voltage winding; the first foil strip and the second foil strip are wound on the iron core in a staggered mode along the axial direction of the iron core.
As an optimal selection scheme of foil belt formula low pressure double split winding transformer, wherein: and a gap is reserved between the adjacent first foil strips and the second foil strips.
As an optimal selection scheme of foil belt formula low pressure double split winding transformer, wherein: and an inter-segment insulating tape is arranged in a gap between the adjacent first foil tape and the second foil tape.
As an optimal selection scheme of foil belt formula low pressure double split winding transformer, wherein: and end insulating tapes are arranged at the end parts of the first foil tapes or the second foil tapes at the end parts along the axial direction of the iron core.
As an optimal selection scheme of foil belt formula low pressure double split winding transformer, wherein: the intersegment insulating tape and the end insulating tape are both made of preimpregnated DMD as insulating materials.
The utility model has the advantages that:
(1) the utility model discloses a two sets of crisscross winding establish the foil tape on the iron core as low voltage winding, make two windings evenly distributed in the axial through the mode of crisscross arranging with first low voltage winding and first low voltage winding, make every a set of reactance highly all possible highly tend to unanimity with high voltage winding reactance. Thus, the ampere-turn arrangement between the low-voltage winding and the high-voltage winding of each group is balanced. Whether the first low-voltage winding is operated independently or the first low-voltage winding and the first low-voltage winding are operated simultaneously, relatively balanced ampere turns are always kept due to small variation of reactance heights between high voltage and low voltage, so that the winding is suitable for both non-split operation and split operation;
(2) the utility model discloses set up intersegment insulating tape between adjacent first foil area and second foil area to set up the end insulating tape on the foil area of tip, guaranteed the insulating properties between two sets of low voltage winding.
(3) The foil strips can be freely combined and blended according to the prior foil strips, so that the processing period of the whole foil is shortened; and the delivery time of the finished product is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced 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 that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic winding diagram of a conventional double split transformer;
fig. 2 is a schematic diagram of another winding of a conventional double split transformer;
fig. 3 is a winding schematic diagram of a foil strip type low-voltage double-split winding transformer provided by the present invention;
fig. 4 is a schematic winding diagram of a low-voltage winding of a foil strip type low-voltage double-split winding transformer according to the present invention;
FIG. 5 is an expanded schematic view of the low voltage winding of FIG. 4;
wherein: 1. an iron core; 2. a first foil strip; 3. a second foil strip; 4. an inter-segment insulating tape; 5. and an end insulating tape.
Detailed Description
In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
The existing double-split transformer has a structure that low voltage is axially split into two groups of windings which are inner windings, high voltage is outer windings, and the double-split transformer can be designed into an integral structure. The low voltage windings are axially arranged, and the high voltage is a winding, which can only be applied to a transformer without split operation, as shown in fig. 1. When the transformer needs to meet the requirement of split operation conditions, the inner windings need to be designed to be low-voltage windings, the inner windings need to be split into two groups in the axial direction, the high voltage is also distributed in the axial direction, the two groups of windings correspond to the low-voltage windings in position, and the two groups of high voltage are connected in parallel, as shown in fig. 2, the structure is complex.
Referring to fig. 3 to 5, in view of this, the present embodiment provides a foil-type low-voltage dual-split winding transformer, which includes an iron core 1 and a winding wound on the iron core 1, where the winding includes a low-voltage winding and a high-voltage winding, the low-voltage winding is an inner winding, and the high-voltage winding is an outer winding. The low-voltage winding is divided into a first low-voltage winding and a second low-voltage winding, the first low-voltage winding and the second low-voltage winding are wound by a plurality of foil tapes,
specifically, the first low-voltage winding comprises a plurality of first foil strips 2 which are parallel to each other along the axial direction of the iron core 1, the plurality of first foil strips 2 are wound on the iron core 1 along the axial direction of the iron core 1, and a gap is reserved between the adjacent first foil strips 2. One end of all the first foil strips 2 is connected to the first end connection bank of the first low-voltage winding, i.e. the a1 connection bank, and the other end of the first foil strips 2 is connected to the last end connection bank of the first low-voltage winding, i.e. the x1 connection bank.
The second low-voltage winding comprises a plurality of second foil strips 3 which are mutually wound on the iron core 1 along the axial direction of the iron core 1, and the second foil strips 3 are all parallel to the first foil strips 2. One end of all the second foils 3 is connected to the first terminal row of the second low voltage winding, i.e. the a2 row, and the other end of the second foils 3 is connected to the last terminal row of the second low voltage winding, i.e. the x2 row. And a gap is also reserved between the adjacent second foil strips 3, so that the second foil strips 3 and the first foil strips 2 are wound on the iron core 1 in a staggered manner. The first foil belt 2 at the uppermost end is close to the upper end of the iron core 1, and the rest first foil belts 2 are all positioned in the interval between two adjacent second foil belts 3; the second foil 3 at the lowest end is close to the lower end of the iron core 1, and the rest second foil 3 are all positioned in the interval between two adjacent first foil 2.
