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

Detection method for rejecting mica paper capacitor degraded product

A technology of mica paper capacitor and detection method, applied in the direction of testing dielectric strength, etc., can solve problems such as breakdown of mica capacitor, and achieve the effects of excellent insulation performance, high electrical performance qualification rate, and improved service life.

Active Publication Date: 2013-05-01
四川泛华航空仪表电器有限公司
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the mica capacitor works at high voltage, these small impurities may cause the breakdown of the mica capacitor

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
  • Detection method for rejecting mica paper capacitor degraded product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The test of CVG-001 mica paper capacitor is to convert 180mmHg into atmospheric pressure, and the difference between the actual atmospheric pressure and the day’s actual atmospheric pressure, so as to obtain the atmospheric pressure created by the sealed box, and put the CVG-001 mica paper capacitor into the sealed box for use The vacuum pump reduces the air pressure in the box to the required air pressure value, and then applies a DC voltage of 4.5kV to the CVG-001 mica paper capacitor for 30s.

Embodiment 2

[0020] The CV40-006 mica paper capacitor test is to convert 180mmHg into atmospheric pressure, and the difference between the actual atmospheric pressure and the day’s actual atmospheric pressure, so as to obtain the atmospheric pressure created by the sealed box, and put the CV40-006 mica paper capacitor into the sealed box for use The vacuum pump reduces the air pressure in the box to the required air pressure value, and then applies a DC voltage of 4.5kV to the CV40-006 mica paper capacitor for 60s.

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

No PUM Login to View More

Abstract

The invention discloses a detection method for rejecting a mica paper capacitor degraded product. By the method, the exposure probability of unqualified and poor electrical properties of a mica paper capacitor in a low-air pressure and high-voltage state can be remarkably improved, and the degraded product can be rejected in advance. According to the technical scheme, the method comprises the following steps of: a) converting the altitude of a working environment of the mica paper capacitor into atmospheric pressure, comparing the converted atmospheric pressure with actual atmospheric pressure during a test, and calculating atmospheric pressure required by detection equipment; b) placing the mica paper capacitor to be tested into a sealed box of the detection equipment, vacuumizing the sealed box by utilizing a vacuum pump on the detection equipment, and monitoring whether atmospheric pressure in the sealed box reaches a required atmospheric pressure value or not by using an air pressure gauge connected to the sealed box; and c) applying working voltage of which a voltage value is 1.5 to 2.2 times that of the rated voltage of the mica paper capacitor to the mica paper capacitor in the sealed box by using voltage application equipment of the detection equipment, preserving the voltage for 30 to 90 seconds, and testing dielectric withstanding voltage.

Description

technical field [0001] The invention relates to a method for detecting the electrical properties of mica paper capacitors under low pressure and high voltage conditions. Background technique [0002] Mica is an inorganic non-metallic material with excellent electrical properties and has cleavage properties. It is easily peeled off from a plane and has high electrical strength in the direction perpendicular to the peeled surface in the air. It has long been an electrical A very important insulating material for industry. For example, cy-type capacitors with natural mica sheets as the main medium are widely used as precision capacitors in various electronic devices. High-voltage, large-capacity, high-power high-quality mica paper capacitors have large specific energy, small inherent inductance, and low dielectric loss, and have been used in high-frequency industrial high-frequency heating and quenching equipment. The product has excellent performance and high reliability. It...

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): G01R31/12
Inventor 徐磊
Owner 四川泛华航空仪表电器有限公司
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