Foil type pouring winding with air passages between copper bars
By setting up airways and heat dissipation bodies between the copper rows of the foil cast winding, the problem of low heat dissipation performance of the existing winding is solved, the heat dissipation efficiency and insulation performance are significantly improved, and the operation efficiency and stability of the transformer are improved.
Patent Information
- Application Number
- CN202421755398.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-07-23
AI Technical Summary
The existing foil cast winding lacks airways between the copper trays, resulting in low heat dissipation performance and high temperature rise, which affects the operating efficiency and stability of the transformer.
A foil-type casting winding with airways between copper rows is designed, and a number of airways I are set up between the first low-pressure coil and the second low-pressure coil, and a heat dissipation body is provided in the airway I to increase the heat dissipation area.
It significantly improves the heat dissipation efficiency of the winding, reduces the winding temperature, improves the operating efficiency and stability of the transformer, and at the same time enhances the insulation performance and reduces the risk of short circuit.
Smart Images
Figure CN222939740U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of foil windings, in particular to a foil casting winding with air channels between copper bars.
Background Art
[0002] The winding wound with copper foil has higher dynamic stability and short-circuit resistance than the winding wound with copper wire. Usually, the low voltage of dry-type transformers is selected to be wound with copper foil.
[0003] With the continuous growth of power demand and the continuous progress of power technology, higher requirements are also put forward for the structure of foil casting windings. The existing foil casting windings only have air channels in the arc direction, and the temperature rise is generally high. There are no air channels between copper bars, which is not conducive to heat dissipation.
Content of the Utility Model
[0004] The purpose of the utility model is to solve the problems in the prior art, and propose a foil casting winding with air channels between copper bars, which can improve the heat dissipation performance and insulation performance.
[0005] To achieve the above purpose, the utility model proposes a foil casting winding with air channels between copper bars, including a first low-voltage coil and a second low-voltage coil located inside the first low-voltage coil. The first low-voltage coil and the second low-voltage coil are arranged in a casting body. Low-voltage copper bars extending out of the casting body are provided on both the first low-voltage coil and the second low-voltage coil. A plurality of air channels I are provided between the first low-voltage coil and the second low-voltage coil of the casting body between the two low-voltage copper bars.
[0006] Preferably, a heat dissipation body is arranged in the air channel I.
[0007] Preferably, the heat dissipation body includes a pipe body and a cross body arranged inside the pipe body.
[0008] Preferably, except for the casting body between the two low-voltage copper bars, a plurality of air channels II are provided between the first low-voltage coil and the second low-voltage coil of the remaining casting body.
[0009] Preferably, a plurality of heat dissipation fins are provided on both long walls of the air channel II, and the heat dissipation fins on the two long walls are arranged staggeredly.
[0010] Advantages of the present utility model: In the present utility model, a number of air channels I are provided between the first low-voltage coil and the second low-voltage coil between two low-voltage copper bars in the casting body. In terms of heat dissipation performance, the heat dissipation area of the winding is increased, which can significantly improve the heat dissipation efficiency, reduce the winding temperature, and thus improve the operation efficiency and stability of the transformer; in terms of insulation performance, the air channel structure can reduce the direct contact between windings, reduce the short-circuit risk, and improve the insulation performance; in terms of material cost, by optimizing the air channel structure, the material consumption can be reduced on the premise of ensuring performance, and the manufacturing cost can be reduced. Compared with the prior art, it can improve the heat dissipation performance and insulation performance.
[0011] The features and advantages of the present utility model will be described in detail through embodiments in conjunction with the drawings.
Description of the Drawings
[0012] Figure 1 It is a schematic structural diagram of a foil-cast winding with an air channel between copper bars of the present utility model.
[0013] In the figure: 1 - first low-voltage coil, 2 - second low-voltage coil, 3 - low-voltage copper bar, 4 - air channel I, 5 - casting body, 6 - heat dissipation body, 7 - air channel II, 8 - heat dissipation fin, 61 - pipe body, 62 - cross body.
