RU1781755C - Discharge switch - Google Patents

Description

The invention relates to dischargers and can be used in high voltage pulse installations.

A laser discharge is known, comprising two electrodes with holes through which a beam passes and which serves to initiate a discharge between them.

A disadvantage of the known device is the use of additional windows in the arrester, which serve to transport the laser beam into the interelectrode space of the arrester, reducing its reliability.

Known controlled discharge-thyratron containing two electrodes, while in the center of one of them is installed a control electrode

A disadvantage of the known device is the presence of a control electrode in one of the main electrodes, which leads to a decrease in the reliability of the entire discharge due to mechanical destruction of both electrodes both when a control discharge occurs and during a discharge between the main electrodes.

A device for ignition of a two-electrode discharger containing a pulse transformer included in the discharge circuit is known.

The aim of the invention is to increase the reliability of the discharge while maintaining speed by reducing the switching current and simplifying the design.

The aim of the invention is to increase reliability by eliminating the mechanical disruption of the control electrode.

This goal is achieved in that the arrester contains two working electrodes, one of which is connected to a voltage source and a control element made in the form of a single-turn ring inductor with a core of magnetic material and located between the working electrodes coaxially last, and

WITH

 with

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the inductor cell is commensurate with the distance between the electrodes.

A single-coil inductor is known to be used in linear induction accelerators.

Reliability of operation of the arrester is increased due to the absence of additional losses of the discharge current due to the switching on of the secondary winding of the pulse transformer, the main circuit of the discharge and load, the design of the pulse transformer and the control pulse generating circuits is simplified.

The drawing shows a device of an arrester made in the form of two identical metal electrodes 1 connected to wires between which there is a potential difference. Ring 2 made of magnetic material is covered by one turn 3 of conductive material over the entire surface. The control pulse arrives at the ends of turn 3 from a pulse generator, which is not shown in the figure, since it may have different circuit decisions and the principle of operation of the discharge renders.

The slug works as follows. In the initial state, a potential difference of such a magnitude is brought to the electrodes 1 that a breakdown between them does not occur. An additional (controlling) electric field strength between the electrodes is created by the inductor by converting the changing current in the coil into the changing magnetic field induction in the core, which in turn will lead to the appearance of a vortex electric field E on the axis of the inductor. The relationship between fields B and E is established by the second Maxwell equation. 3B

at

When the induction of the magnetic field in the core on the axis of the inductor changes

a vortex electric field, which is determined by the expression

 e at where e is the height of the core,

S is the cross section of the core,

dv

tu is the rate of change of induction.

Since the inductor winding is supplied by rectangular pulses from the generator, the inductor eddy field strength will be determined

P 1 M e tu

where DW is the increment of induction in the core during the pulse.

Thus, due to the additional electric field created by the inductor between the working electrodes, the arrester breaks through.

In the test of the arrester, two high voltage regulated voltage sources up to 16 kV and 40 kV were used. The intensity of the electric field for controlling the discharge was created by a single-turn inductor made on a M2000 NM1 ferrite ring. The capacitor FGTI-4700 50 kV discharged through the thyratron TGI-1-500 / 16 to the coil of the inductor. An adjustable voltage of up to 40 kV was applied to the electrodes of the discharge, which charged the capacitor K75-25 0.01 x50 kV. During breakdown of the electrodes, it decomposed the resistance TVO-60-24 Ohm. The thyratron was controlled from the G-5-54 generator through a submodulator.

Thus, the use of an inductor to control the discharge, in addition to increasing Reliability, will simplify its manufacture, since the same electrodes can be used, which in turn will lead to an increase in the number of trips.

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