CN211957396U - Transformer winding tip magnetic leakage field shielding structure - Google Patents
Transformer winding tip magnetic leakage field shielding structure Download PDFInfo
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- CN211957396U CN211957396U CN202021030857.5U CN202021030857U CN211957396U CN 211957396 U CN211957396 U CN 211957396U CN 202021030857 U CN202021030857 U CN 202021030857U CN 211957396 U CN211957396 U CN 211957396U
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Abstract
The utility model relates to a transformer winding tip leakage magnetic field shielding structure belongs to transformer winding magnetic screen technical field. The technical scheme is as follows: contain interior winding (1), outer winding (2) and magnetic screen layer (3), the upper and lower tip of the adjacent surface of interior winding (1) and outer winding (2) all is equipped with the magnetic screen layer, and the magnetic screen layer is L shape, with the outer surface phase-match of tip about interior winding (1) and outer winding (2). The utility model has the advantages that: the magnetic shielding layer is arranged at the end part of the transformer winding, so that the magnetic leakage flux density of the end part of the transformer winding is obviously reduced, the short circuit generating force of a lead at the end part of the winding is greatly reduced, the short circuit resistance of the transformer winding can be improved, and the material cost of the transformer is reduced; the short-circuit impedance requirement value of the transformer can be reduced, and the voltage regulation rate of the transformer is reduced; and the temperature rise of the hottest point of the winding caused by the leakage flux at the end part of the winding can be reduced.
Description
Technical Field
The utility model relates to a transformer winding tip leakage magnetic field shielding structure belongs to transformer winding magnetic screen technical field.
Background
With the increasing capacity of a high-voltage alternating-current transmission system, the short-circuit current of the system is also increased, and the safe and stable operation of a power transformer is seriously threatened. In order to ensure that the winding of the power transformer has sufficient short-circuit tolerance, the common practice at present is to improve the short-circuit impedance of the winding to reduce the short-circuit current passing through the winding, thereby improving the short-circuit tolerance of the winding, but this method obviously increases the material cost of the transformer and also improves the voltage regulation rate of the transformer.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a transformer winding end portion magnetic leakage field shielding structure sets up the magnetic screen layer at transformer winding end portion, has reduced winding end portion's magnetic leakage flux density to reduce the short circuit emergence power of winding end portion wire, solved the problem that exists among the background art.
The technical scheme of the utility model is that: the utility model provides a transformer winding tip leakage magnetic field shielding structure, contains inner winding, outer winding and magnetic screen layer, and the upper and lower tip of the adjacent surface of inner winding and outer winding all is equipped with the magnetic screen layer, and the magnetic screen layer is L shape, with the outer surface phase-match of the lower tip on inner winding and the outer winding.
The magnetic shielding layer is made of a material with electric conductivity.
The number of the inner winding and the number of the outer winding are both at least one.
The method of the utility model comprises the following steps: the upper end and the lower end of the adjacent outer surface of the inner winding and the outer winding are provided with the magnetic shielding layers, the magnetic shielding layers cover the transverse magnetic leakage field concentrated positions of the upper end and the lower end of the inner winding and the outer winding, eddy currents can be generated in the magnetic leakage fields by the magnetic shielding layers, magnetic leakage flux entering the end of the inner winding and the end of the outer winding can be reduced, and therefore short circuit generating force of end wires of the inner winding and the outer winding is reduced.
The utility model has the advantages that: the magnetic shielding layer is arranged at the end part of the transformer winding, so that the magnetic leakage flux density of the end part of the transformer winding is obviously reduced, the short circuit generating force of a lead at the end part of the winding is greatly reduced, the short circuit resistance of the transformer winding can be improved, and the material cost of the transformer is reduced; the short-circuit impedance requirement value of the transformer can be reduced, and the voltage regulation rate of the transformer is reduced; and the temperature rise of the hottest point of the winding caused by the leakage flux at the end part of the winding can be reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure: inner winding 1, outer winding 2, magnetic shield layer 3.
Detailed Description
The present invention will be further described with reference to the following examples in conjunction with the accompanying drawings.