Note that a gap is also left between the adjacent first foil strips 2 and the second foil strips 3.
It should also be noted that the width of the foil strips in each group of low-voltage windings is kept consistent, and the total height of the foil strips in the two groups of low-voltage windings is kept consistent, so that the reactance heights of the two groups of low-voltage windings are consistent, the radial directions of the windings are consistent, and the impedance of the two groups of low-voltage windings tends to be consistent.
Wherein an inter-segment insulating tape 4 is arranged in a gap between the adjacent first foil strips 2 and second foil strips 3. In addition, an end insulating tape 5 is provided at the upper end of the first foil strip 2 located at the uppermost end, and an end insulating tape 5 is also provided at the lower end of the second foil strip 3 located at the lowermost end, in the axial direction of the core 1.
Preferably, the intersegment insulating tape 4 and the end insulating tape 5 are both made of pre-impregnated DMD as the insulating material.
It should be noted that the number of the first foil strips 2 and the number of the second foil strips 3 are adjustable according to the situation, and the larger the number is, the more the corresponding leakage magnetic groups are, the smaller the leakage reactance between the two low-voltage groups is, and the smaller the splitting coefficient is.
Therefore, the utility model discloses make two windings evenly distributed in the axial through the mode of crisscross arranging with first low voltage winding and second low voltage winding, make every a set of reactance highly all possible highly tend to unanimously with high voltage winding reactance. Thus, the ampere-turn arrangement between the low-voltage winding and the high-voltage winding of each group is balanced. Whether the first low-voltage winding is operated independently or the first low-voltage winding and the first low-voltage winding are operated simultaneously, the relatively balanced ampere turns are always kept because the reactance height between high voltage and low voltage does not change greatly. So that both non-splitting and splitting operation are applicable.
In addition to the above embodiments, the present invention may have other embodiments; all the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention.
Claims (5)
1. The utility model provides a foil strip formula low pressure double split winding transformer, includes the iron core and winds and establishes winding on the iron core, the winding includes low voltage winding and high voltage winding, low voltage winding divide into first low voltage winding and second low voltage winding, its characterized in that:
the first low-voltage winding comprises a plurality of first foil strips which are parallel to each other along the axial direction of the iron core, one end of each first foil strip is connected to the first-end wiring row of the first low-voltage winding, and the other end of each first foil strip is connected to the tail-end wiring row of the first low-voltage winding;
the second low-voltage winding comprises a plurality of second foil strips which are parallel to each other along the axial direction of the iron core, one end of each second foil strip is connected to the first-end wiring row of the second low-voltage winding, and the other end of each second foil strip is connected to the tail-end wiring row of the second low-voltage winding;
the first foil strip and the second foil strip are wound on the iron core in a staggered mode along the axial direction of the iron core.
2. The foil-type low-voltage double split winding transformer according to claim 1, wherein: and a gap is reserved between the adjacent first foil strips and the second foil strips.
3. The foil-type low-voltage double split winding transformer according to claim 2, wherein: and an inter-segment insulating tape is arranged in a gap between the adjacent first foil tape and the second foil tape.
4. A foil-type low-voltage double split winding transformer according to claim 3, characterized in that: and end insulating tapes are arranged at the end parts of the first foil tapes or the second foil tapes at the end parts along the axial direction of the iron core.
5. The foil-type low-voltage double split winding transformer according to claim 4, wherein: the intersegment insulating tape and the end insulating tape are both made of preimpregnated DMD as insulating materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921865025.2U CN210837425U (en) | 2019-11-01 | 2019-11-01 | Foil-strip type low-voltage double-split winding transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921865025.2U CN210837425U (en) | 2019-11-01 | 2019-11-01 | Foil-strip type low-voltage double-split winding transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210837425U true CN210837425U (en) | 2020-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921865025.2U Active CN210837425U (en) | 2019-11-01 | 2019-11-01 | Foil-strip type low-voltage double-split winding transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210837425U (en) |
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2019
- 2019-11-01 CN CN201921865025.2U patent/CN210837425U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Foil type low voltage double split winding transformer Effective date of registration: 20210204 Granted publication date: 20200623 Pledgee: Wanshi sub branch of Jiangsu Yixing Rural Commercial Bank Co.,Ltd. Pledgor: YIXING XINGYI SPECIAL TRANSFORMER Co.,Ltd. Registration number: Y2021980000992 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |