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Epoxy resin insulating transformer

A technology for insulating transformers and epoxy resins, applied in plastic/resin/wax insulators, organic insulators, transformer/inductor coils/windings/connections, etc., can solve the problem of poor thermal conductivity of epoxy resins and affect the reliability of transformers , poor impact damage resistance, etc., to achieve the effect of increasing heat dissipation, low loss, and increasing adhesion

Inactive Publication Date: 2013-03-20
JIANGSU YAWEI TRANSFORMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: First, due to the difference between the expansion coefficient of the epoxy resin itself and the expansion coefficient of the coil copper conductor, when the temperature rises, a large internal stress will be generated between the two, which will easily cause the epoxy The cracking and deformation of the resin affect the reliability of the transformer; second, the epoxy resin is brittle, has poor impact damage resistance, and relatively poor heat resistance, generally less than 170°C, and when the transformer is overloaded, the heat generated The thermal conductivity of the epoxy resin itself is not good. Therefore, the heat dissipation effect of the existing epoxy resin cast dry-type transformer is relatively poor, which limits the ability of the transformer to operate under overload.

Method used

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  • Epoxy resin insulating transformer

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Effect test

Embodiment 1

[0017] Such as figure 1 As shown, an epoxy resin insulated transformer according to the present invention includes a high-voltage coil 1 and a low-voltage coil 2 coaxially arranged, the high-voltage coil 1 is arranged outside the low-voltage coil 2, and the high-voltage coil 1 and the A poured epoxy resin insulating layer 3 is provided between the low-voltage coils 2, and the composition and ratio of the epoxy resin insulating layer 3 are:

[0018] 40 parts by weight of epoxy resin;

[0019] 20 parts by weight of curing agent;

[0020] Toughener 10 parts by weight;

[0021] The rest are fillers.

[0022] The filler includes quartz powder, aluminum oxide, aluminum powder, talcum powder, corundum and mica powder.

[0023] The curing agent is a methyl tetrahydrophthalic anhydride curing agent or a methyl hexahydrophthalic anhydride curing agent.

[0024] The toughening agent is asbestos fiber or glass fiber.

[0025] The epoxy resin insulating layer 3 is provided with an an...

Embodiment 2

[0027] Such as figure 1 As shown, an epoxy resin insulated transformer according to the present invention includes a high-voltage coil 1 and a low-voltage coil 2 coaxially arranged, the high-voltage coil 1 is arranged outside the low-voltage coil 2, and the high-voltage coil 1 and the A poured epoxy resin insulating layer 3 is provided between the low-voltage coils 2, and the composition and ratio of the epoxy resin insulating layer 3 are:

[0028] 50 parts by weight of epoxy resin;

[0029] 10 parts by weight of curing agent;

[0030] Toughener 5 parts by weight;

[0031] The rest are fillers.

[0032] The filler includes quartz powder, aluminum oxide, aluminum powder, talcum powder, corundum and mica powder.

[0033] The curing agent is a methyl tetrahydrophthalic anhydride curing agent or a methyl hexahydrophthalic anhydride curing agent.

[0034] The toughening agent is asbestos fiber or glass fiber.

[0035] The epoxy resin insulating layer 3 is provided with an ann...

Embodiment 3

[0037] Such as figure 1 As shown, an epoxy resin insulated transformer according to the present invention includes a high-voltage coil 1 and a low-voltage coil 2 coaxially arranged, the high-voltage coil 1 is arranged outside the low-voltage coil 2, and the high-voltage coil 1 and the A poured epoxy resin insulating layer 3 is provided between the low-voltage coils 2, and the composition and ratio of the epoxy resin insulating layer 3 are:

[0038] 30 parts by weight of epoxy resin;

[0039] 18 parts by weight of curing agent;

[0040] Toughener 9 parts by weight;

[0041] The rest are fillers.

[0042] The filler includes quartz powder, aluminum oxide, aluminum powder, talcum powder, corundum and mica powder.

[0043] The curing agent is a methyl tetrahydrophthalic anhydride curing agent or a methyl hexahydrophthalic anhydride curing agent.

[0044] The toughening agent is asbestos fiber or glass fiber.

[0045] The epoxy resin insulating layer 3 is provided with an ann...

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PUM

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Abstract

The invention relates to the technical field of electric equipment transformers, in particular to an epoxy resin insulating transformer, which comprises a high-voltage coil and a low-voltage coil arranged coaxially, wherein the high-voltage coil is arranged on the outer side of the low-voltage coil; an epoxy resin insulating layer formed by pouring is formed between the high-voltage coil and the low-voltage coil; and the epoxy resin insulating layer comprises epoxy resin, a filling agent, a curing agent and a toughening agent. Due to the adoption of the formula, the epoxy resin insulating transformer has high heat resistance and high toughness during running, and can run under overload for a long time. Meanwhile, an annular radiating channel is formed in the epoxy resin insulating layer, so that the radiating effect is enhanced, and safety and reliability are realized.

Description

technical field [0001] The invention relates to the technical field of power equipment transformers, in particular to an epoxy resin insulation transformer. Background technique [0002] In the prior art, there is a dry-type transformer cast with epoxy resin, which includes high-voltage coils and low-voltage coils arranged concentrically. The high-voltage coils and low-voltage coils are integrally cast in epoxy resin, and the epoxy resin is filled with The gap between the high voltage coil and the low voltage coil. Its disadvantages are: First, due to the difference between the expansion coefficient of the epoxy resin itself and the expansion coefficient of the coil copper conductor, when the temperature rises, a large internal stress will be generated between the two, which will easily cause the epoxy The cracking and deformation of the resin affect the reliability of the transformer; second, the epoxy resin is brittle, has poor impact damage resistance, and relatively poo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/32H01B3/40
Inventor 杨立稳
Owner JIANGSU YAWEI TRANSFORMER
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