SU426337A1 - DEVICE FOR RESEARCH OF CROWN DISCHARGE - Google Patents

Description

one

This invention relates to electrical methods for studying properties of a corona discharge.

A pulsed corona with pulsed power or a transient discharge form is accompanied by pulses of transfer and displacement currents. In this case, only the transfer current pulses are measured, and the bias currents must be compensated.

The known methods for compensating for the pulses of the bias currents are based on the use of an A / C-circuit circuit, which, together with an additional high-voltage capacitance, is connected in parallel to the corona gap. The interconnections from the C-chain and the measuring resistance of the discharge gap are compared on a differential amplifier.

However, with such methods, the selection of adjustable elements is difficult due to a change in the capacity of the discharge gap when a corona occurs. This leads to incomplete compensation of bias currents and a decrease in measurement accuracy.

The purpose of the invention is to compensate for the bias current regardless of the change in the capacitance of the discharge gap.

This is achieved by the fact that in the proposed device for studying a corona discharge containing electrodes, one of which is made with a small radius of curvature, and a means for measuring the discharge current, the other electrode is made in the form of alternating bare and insulated conductors located close to each other and connected to a differential amplifier.

Pa drawing shows a diagram of the proposed device.

The device consists of a corona electrode 1, an insulating plane 2, bare collecting electrodes 3, insulated electrodes 4, measuring resistances 5 and 6, and an oscilloscope 7. Connecting both

resistances 5 and 6 are compared with an oscilloscope differential amplifier.

When the device is in operation, the transfer currents (ion currents) flow only to the bare electrodes 3 and are observed on the screen of the oscilloscope 7. At the same time, the bias and isolated electrodes induce bias currents that form the voltage drops across the measuring resistances. The pairings from both resistors are compared with an oscilloscope differential amplifier and mutually compensated.

The proposed offset current compensation device can be used for electrical studies of electron avalanches in

gases.

Subject invention

A device for studying the corona discharge, containing electrodes, one of which is made with a small radius of curvature, and a means for measuring the discharge current, differing in that, in order to compensate for the bias current, the other electrode is made in the form of alternating bare and insulated conductors, located close to each other and connected to a differential amplifier.