Specific Embodiments
[0014] Refer to Figure 1 , a foil-cast winding with an air channel between copper bars of the present utility model includes a first low-voltage coil 1 and a second low-voltage coil 2 located inside the first low-voltage coil 1. The first low-voltage coil 1 and the second low-voltage coil 2 are arranged in a casting body 5. Low-voltage copper bars 3 extending out of the casting body 5 are provided on both the first low-voltage coil 1 and the second low-voltage coil 2. A number of air channels I 4 are provided between the first low-voltage coil 1 and the second low-voltage coil 2 of the casting body 5 between the two low-voltage copper bars 3.
[0015] A heat dissipation body 6 is provided inside the air channel I 4.
[0016] The heat dissipation body 6 includes a pipe body 61 and a cross body 62 arranged inside the pipe body 61.
[0017] Except for the casting body 5 between the two low-voltage copper bars 3, a number of air channels II 7 are provided between the first low-voltage coil 1 and the second low-voltage coil 2 in the remaining casting body 5.
[0018] A number of heat dissipation fins 8 are provided on both long walls of the air channel II 7, and the heat dissipation fins 8 on the two long walls are arranged staggeredly.
[0019] The working process of the present utility model:
[0020] During the operation of a foil-type cast winding with an air duct between copper bars of the present utility model, several air ducts I4 are provided between a first low-voltage coil 1 and a second low-voltage coil 2 of a casting body 5 between two low-voltage copper bars 3. In terms of heat dissipation performance, the heat dissipation area of the winding is increased, which can significantly improve the heat dissipation efficiency, reduce the winding temperature, and thus improve the operation efficiency and stability of the transformer; in terms of insulation performance, the air duct structure can reduce the direct contact between windings, reduce the short-circuit risk, and improve the insulation performance; in terms of material cost, by optimizing the air duct structure, the material consumption can be reduced on the premise of ensuring performance, and the manufacturing cost can be lowered. Compared with the prior art, it can improve the heat dissipation performance and insulation performance.
[0021] The heat dissipation body increases the heat dissipation surface of the air duct I4, further improves the heat dissipation performance, and also improves the connection strength, making the overall strength at this place good.
[0022] The above embodiments are illustrative of the present utility model, not restrictive thereof. Any solution obtained by simply transforming the present utility model falls within the protection scope of the present utility model.
Claims
1. A foil cast winding with air ducts between copper bars, characterized in that: The invention comprises a first low-voltage coil (1) and a second low-voltage coil (2) located inside the first low-voltage coil (1); the first low-voltage coil (1) and the second low-voltage coil (2) are arranged inside a casting body (5); the first low-voltage coil (1) and the second low-voltage coil (2) are both provided with a low-voltage copper busbar (3) extending out of the casting body (5); the casting body (5) is provided with a plurality of air passages I (4) between the first low-voltage coil (1) and the second low-voltage coil (2) between the two low-voltage copper busbars (3).
2. A cast foil winding with air channels between copper bars as claimed in claim 1, characterized in that: A heat sink (6) is provided in the air passage I (4).
3. A cast foil winding with air channels between copper bars as claimed in claim 2, characterized in that: The heat sink (6) comprises a tube body (61) and a cross body (62) arranged inside the tube body (61).
4. A cast foil winding with air channels between copper bars as claimed in claim 1, characterized in that: Except for the cast body (5) between the two low-voltage copper bars (3), the remaining cast bodies (5) are provided with a plurality of air passages II (7) between the first low-voltage coil (1) and the second low-voltage coil (2).
5. A cast foil winding with air channels between copper bars as claimed in claim 4, characterized in that: A plurality of heat sinks (8) are provided on both long walls of the air channel II (7), and the heat sinks (8) on the two long walls are arranged in a staggered manner.