SU785963A1 - Cascade-type surge voltage generator - Google Patents

Description

(54) CASCADE PULSE VOLTAGE GENERATOR

one

The invention relates to the electrical industry and can be used in high-voltage test equipment systems.

A cascade pulse voltage generator is known that contains flat disk storage capacitors with openings in the center, uncontrollable arresters, controlled spark discharge, charging and starting devices 1.

The low reliability of this generator is explained by the long time the generator is under high voltage.

Also known is a cascade pulse voltage generator containing disk storage capacitors with openings in the center and assembled in one column, uncontrolled discharges placed opposite the openings directly on the capacitor plates, controlled by a spark, charger and charging resistors connected between their plates of storage capacitors and the poles of the charging device 12.

The stable operation of this generator is a consequence of spontaneous triggers, since for receiving voltage pulses with a steep front, it is necessary to reduce the response times of uncontrolled spark gaps. For this reason, the discharge electrodes are set at such a distance from each other that the static breakdown voltage is only a few percent higher than the charge voltage, which leads to an increase in the probability of spontaneous operation, and ultimately to a sharp decrease in the reliability of the generator.

The aim of the invention is to improve reliability.

Claims (2)

Achieved by the fact that in a well-known cascade pulse-voltage generator containing disk storage capacitors with holes in the center and assembled in one column, uncontrolled gaps placed opposite the holes on the plates of the capacitors control the spark spark, charge device and charging resistors connected between the plates of storage capacitors and poles of a charging device, controlled by a spark gap made in the form of a metal disk with a hole in the circuit tre, wherein the time-substituted-gate electrode, wherein the disk is coupled to metagashchesky dopol shtelnymi with charging capacitor and via a resistor - one of the poles of the charging device. The drawing shows the design of a cascade pulse voltage generator. The proposed impulse generator of the SRI contains disk storage capacitors 1 with holes 2 in the center, uncontrolled arresters 3, a controlled spark spark 4, a charging device connected to terminals 5, charging resistors 6, additional storage capacitors 7 and the control electrode 8. The disk storage capacitors 1 are assembled in one column, and the uncontrolled spark gaps 3 are placed opposite the openings of the storage capacitors 1, the charge storage capacitors 1 being charged The resistors 6 are connected to the terminals 5 The controlled spark gap 4 with the control electrode 8 placed in its hole is connected to the additional charging capacitors 7 and through the charging resistor 6 to one of the terminals 5 to which the charger is connected. The cascade pulse voltage generator operates as follows. Through charging terminals 5, additional charging capacitors 7 of the working voltage of the spark discharge 4. At the required moment of time, a voltage pulse is applied to the control electrode 8 located in the central hole of the controlled spark discharge 4, which leads to the last . A pulse charge of accumulative coils {1 of capacitors 1 through the spark gap of controlled spark 4 and charging resistors 6 with simultaneous illumination of the openings 2 of uncontrollable spark 3 occurs when the spark of start-up spark 4. When the voltage on storage capacitors 1 reaches the breakdown voltages of uncontrolled dischargers 3, their breakdown occurs. As a result, the storage capacitors 1 are connected in series through punched uncontrolled spark discharges 3, and a voltage pulse with a steep front occurs at the output of the cascade generator. Therefore, the cascade pulse voltage generator allows to increase the reliability of operation by eliminating the spontaneous operation of uncontrollable arresters, due to the pulsed charge of the storage condensers 1 and the short-term voltage applied to the electrodes of the arresters. The use of a pulsed charge of storage capacitors also makes it possible to extremely shorten the time spent for isolating a generator under high voltage, which ensures lower costs and a longer service life for both the insulation and the generator as a whole. Thus, the pulsed charge of the storage capacitors 1 provides the minimum values of the inductance of the charge circuit, which makes it possible to produce a charge of capacitors at high speed. In addition, during the flow of charge current after a spark gap of controlled spark times (line 4, uncontrolled spark gaps 3 are more intensively irradiated, which ensures a short spreading time when they are generated. The formula for the cascade pulse voltage generator containing disk accumulators capacitors with holes in the center and assembled in a single column, uncontrolled arresters placed opposite the holes directly on the capacitor plates, controlled by a spark arrester, charge device and charge resistors connected between the plates of the storage capacitors and the poles of the device, characterized by a T increase of reliability, controlled by a spark discharge in the form of a metal disk with a hole in the center, in which the control electrode is placed, and the metal disk is connected to additional charge capacitors and through a resistor - with one of the poles of the charger. Sources of information taken into account in the examination 1. Instruments and experimental technique, .№ 2, 1976, p. 93-95. 2. The patent of France No. 2098513, cl. H 03 K 3/00, published. 04.14.72.