SU790158A1 - Surge voltage generator - Google Patents

Description

(54) PULSE VOLTAGE GENERATOR

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This invention relates to high voltage pulse technology and is intended to produce high voltage pulses with a short front.

A pulsed voltage generator is known for producing high voltage pulses with a short front (containing steps, having a capacitance, connected in series through 1.

The disadvantage of this generator is the limited possibility of obtaining voltage pulses with a short front.

The closest in technical essence is a generator containing steps with capacitance connected successively through arresters having the main electrodes, a dielectric installed between stages 2.

The generator works according to the following technological scheme. After charging the steps, the generator is turned on. Because of the nasichi at the steps of parasitic capacitances on the ground, the breakdown of dischargers with an overvoltage of at least two times occurs, and the main electrodes in each discharge

they are connected by a spark channel, with each discharge operating with a significant overvoltage. As a result of triggering of the dischargers, the steps of the generator are switched on in series and a voltage pulse appears on the outputs of the generator with an amplitude approximately equal to the sum of the charging voltages of the steps.

10 The disadvantage of the generator is the limited possibility of obtaining high voltage pulses with a short front, caused by an increased inductance in it, since

15 alarms have only one spark channel located on the central axis of the generator. In the described generator design, it is almost impossible to obtain multichannel breakdown of arrays.

The purpose of the invention is noJjy4eHHe high voltage pulses with the shortest front.

The goal is achieved by

Claims (2)

25 that in a generator containing steps with capacitance interconnected sequentially through arresters having main electrodes, a dielectric mounted between the stages, arresters are placed along the steps of their stages, and their main electrodes are located on the surfaces of the dielectric a. To ensure more reliable, multi-channel operation of arresters by increasing the perpendicular component of the electric field to the surface of the dielectric, the main electrodes of each arrester, having different potentials, are located on opposite surfaces of the dielectric. The reliability of a multichannel discharger operation is ensured by (increasing the perpendicular component of the electric field to the surface of the dielectric, and additional electrodes separated from the main electrodes by a dielectric are introduced into the dischargers. To achieve a more reliable multichannel discharger operation by increasing the overvoltage between their electrodes, the electrodes of the arresters are made of separate conductors. In Fig. 1, the proposed pulse generator is shown schematically. d, section; Fig. 2 shows a discharge with main electrodes of various potentials located on opposite noBep points of the dielectric, a cut; Fig. A discharge having an additional electrode separated from the main electrodes by a dielectric, a cut; 4 - intermediate discharge circuit with main electrodes made from separate conductors, general view The pulse voltage generator contains steps 1 having a capacitance, intermediate discharge 2 located across the edges of steps 1, located on the surfaces of a solid dielectric ka 3, triggering discharge having main and ignition electrodes 5 and 6, located on the surfaces of dielectric 3, resistors 7, through which stages 1 are connected in parallel, conclusions 8. A load 9 is connected to the generator. Main dischargers 2 having direct voltage Polar ITRs can be located on opposite surfaces of dielectric 3 (Fig. 2). The arresters 2 can have additional electrodes 10 separated from the core by solid dielectric 3 (. 3), and the main arresters could be made of separate conductors 11. (Fig. 4). The pulse voltage generator works as follows. After charging the steps, the generator turns on, in which the gap between the electrodes of one of the edges of the arresters 2 overlaps by electric discharge. As a result of this, the next discharge 2, due to the parasitic capacitances on the ground, a voltage occurs equal to the double charge voltage step. Due to the overvoltage and the presence on the surface of the dielectric 3 of the tangential and perpendicular components of the electric field to this surface due to the specified location of the main electrodes between the electrodes of the discharge 2, a multichannel discharge develops. After the second discharge occurs, the other discharges 2 work similarly to by overvolting at least twice and with multichannel character, cover the gaps between the main electrodes. When the last discharge on the load 9 overlaps, a high voltage pulse is formed, having an amplitude approximately equal to the sum of the ground voltages of the individual stages 1. The multichannel nature of the discharge in the discharge 2 and the arrangement of the discharge at the edges of the stages 1 reduces the inductance of the generator and provides receiving on load 9 voltage pulses with a short front. The arrangement of the main electrodes of the discharge 1, having different potentials, on opposite surfaces of the dielectric 3 (Fig. 2) is the same as the introduction of additional electrodes 10 (Fig. 3) into the discharges, separated from the main ones by the dielectric 3, on which the main electrodes, enhances the perpendicular component of the electric field of the arrester electrodes to the surface of the dielectric and thereby facilitates the multichannel operation of the arresters. The execution of the electrodes from the individual conductors 11 (see Fig. 4) reduces the self-capacitance of the arresters 2, which, when the first generator arresters are triggered, makes the distribution of the overvoltage on the not yet triggered arrays more uneven and, thus, increases the overvoltage of the discharge Monitors 2. This increases the reliability of the multichannel generator operation. The location in the generator of the electrodes of the arresters 2 on the surfaces of the dielectric 3 and the placement of these arrays at the edges of the stages 1, the location of the main electrodes having different potentials on opposite surfaces of the dielectric 3 and the introduction into the arrays of additional electrodes 10 separated from the main electrodes by the dielectric 3, the implementation of arrester electrodes from individual conductors 11 reduces the inductance of the pulse voltage generator, and thus. reduces the duration of the front of the received pulse by 20–50% in comparison with the known generator. The length of the front of the voltage pulse produced in the proposed generator is also reduced by reducing the resistive component of the switching of the arresters, which in a multichannel discharge has a smaller value than in a single channel. Claims 1. A pulse voltage generator comprising steps, having a capacitance, connected between -consistently through arresters, having main electrodes, a dielectric mounted between the steps, characterized in that, with the aim of obtaining the highest voltage pulses with the shortest The front, arresters are placed along the edges of the steps, and their main electrodes are located on the surfaces of the dielectric. 2. The generator nqn.l, is also distinguished by the fact that the main electrodes of each unit with different potentials are located on opposite surfaces of the dielectric. 3. The generator according to claims 1, 2, about tl and the fact that additional electrodes are introduced into the arresters, separated from the main electrodes by a dielectric. 4. Generator popp. 1, 2 and 3, distinguished by the fact that, in order to increase the reliability of the generator, the arresters' electrodes consist of separate conductors. Sources of information taken into account in the examination 1. Instruments and experimental equipment, No. 3, 1976, pp. 142-144. 2. Instruments and equipment experiment, ta, № 4, 1976, p .. 9u8.2 P PGZ