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PEA space charge and conduction current testing device based on three electrodes

A test device, space charge technology, applied in the direction of measuring device, only measuring current, measuring current/voltage, etc., can solve the problems of inability to conduct current and space charge for research, conduction current cannot be measured, and easy to cause coupling, etc. Achieve reliable insulation, reduce contact noise, and eliminate surface current effects

Inactive Publication Date: 2020-07-10
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the equipment for measuring space charge made by this method is relatively mature. Although the traditional space charge test device has many advantages, it has the following disadvantages: the function is simple; both the pulse input port and the high voltage input port are introduced from the upper electrode, which is easy Causes coupling; only DC voltage can be applied; the conduction current flowing through the material during the pressure application cannot be measured
Therefore, it is necessary to design a PEA test system that can measure conduction current and space charge at the same time, so as to solve the problem that the above-mentioned prior art cannot link conduction current and space charge for research.

Method used

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  • PEA space charge and conduction current testing device based on three electrodes
  • PEA space charge and conduction current testing device based on three electrodes
  • PEA space charge and conduction current testing device based on three electrodes

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specific Embodiment approach 1

[0026] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 1. A three-electrode based PEA space charge and conduction current testing device described in this embodiment, the described three-electrode based PEA space charge and conduction current test device includes a DC high voltage power supply 1, a pulse Generator 8, test device 3, oscilloscope 7, electrometer 5 and computer 6;

[0027] The high-voltage DC power supply is electrically connected to the upper electrode of the test device and a microammeter 2 is connected in series to measure the full current flowing through the loop;

[0028] The inner ring electrode of the test device is electrically connected to the electrometer, and a DC resistance 4 is connected in series therebetween;

[0029] The central electrode of the test device is electrically connected to the oscilloscope;

[0030] The oscilloscope is electrically connected to the pulse generator, the pulse generator is electrically connected to the test device, th...

specific Embodiment approach 2

[0031] Specific embodiment 2. This embodiment is a further description of a three-electrode based PEA space charge and conduction current test device described in specific embodiment 1. The test device includes an electrode system, a PVDF sensor and a preamplifier .

specific Embodiment approach 3

[0032] Specific Embodiment Three. This embodiment is a further description of a three-electrode based PEA space charge and conduction current testing device described in Embodiment One. The electrode system includes an upper electrode 9 and a lower electrode 11, so The lower electrode is in the form of a combination of central electrode 14, inner ring electrode 13 and outer ring electrode 15, between the outer ring electrode and the inner ring electrode, between the inner ring electrode and the center An insulating layer 12 is filled between the electrodes.

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Abstract

The invention discloses a PEA space charge and conduction current testing device based on three electrodes. Although a traditional space charge testing device has many advantages, the following defects exist that a function is simple; a pulse input port and a high-voltage input port are introduced from an upper electrode so that coupling is easily caused; only a direct-current voltage can be applied; and a conduction current flowing through a material in a pressure applying process cannot be measured. The PEA space charge and conduction current testing device based on the three electrodes comprises a direct-current high-voltage power supply (1), a pulse generator (8), a testing device (3), an oscilloscope (7), an electrometer (5) and a computer (6). The device is used for PEA space chargetesting.

Description

technical field [0001] The invention belongs to the technical field of high voltage and insulation, in particular to a three-electrode-based PEA space charge and conduction current testing device. Background technique [0002] Space charge is an important parameter to characterize the electrical properties of dielectric materials, and the measurement of space charge is of great significance to the study of dielectric properties of dielectrics. At present, it is generally recognized internationally that space charges have a distortion effect on the electric field, and the distribution and movement of space charges have a strong impact on the conductance, breakdown damage, aging, etc. of insulating materials. Under the action of an electric field, especially a DC electric field, the accumulation of space charges will seriously distort the electric field distribution in the polymer, store electromechanical energy, and cause charge recombination and excitation, leading to early ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/24G01R19/00
CPCG01R19/0092G01R29/24
Inventor 陈明华周文奇
Owner HARBIN UNIV OF SCI & TECH