High voltage electrode device for space charge measuring system by electroacoustic pulse method

Abstract

The present invention relates to high voltage electrode device for space charge measuring system operating on electroacoustic pulse method, and belongs to the field of electroacoustic pulse method space charge measuring technology. The device includes earthed shielding metal shell, insulator supporting column and high voltage metal electrode column connected to the lower end of the supporting column, insulating resin packing part around the high voltage metal electrode column and earthed electrode plate below the high voltage metal electrode column. The device features that it also includes one upper shielding disc inside the shielding metal shell and one lower shielding disc on the earthed electrode plate. These two shielding discs have center hole for the high voltage metal electrode column to pass through and mutual inserting uneven structures in the opposite surfaces. The present invention can eliminate interface between solid and air surface, increase air surface distance and raise the puncture voltage greatly.

Description

technical field [0001] The invention belongs to the technical field of space charge measurement by electroacoustic pulse method, and particularly relates to the design of the electrode structure using an air-free interface insulation barrier with a concave-convex structure in the high-voltage electrode of the system to improve the breakdown voltage of the electrode. Background technique [0002] Electroacoustic pulse method space charge measurement technology is a popular measurement technology of solid dielectric space charge in the world. However, the currently widely used electrodes in this measurement technique have some problems that make their use difficult. figure 1 A typical electrode device structure of this type includes a grounded metal shielding shell 1, an insulator support column 2 is fixed in the metal shielding shell 1, and a metal electrode column 3 used as a high-voltage electrode connected to the lower end of the support column 2 is used to fill in the An...

AI Technical Summary

Problems solved by technology

On the one hand, this becomes the bottleneck that limits the maximum value of the applied experimental voltage, so that some experiments that require high voltage and high field strength cannot be carried out; on the other hand, the creepage breakdown strength between the high voltage electrode 3 and the ground electrode 6 depends on the sample size, which limits the size of the sample used in the electrode device cannot be too small, which makes some materials and processes that are difficult to make a large sample cannot be tested by this method

This has brought certain difficulties to the use of the system.

Images