Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Electrical insulation material and transformer

A technology of electrical insulating paper and oil-immersed transformers, applied in the direction of heterogeneous insulating materials, insulators, parts of transformers/inductors, etc., can solve problems such as limitations

Active Publication Date: 2016-09-07
3M INNOVATIVE PROPERTIES CO
View PDF8 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The maximum operating temperature of a liquid-immersed transformer utilizing kraft paper isolation is limited by the thermal properties of the kraft paper

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electrical insulation material and transformer
  • Electrical insulation material and transformer
  • Electrical insulation material and transformer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0043] Examples and comparative examples provided below are provided to facilitate the understanding of the present invention, and these examples and comparative examples should not be construed as limiting the scope of the present invention. All parts and percentages are by weight unless otherwise indicated. The following illustrative examples and comparative examples were evaluated using the test methods and protocols described below.

[0044] Sample Preparation :

[0045] Exemplary electrically insulating nonwoven papers were made using methods known in the art, as follows:

[0046] 6% by weight of microglass (B-04 from Lauscha Fiber International), 64% by weight of exfoliated kaolin (HYDRAPRINT from KaMin, LLC, USA), 13% poly(vinyl alcohol) fibers (from Minifibers Inc, USA, fully hydrolyzed, 1.8 denier x 6 mm, fiber tenacity of 13 g / denier) and 17 wt% of (HYCAR 26362 from Lubrizol Corp) was dispersed in water to form a slurry with a solids content of about 2% by wei...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

An article comprises an inorganic filler, fully hydrolyzed polyvinyl alcohol fibers, a polymer binder, and high surface area fibers. The article can be formed as an electrically insulating paper for electrical equipment, such as a liquid filled transformer, which can thereby be substantially cellulose free.

Description

technical field [0001] The present invention relates to materials suitable for use in electrical insulation applications. In particular, the invention relates to electrical insulating materials suitable for use in transformers, such as liquid-immersed transformers. Background technique [0002] Electrical equipment such as electric motors, generators and transformers often require some form of dielectric insulation to isolate adjacent conductors. A common insulating material is kraft paper, a cellulose-based material commonly utilized in liquid-immersed transformers. [0003] However, cellulose paper has several disadvantages, such as high moisture absorption, generation of water when degraded, and limited thermal performance. Current liquid-immersed transformers require a moisture content of less than 0.5% by weight in order to operate reliably throughout the designed product life of the liquid-immersed transformer. Water contamination in liquid-immersed transformers lea...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01B3/02H01B7/02
CPCD21H13/16D21H17/67D21H21/18D21H13/10D21H13/40H01B3/002H01B3/28H01B3/448H01B3/47H01F27/327H01F27/2876
Inventor 罗伯特·H·特平雷撒·M·布鲁宁大卫·V·马奥尼米切尔·T·黄大卫·S·斯坦克斯马丁·H·福克斯
Owner 3M INNOVATIVE PROPERTIES CO
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com