The utility model provides a transformer winding tip leakage magnetic field shielding structure, contains inner winding 1, outer winding 2 and magnetic screen layer 3, and the upper and lower tip of the adjacent surface of inner winding 1 and outer winding 2 all is equipped with the magnetic screen layer, and the magnetic screen layer is L shape, with the outer surface phase-match of tip about inner winding 1 and outer winding 2.
The magnetic shielding layer is made of a material with electric conductivity.
The number of the inner winding and the number of the outer winding are both at least one.
The method of the utility model comprises the following steps: the upper end and the lower end of the adjacent outer surface of the inner winding and the outer winding are provided with the magnetic shielding layers, the magnetic shielding layers cover the transverse magnetic leakage field concentrated positions of the upper end and the lower end of the inner winding 1 and the outer winding 2, eddy currents can be generated in the magnetic leakage fields by the magnetic shielding layers, magnetic leakage flux entering the end portions of the inner winding and the outer winding can be reduced, and therefore short circuit generating force of end wires of the inner winding and the outer winding is reduced.
The magnetic shield layer may be provided only at the upper and lower end portions of the outer surface of the inner winding adjacent to the inner winding 1 and the outer winding 2, or only at the upper and lower end portions of the outer surface of the outer winding adjacent to the inner winding 1 and the outer winding 2.
When the number of the inner windings is plural, the magnetic shield layer may be provided only at the upper and lower end portions of the adjacent outer surfaces of the inner windings and the outer windings, or may be provided at the upper and lower end portions of the adjacent outer surfaces of the inner windings and the inner windings.
In the embodiment, the number of the inner windings and the number of the outer windings are both one, the magnetic shielding layers are L-shaped, the four magnetic shielding layers are arranged at the upper end part and the lower end part of the adjacent outer surfaces of the inner winding 1 and the outer winding 2, and the number of the magnetic shielding layers is four, namely a first magnetic shielding layer, a second magnetic shielding layer, a third magnetic shielding layer and a fourth magnetic shielding layer; one end of the first magnetic shielding layer is arranged on the upper end face of the inner winding, and the other end of the first magnetic shielding layer is arranged on the side face of the inner winding; one end of the second magnetic shielding layer is arranged on the lower end face of the inner winding, and the other end of the second magnetic shielding layer is arranged on the side face of the inner winding; one end of the magnetic shielding layer III is arranged on the upper end face of the outer winding, and the other end of the magnetic shielding layer III is arranged on the side face of the outer winding; one end of the magnetic shielding layer IV is arranged on the lower end face of the outer winding, and the other end of the magnetic shielding layer IV is arranged on the side face of the outer winding.
Claims (3)
1. The utility model provides a transformer winding tip leakage magnetic field shielding structure which characterized in that: contain interior winding (1), outer winding (2) and magnetic screen layer (3), the upper and lower tip of the adjacent surface of interior winding (1) and outer winding (2) all is equipped with the magnetic screen layer, and the magnetic screen layer is L shape, with the outer surface phase-match of tip about interior winding (1) and outer winding (2).
2. The transformer winding end leakage magnetic field shielding structure according to claim 1, characterized in that: the magnetic shielding layer is made of a material with electric conductivity.
3. The transformer winding end leakage magnetic field shielding structure according to claim 1, characterized in that: the number of the inner winding and the number of the outer winding are both at least one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021030857.5U CN211957396U (en) | 2020-06-08 | 2020-06-08 | Transformer winding tip magnetic leakage field shielding structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021030857.5U CN211957396U (en) | 2020-06-08 | 2020-06-08 | Transformer winding tip magnetic leakage field shielding structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211957396U true CN211957396U (en) | 2020-11-17 |
Family
ID=73171397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021030857.5U Active CN211957396U (en) | 2020-06-08 | 2020-06-08 | Transformer winding tip magnetic leakage field shielding structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211957396U (en) |
-
2020
- 2020-06-08 CN CN202021030857.5U patent/CN211957396U/en active Active
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