SU993441A1 - High-voltage impulse generator - Google Patents

Description

The invention relates to a pulse technique and can be used in physical installations to determine the dielectric strength of dielectrics, as well as in installations for the destruction of 1her rocks.

A pulse voltage generator assembled according to the Arkad'ev-Marx scheme is known, which contains a step-up KJ-, direct device, current-limiting elements, storage capacitors, and flj three-electrode arrays.

The disadvantage of this generator is the need for additional tuning of the controlled synchronizing cascade, which leads to its low reliability.

The closest in technical essence to the present invention is a pulse voltage generator consisting of a step-up rectifying device, a current-limiting element and pulse generators made according to the Arkadyev-Marx G2 scheme.

The disadvantage of the indicated generator 1 / of the voltage is the low reliability of the synchronization of the pulses on the load and the narrow zone of the steady;

triggered. The pulses from the two pulse generators arrive at the load with a time spread, since the start of operation of the indicated pulse generators is strictly not synchronized and the moment of the first and subsequent breakdowns is not exactly specified. Dischargers in the manufacturing process and in the process, operation due to erosion is not

10 may be exactly the same. specifications.

The purpose of the invention is to improve the accuracy and reliability of synchronizing the moments of discharge of two pulse generators and increasing the steepness of the voltage pulse front.

The goal is achieved by the fact that a voltage pulse generator, consisting of a rectifying step-up device, a current-limiting element and two pulse generators, made according to the Arkadyev-Marx scheme, each of which contains a storage capacitor

25 blocks and a discharge, all the cascades, except for the last, of both pulse generators are equipped with pulse transformers, the primary windings of which are included in the charging circuits of storage capacitors, capacitors I and the secondary windings are connected to the pick-up electrodes of follower capacitors , another conclusion to one of the main electrodes of the same arrays,

. In the drawing: a schematic diagram of a pulse voltage generator.

The pulse voltage generator contains a step-up rectifier device 1, a current-limiting element 2, an ignition unit 3, two generators 4 and 5 pulses consisting of three-electrode storage capacitors 6-9 and 10-13. dischargers 14-18 and 19-22, i charging units 23-25, pulse transformers 26-29 and 30-33, current-limiting impedance resistors 34 and 35, assembled, according to the Arkadyev-Marx scheme and load 36

The pulse voltage generator works as follows.

From up-rectifying device 1, charging units 23-25, primary windings-pulse transformers 26-29 and ЗОЗЗЗЗ charge storage capacitors 6.-9 and 10 cascades of generators 4 and 5 pulses are charged.

The discharge cycle starts after the supply of a firing pulse from the unit 3 of the prdzhia to the igniter of the electrically controlled three-electrode discharge switch 14 of the first stage of the pulse generator. The storage capacitor 10 of the first common cascade of impulse generators is discharged through the primary windings of pulse transformers 26 and 30 {path of discharge - through points: S - arrester 1438 - earth 39 - earth 40 - 41). At the same time, pulses are induced at their secondary windings. Voltages are applied through current-limiting resistors 34 and 35 to the firing electrodes of controlled three-electrode arresters 15 and 19 of the following stages of generators 4 and 5 pulses.

The discharges 15 and 19 are punctured in parallel and punctured and the storage capacitors 6 and 11 are discharged through the primary windings of the pulse transformers 27 and 31 and the cycle is repeated until the output voltage pulses at the load 36 are obtained.

The width of the zone of stable operation is achieved by selecting the ignition of the taero impulbs in amplitude and polarity. The pulse amplitude is controlled by the transformation ratio of the pulse transformers, while the polarity is ensured by the corresponding switching on of the ends of the secondary winding of the pulse transformer.

A prerequisite for the normal operation of the pulse voltage generator is a significant excess of the discharge period of the oscillating circuit, consisting of the storage capacitor of the cascade and the inductance of the pulse transformer, bp. commutations of the generator I1shulsny voltages.

The proposed pulse voltage generator circuit makes it possible to use it in a wider zone of operation without reconfiguring the length of the discharge gaps of the arresters, which is necessary for the known circuits.

Claims (2)

1. Author's certificate of the USSR I 760417, cl. H 03 K 3/53, 1978. 2. Authors certificate of USSR 703898, cl. H 03 K 3/53, 1978.