Unlock instant, AI-driven research and patent intelligence for your innovation.

Varistor-based field control tape

A resistance and variable technology, applied in the field of nonlinear electronic materials and equipment, can solve problems such as difficult production, and achieve the effect of reducing density, easy production, and significant electrical nonlinearity

Inactive Publication Date: 2008-06-18
ABB RES LTD
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Clearly, the above-mentioned complex over-fill systems are difficult to produce

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] Field control is required for electric motors and generators, cables, bushing coils and any insulated conductors passing through a coaxial ground grid. For these and other purposes, the present invention provides a non-linear electrical tape for electrical equipment, especially high-voltage electrical equipment, the belt comprising a matrix impregnated with a binder such as epoxy resin containing inorganic filler particles, wherein the filler particles Contains microvaristor particles containing doped zinc oxide (ZnO).

[0015] Compared with conventional ribbons based on SiC-containing particles or SnO-doped coated particles, the inventive ribbon comprising a ZnO microvaristor is advantageous in many respects. The nonlinear behavior of SiC ribbons depends on the contact between SiC and SiC particles, but also on the SiC grade, ribbon processing and handling, and ribbon degradation under voltage overload. Conversely, the non-linearity of ZnO-doped bands is a property ge...

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
densityaaaaaaaaaa
densityaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a nonlinear field control tape containing ZnO microvaristor particles. The doped ZnO particles are produced by crushing a sintered ZnO block, by desagglomeration or crushing of calcinated granulated particles, or by crushing of a calcined or sintered tape (tape casting). Embodiments, among other things, relate to: hollow ZnO microvaristor particles produced by granulation technique, having reduced average density and having diameters in a range well below 90 [mu]m; and compounding the ZnO filler in binders that are used to impregnate tapes. Compared to nonlinear field control tapes with conventional embedded nonlinear filler particles, a stronger and more reliable nonlinear resistivity is achieved and the ZnO filler is simpler to produce and to compound in the binder. The resulting tapes are flexible, preferably self-adhesive and have a strong nonlinear electrical resistivity. The tapes are useful to protect high field-stress regions in electrical components.

Description

technical field [0001] The invention relates to the technical fields of high voltage and medium voltage, in particular to nonlinear electronic materials and equipment. The invention is based on a non-linear electrical tape as stated in the preambles of the independent claims and an electrical device comprising said non-linear electrical tape. Background technique [0002] The present invention starts with the prior art described in EP1116086B1. Therein, a glow protection tape or a corona shielding tape having improved electrical properties for use in coil insulation of electric motors is disclosed. The tape consists of a fabric-like carrier material impregnated with antimony-doped tin dioxide (SnO 2 ) Reactive resin solution of filler particles. Optional hardeners and / or catalysts are added. The coated filler particles have more reliable and better reproducible nonlinear electrical properties than commonly used silicon carbide (SiC) fillers. The over-fill system is spec...

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): H01B3/00H01B17/42H01C7/112H02K3/40
CPCY10T428/25H01C7/1006H01C7/112Y10T428/28H02K3/40
Inventor L·唐泽尔X·科恩曼F·格鲁特
Owner ABB RES LTD