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Air-cooled dry-type transformer

A dry-type transformer, transformer technology, applied in the direction of transformer/inductor cooling, transformer/inductor components, transformer/inductor coil/winding/connection, etc. The problems such as the large difference between the entering and cooling wind speeds can avoid the high temperature of the hot spot, reduce the temperature rise of the hot spot, and reduce the volume and weight.

Pending Publication Date: 2021-12-21
襄阳中车电机技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the air-cooled transformer, the direction of the airflow is parallel to the iron core column, so that the airflow can enter the inside of the coil, but in the part covered by the iron yoke, due to the large internal wind resistance, it is difficult for the cooling air to enter, so that the cooling wind speed varies greatly between the windings, especially The phase-to-phase position of the transformer has poor heat dissipation, resulting in excessively high temperature of the hot spot at the end of the winding on the air outlet side, while the temperature margin in other places is too large, which affects the economy and reliability of the product

Method used

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  • Air-cooled dry-type transformer
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  • Air-cooled dry-type transformer

Examples

Experimental program
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Embodiment 1

[0029] Such as Figure 1 to Figure 5 As shown, the air-cooled dry-type transformer of this embodiment includes an upper iron yoke 1, a lower iron yoke 2, and an iron core 3. The iron core 3 includes an iron core column and a coil 31. A coil heat dissipation air passage 4 is provided in the transformer, and the coil heat dissipation air passage 4 runs through the upper iron yoke 1, the coil 31 and the lower iron yoke 2 in turn, the air passage inlet 41 of the coil cooling air passage 4 is set on the upper iron yoke 1, and the air passage outlet 42 is arranged on the lower iron yoke 2. In actual use, the transformer will be installed in a cooling air duct 5, and the upper iron yoke 1 faces the wind direction in the cooling air duct 5, that is, the transformer is installed by turning it over 90° (from vertical to horizontal), and the outer circumference of the iron core 3 A windshield 6 that can block the cooling air duct 5 is provided.

[0030] The cooling air in the cooling ai...

Embodiment 2

[0036] Such as Figure 6 and Figure 7 As shown, the air-cooled dry-type transformer of this embodiment differs from Embodiment 1 only in that:

[0037] In this embodiment, two sets of coil heat dissipation air passages 4 are provided, and each group is provided with two coil heat dissipation air passages 4. Along the wind direction in the cooling air passage 5, two sets of coil heat dissipation air passages 4 are arranged in parallel up and down, a total of 4 coils The heat dissipation air passage 4, the air passage entrance 41 of each coil heat dissipation air passage 4 is distributed as follows Figure 6 shown.

[0038] In this embodiment, air deflectors 7 are provided on both sides of the air passage inlet 41 of each group of coil heat dissipation air passages 4, and three air deflectors 7 are provided on the two sets of coil heat dissipation air passages 4, as shown in Figure 7 shown.

[0039] In this embodiment, the sum of the lengths of the air passage inlets 41 of...

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Abstract

The invention discloses an air-cooled dry-type transformer which comprises an upper iron yoke, a lower iron yoke and an iron core; the iron core comprises an iron core column and a coil; a coil heat dissipation air channel is formed in the transformer and sequentially penetrates through the upper iron yoke, the coil and the lower iron yoke; an air channel inlet of the coil heat dissipation air channel is formed in the upper iron yoke, and an air channel outlet is formed in the lower iron yoke; the transformer is located in a cooling air channel; the upper iron yoke faces the air direction in the cooling air channel; and an air baffle capable of separating the cooling air channel is arranged on the periphery of the iron core. The air-cooled dry-type transformer has the advantages that cooling air can enter the iron core coil from the seal on the iron yoke to cool the interior of the coil, the heat dissipation condition of dead corners in the transformer winding is improved, and the winding is prevented from being too high in hot-spot temperature at the end part of the air outlet side.

Description

technical field [0001] The invention relates to electrical equipment, in particular to an air-cooled dry-type transformer. Background technique [0002] In the air-cooled transformer, the direction of the airflow is parallel to the iron core column, so that the airflow can enter the inside of the coil, but in the part covered by the iron yoke, due to the large internal wind resistance, it is difficult for the cooling air to enter, so that the cooling wind speeds of the windings vary greatly, especially The phase-to-phase position of the transformer has poor heat dissipation, which causes the temperature of the hot spot at the end of the winding on the air outlet side to be too high, while the temperature margin in other places is too large, which affects the economy and reliability of the product. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, provide a cooling air that can en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/08H01F27/28
CPCH01F27/085H01F27/2876
Inventor 李艳平刘长青敬华兵陈立向坤成林黄江瑞梁涛曾明成张志鹏
Owner 襄阳中车电机技术有限公司