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High thermal conductivity insulating member and its manufacturing method, electromagnetic coil, and electromagnetic device

A technology of insulating components and high thermal conductivity, which is applied in the direction of transformer/inductor coil/winding/connection, coil, insulator, etc., which can solve the problems of insufficient thermal conductivity, labor-intensive manufacturing, and increased cost to achieve excellent heat dissipation characteristics Effect

Inactive Publication Date: 2005-09-07
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if the electromagnetic coil of this prior document is used, since the heat flow is insulated by the mica layer, it is difficult to obtain a high thermal conductivity
[0007] In this way, the use of conventional electrical insulating materials has problems such as not being able to obtain sufficient thermal conductivity, and its manufacture is labor-intensive, time-consuming, and cost-increasing.

Method used

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  • High thermal conductivity insulating member and its manufacturing method, electromagnetic coil, and electromagnetic device
  • High thermal conductivity insulating member and its manufacturing method, electromagnetic coil, and electromagnetic device
  • High thermal conductivity insulating member and its manufacturing method, electromagnetic coil, and electromagnetic device

Examples

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no. 1 Embodiment approach

[0075] Below, refer to Figure 1- Figure 8 The first embodiment of this embodiment will be described.

[0076] First, production of the mica tape of this embodiment will be described with reference to FIG. 1 .

[0077] Mix 3000cc of water into 2.826g of mica flakes, and stir (process K1). In this case, a small amount of epoxy resin can also be added as an adhesive.

[0078] According to the procedure of papermaking, the above-mentioned stirred mixture is passed through, for example, a 0.5 mm×0.5 mm grid to prepare a green sheet (step K2). This green sheet is heated at a predetermined temperature and dried to obtain a mica paper 1 (step K3).

[0079] In the lining material manufacturing process B1 of this embodiment, first, the binder resin, boron nitride particles, and carbon black particles are mixed in a mass ratio of 24.7:74.2:1.1 and mixed (step S1) . In this example, Asahisa-Mal (trade name) manufactured by Asahi Kabon (Carbon Black) Co., Ltd. was used as the carbon ...

no. 2 Embodiment approach

[0108] Next, refer to Figure 9- Figure 11 The second embodiment will be described.

[0109] In the member of this embodiment, the mica layer is filled with highly thermally conductive particles. Lining material adopts glass fiber cloth 25. 2.83 g of mica flakes and 0.125 g of alumina particles were mixed into 3000 cc of water, followed by stirring (step S21). In this example, NanoTek Al 2 O 3 -HT (product model) manufactured by Nippon Shi-ai Chemicals Co., Ltd. was used as the alumina particles. The average particle diameter of the alumina particles was 70 μm. The shape of the alumina particles is spherical. The mica flakes are made of sintered mica. The average particle size of mica flakes is 15 μm.

[0110] According to the procedure of papermaking, the above-mentioned stirred mixture is passed through, for example, a 0.5 mm×0.5 mm grid to prepare a green sheet (step S22 ). This green sheet was heated and dried at 120° C. to obtain a mica paper (step S23 ).

[0111]...

no. 3 Embodiment approach

[0115] Below, refer to Figure 12 The third embodiment will be described. In the mica tape 10A of this embodiment, the mica layer 9 is filled and dispersed with first particles having a thermal conductivity of 0.5 W / mK or more. In this embodiment, the mica layer 11 is manufactured by a common method, and the lining material is a thermally conductive sheet 9 with high thermal conductivity. In this case, the mica layer 11 functions as a thermal barrier since the thermal conductivity of the mica layer 11 is small compared with the lining material layer 9 .

[0116] Here, when forming the mica paper, the alumina particles with an average particle diameter of 70 nm and the mica paper were mixed. Specifically, mica paper and alumina particles were stirred in distilled water, coated on glass fiber cloth having a mesh size of 0.05 μm, and dried to form mica flakes. The mica sheet itself has a thermal conductivity of about 0.6 W / mK, but if the mica layer 11 formed of only mica paper...

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Abstract

A tape- or sheet-shaped high thermal conductivity insulating member, its manufacturing method, an electromagnetic coil comprising the high thermal conductivity insulating member, and an electromagnetic device such as a power generator having the electromagnetic coil. It is necessary to improve the cooling performance of an electromagnetic coil of an electric device so as to enhance the efficiency and to reduce the size and manufacturing cost. For the enhancement, it has been tried to increase the thermal conductivity of a tape- or sheet-shaped insulating member of the electromagnetic coil. However, there have been problems that the thermal conductivity of conventional insulating members has been insufficient, and only special resin components can be used. To solve the above problems, according to the invention, the tape- or sheet-shaped insulating member is made of a material such that first particles having a thermal conductivity of 1 to 300 W / mK and second particles having a thermal conductivity of 0.5 to 300 W / mK are dispersed in a resin base.

Description

technical field [0001] The present invention relates to a strip-shaped or sheet-shaped high thermal conductivity insulating part used for electromagnetic coils of electromagnetic equipment such as generators, motors, and transformers and a manufacturing method thereof, and also relates to electromagnetic coils and components manufactured using high thermal conductivity insulating parts. electromagnetic equipment. Background technique [0002] In order to increase the efficiency, size, and cost of electromagnetic equipment, it is necessary to improve the cooling performance of electromagnetic coils. As one of the methods of improving the cooling performance of the electromagnetic coil, it is to impart high thermal conductivity to an electrically insulating strip-shaped or sheet-shaped member used around the electromagnetic coil. [0003] The thermal conductivity of conventional electrical insulating materials is in the range of 3 to 37 W / mK. Japanese Patent Application Laid...

Claims

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Application Information

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IPC IPC(8): H01F5/06H01F27/22H01F27/32H01F41/12
CPCH01F27/327H01F5/06H01F27/22H01F41/127H01F27/323
Inventor 冈本彻志土屋宽芳泽史雄岩田宪之小山充彦铃木幸男铃木明彦大高彻石井重仁长野进
Owner KK TOSHIBA
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