A Method for Measuring Infinite High Frequency Relative Permittivity of Insulating Dielectric

Abstract

The invention discloses a measurement principle of the infinite high frequency relative permittivity of an insulating dielectric, which solves the technical problem that the infinite high frequency relative permittivity of the insulating dielectric cannot be accurately measured. The basic principle of the present invention is to use a high-voltage DC power supply to polarize the measured dielectric, and then use an acquisition system composed of an electrometer, an electrostatic voltmeter and a computer to realize the collection and recording of the short-circuit current and recovery potential time-domain spectrum of the measured insulating dielectric , through the least squares fitting to accurately obtain the initial time change rate of the recovery potential, from the initial time change rate of the recovery potential and the short-circuit current I d (t 1‑ ), through the formula to obtain the infinite high-frequency relative permittivity ε ∞ Measurement.

Description

A method for measuring the relative permittivity of insulating dielectrics at infinite high frequency technical field The present invention relates to the dielectric parameter measurement field of insulating dielectric, particularly relate to a kind of insulating dielectric infinitely high Frequency relative permittivity measurement method. Background technique [0002] Insulating dielectrics are materials that constitute the insulation of electronic devices and power equipment, and serve as electrical insulation, mechanical support and External encapsulation, etc. Relative permittivity at a given frequency (ε r ) is the expression of the action of the insulating dielectric in the electric field at a certain frequency One of the important technical indicators of low insulation performance, defined as the dielectric permittivity of the insulating medium and the vacuum permittivity at a given frequency (ε 0 ), where the vacuum dielectric constant (ε 0 ) is a...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the technical problem that the infinite high frequency relative permittivity of the insulating dielectric cannot be accurately measured, the present invention proposes a method for measuring the infinite high frequency relative permittivity of the insulating dielectric, the purpose of which is to conveniently and accurately measure the infinite high frequency relative permittivity constant

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