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Less-resin mica tape used for high voltage motor and preparation method thereof

A technology of mica tape with less glue and high-voltage motor, which is applied in mica, chemical instruments and methods, lamination, etc., can solve the problems of no longer immersion, unusable mica tape with less glue, high glue content, etc., and achieve excellent electrical aging performance and Uniformity of electrical performance, high electrical strength, and the effect of reducing the size of the motor

Active Publication Date: 2017-07-18
SUZHOU JUFENG ELECTRICAL INSULATION SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the low-glue mica tapes used for high-voltage motors use non-calcined muscovite paper as the base material without exception, and glass cloth or film as the reinforcing material to ensure that the mica tape has good air permeability and permeability, which is beneficial The infiltration of impregnating resin during the VPI process. At this stage, it is generally believed that cooked mica paper is not suitable for making mica tape with less glue, because cooked mica paper is very easy to absorb a large amount of resin, resulting in high glue content, and it cannot be impregnated with VPI impregnated resin later. Therefore, it cannot be used for less glue mica tape, but can only be used to make more glue mica tape for molding process

Method used

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  • Less-resin mica tape used for high voltage motor and preparation method thereof
  • Less-resin mica tape used for high voltage motor and preparation method thereof

Examples

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Effect test

Embodiment 1

[0044] The present embodiment provides a kind of adhesive-less mica belt and its preparation method that are suitable for high-voltage motors, and its structure is as follows figure 1 Shown; In this mica tape, adhesive is solid bisphenol A type epoxy resin (softening point is 60-80 ℃); Mica paper layer 1 is made of cooked mica paper through calcining and chemical treatment, the thickness of cooked mica paper is 0.09mm, the penetration time is 41s, and the mass per unit area is 158g / m 2 (commercially purchased); the reinforcing material is electrical grade alkali-free glass fiber cloth, the thickness is 0.032mm, and the mass per unit area is 23.1g / m 2 ; The latent epoxy curing accelerator is zinc naphthenate.

[0045] The preparation method of the less rubber mica tape suitable for high-voltage motors is as follows:

[0046] (1), select cooked mica paper, adhesive and reinforcing material, the adhesive is solid bisphenol A epoxy resin (softening point is 60-80 ℃), and the rei...

Embodiment 2

[0055] The present embodiment provides a kind of adhesive-less mica belt and its preparation method that are suitable for high-voltage motors, and its structure is as follows figure 1 shown. In the mica tape, the adhesive is solid bisphenol A type epoxy resin (the softening point is 110-130°C); the mica paper layer 1 is composed of calcined and chemically treated cooked mica paper, the thickness of the cooked mica paper is 0.11mm, The penetration time is 43s, and the mass per unit area is 181g / m 2 (commercially purchased); the reinforcing material is electrical grade alkali-free glass fiber cloth, the thickness is 0.032mm, and the mass per unit area is 23.1g / m 2 ; The latent epoxy curing accelerator is zinc naphthenate.

[0056] The preparation method of the less rubber mica tape suitable for high-voltage motors is as follows:

[0057] (1), select cooked mica paper, adhesive and reinforcing material, the adhesive is solid bisphenol A epoxy resin (softening point is 110-130°...

Embodiment 3

[0066] The present embodiment provides a kind of adhesive-less mica belt and its preparation method that are suitable for high-voltage motors, and its structure is as follows figure 1 Shown; In this mica tape, adhesive is solid bisphenol F type epoxy resin (softening point is 110-130 ℃); Mica paper layer 1 is made of cooked mica paper through calcining and chemical treatment, and the thickness of cooked mica paper is 0.09mm, penetration time is 40s, mass per unit area is 162g / m 2 (commercially purchased); the reinforcing material is electrical grade alkali-free glass fiber cloth, the thickness is 0.032mm, and the mass per unit area is 23.1g / m 2 ; The latent epoxy curing accelerator is zinc isooctanoate.

[0067] The preparation method of the less rubber mica tape suitable for high-voltage motors is as follows:

[0068] (1), select cooked mica paper, adhesive and reinforcing material, the adhesive is solid bisphenol F epoxy resin (softening point is 110-130°C), and the reinfo...

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Abstract

The invention discloses a less-resin mica tape used for a high voltage motor and a preparation method thereof. The less-resin mica tape comprises a mica paper layer, a reinforced material layer, and an adhesive layer. The mica paper layer is formed by a piece of prepared mica paper. The preparation method comprises steps that step1, the prepared mica paper, the adhesive, and the reinforced material are selected; step2, uniform printing, spraying, or frictioning of solvent-free solid adhesive or semi-solid resin adhesive on the prepared mica paper or the reinforced material is carried out; step3, the hot pressing synthesis of the prepared mica paper and the reinforced material is carried out to form a mica tape blank material; step 4, cure accelerator prepared into solution is sprayed on the mica tape blank material, and permeates in the mica tape blank material. The less-resin mica tape has advantages of enhanced electrical intensity, excellent electrical aging performance, electrical performance uniformity, and ability of satisfying requirements of advanced less-resin VPI technology on permeability of mica tapes.

Description

technical field [0001] The invention belongs to the technical field of glue-less vacuum pressure impregnation (VPI) insulation treatment, and in particular relates to a less-glue mica tape suitable for high-voltage motors and a preparation method thereof. Background technique [0002] At present, large-scale high-voltage motors mainly adopt two insulation treatment processes: less glue vacuum pressure impregnation (VPI) and more glue molding; The new process of VPI insulation with mica tape as the main insulation material produces high-voltage motors. Because the less glue VPI main insulation increases the mica content, on the one hand, it can greatly reduce the insulation thickness, and at the same time, it also improves the performance of the motor's withstand voltage, corona resistance and other aspects, which makes a qualitative leap in the technical level of high-voltage motors, so it is obtained. a wider range of applications. [0003] It is known that mica tape is u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B17/60H01B17/66H01B3/04H01B19/00B32B19/04B32B37/06B32B37/10B32B37/12B32B38/00
CPCB32B19/04B32B37/06B32B37/10B32B37/12B32B38/00B32B2038/0076B32B2255/26B32B2307/206B32B2307/552B32B2457/00H01B3/04H01B17/60H01B17/66H01B19/00
Inventor 夏宇王文李翠翠陆春周成
Owner SUZHOU JUFENG ELECTRICAL INSULATION SYST
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