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A local overheating cooling device at the end of dry-type transformer winding

A dry-type transformer, winding end technology, applied in transformer/inductor cooling, transformer/inductor coil/winding/connection, transformer/inductor components, etc., can solve problems such as overheating of transformer winding ends, and achieve Solve the effect of easy overheating and increase heat dissipation

Active Publication Date: 2017-09-26
ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a local overheating cooling device at the end of a dry-type transformer winding, which solves the technical problem of local overheating at the end of the transformer winding

Method used

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  • A local overheating cooling device at the end of dry-type transformer winding
  • A local overheating cooling device at the end of dry-type transformer winding

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Embodiment Construction

[0010] The present invention is described in detail below in conjunction with accompanying drawing:

[0011] A dry-type transformer winding end local overheat cooling device, comprising a dry-type transformer winding core 1, an iron yoke 2 is connected to the root of the dry-type transformer winding iron core 1, and an iron yoke is connected to the root of the dry-type transformer winding iron core 1. The junction of the yoke 2 is clamped with a left semi-annular supporting plate 3 and a right semi-annular supporting plate 4. The outer circle is provided with a left semi-annular ventilator 7, the outer circle of the right semi-annular supporting plate 4 is provided with a right semi-annular ventilator 8, and the inner side of the left semi-annular ventilator 7 is provided with a left semi-annular ventilator The inner air outlet 9 is provided with the inner air outlet 10 of the right semi-annular ventilator on the inner surface of the right semi-annular ventilator 8, and the fl...

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Abstract

The invention relates to a local-overheating cooling device for an end portion of a dry type transformer winding. With the device, a technical problem of local over heating of the end portion of the transformer winding can be solved. The cooling device comprises a ventilator; and an air outlet is formed in the inner side of the ventilator. The ventilator, flat-top trapezoidal vertical type cylindrical silicon steel blocks (11) arranged at intervals along the peripheral, and inclined-top trapezoidal horizontal type cylindrical silicon steel blocks (12) arranged at intervals along the peripheral are arranged between an annular base support plate and an annular top plate. A magnetic shielding inner groove (13) is formed between the inner side surface of one flat-top trapezoidal vertical type cylindrical silicon steel blocks (11) and each two adjacent inclined-top trapezoidal horizontal type cylindrical silicon steel blocks (12); and a wedge-shaped ventilating groove (14) is formed between the top surface of one inclined-top trapezoidal horizontal type cylindrical silicon steel blocks (12) and each two adjacent flat-top trapezoidal vertical type cylindrical silicon steel blocks (11). With the local-overheating cooling device, a conflict between omnibearing overheating preventing of the three-dimensional space and inconvenient heat radiation caused by vertical type dense accumulation can be eliminated. For the air cooling channel arranged at the end portion, a problem of easy local overheating at the end portion of the winding can be solved.

Description

technical field [0001] The invention relates to a cooling device for a transformer, in particular to a cooling device for local overheating at the winding end of a dry-type transformer. Background technique [0002] During the operation of the transformer, especially when the capacity of the transformer is large, the magnetic density at the end of the winding will be larger at the corner where the iron core column and the iron yoke are connected, and there will be more leakage flux, and the leakage flux will not only pass through the winding end The eddy current loss is caused by the pull plate and clamps at the top, and the eddy current loss is also caused by the dirt accumulated near the support or corner, so it is very easy to cause local heating failure. The existing dry-type air-cooling method is to cool the transformer, especially the coil winding of the transformer, through the air-cooling system, but it has little effect on the above-mentioned local overheating pheno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/26H01F27/28H01F27/08
CPCH01F27/085H01F27/266H01F27/2876
Inventor 郝丽花张乃凡姜敏刘宏田赟杨虹郭婷白洋
Owner ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER
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