RU2102834C1 - Generator of high-voltage rectangular pulses - Google Patents

Abstract

FIELD: electric power supply for electrophysical equipment. SUBSTANCE: device has accumulating capacitors, dischargers, charging resistors and power supply, correcting circuit which has at least one capacitor which is by-passed by inductance coil and discharger. Goal of invention is achieved by introduced controlled power supply, which is connected to capacitor of correcting circuit, and discharger, which is inserted between correcting circuit and accumulating capacitors of generator. EFFECT: rectangular shape of pulses, increased dynamic range of load resistance. 2 dwg

Description

 The invention relates to the field of high-voltage pulse technology and can be used as a source of pulsed power for various electrophysical installations.

 Known high voltage pulse generators containing capacitors, dischargers and charging resistors, built on the principle of parallel charging of many capacitors with their subsequent switching with spark gaps to a series connection circuit (Arkadyev-Marx circuit).

 A rectangular-shaped high-voltage pulse generator [1] is also known in which a correction circuit of at least one capacitor shunted by an inductance and a spark gap is connected between the storage capacitors and the ground, thereby achieving a constant amplitude of the generated pulse.

 A rectangular-shaped high-voltage pulse generator [2] is also known, which contains, in addition to the correcting circuit, a stabilizing circuit consisting of a capacitor shunted by inductance. The stabilizing circuit is connected in series with the capacitor of the correction circuit.

 A disadvantage of the known devices is that the squareness of the generated pulse is ensured only with a strictly defined value of the load resistance.

 The objective of the invention is to provide the formation of a high voltage pulse of a rectangular shape in a wide range of changes in load resistance without changing the parameters of the generator circuit.

где U_к и U₁ напряжения на конденсаторе корректирующей цепочки и накопительном конденсаторе одной ступени соответственно;
n количество ступеней генератора;
L индуктивность корректирующей цепочки;
R сопротивление нагрузки;
C и C_к емкость накопительного конденсатора одной ступени и конденсатора корректирующей цепочки соответственно.The problem is solved in that a square-wave high-voltage pulse generator containing storage capacitors, dischargers, charging resistors and a power source, included according to the Arkadyev-Marx circuit, a correction circuit consisting of at least one capacitor shunted by an inductance and a spark gap, introduces an additional an adjustable power source connected to the capacitor of the correction circuit, and a spark gap connected between the correction circuit and the storage capacitors pa. In addition, the voltage across the capacitor of the correction circuit and the storage capacitors of the generator must satisfy the following relation:

where U _to and U _{1 the} voltage on the capacitor of the correction circuit and the storage capacitor of one stage, respectively;
n number of stages of the generator;
L inductance correction circuit;
R load resistance;
C and C _{to the} capacitance of the storage capacitor of one stage and the capacitor of the correction chain, respectively.

 In the proposed solution, when the load resistance changes, the squareness of the generated pulse is provided by regulating the voltage of the additional power source. The introduction of an additional spark gap allows an independent charge of the storage capacitors of the generator and the capacitor of the correction circuit.

 In FIG. 1 shows a circuit diagram of a rectangular high-voltage pulse generator; in FIG. 2 diagrams of voltages generated by the device.

 A rectangular shaped high-voltage pulse generator contains storage capacitors 1, 2, charging resistors 3-6, a charging device 7 for storage capacitors, a correcting circuit capacitor 8, an inductance 9, a charging resistor 10 and a correcting circuit charging device 11, dischargers 12-16, load 17.

 The generator operates as follows. Capacitors 1 and 2 are charged through the charging resistors 3-6 from the charger 7 to the voltage level. The correction circuit capacitor 8 is charged through the charging resistor 10 from the charging device 11 to a voltage level. In this case, the charge levels of the capacitor 1, 2, and the capacitor 8 are set from the condition for the required value of the voltage of the rectangular pulse.

U ₁ • n U _to U _p
where n is the number of series-connected storage capacitors;
U _p the voltage level of the rectangular pulse.

где L индуктивность корректирующей цепи;
C_к емкость корректирующего конденсатора;
R сопротивление нагрузки;
C емкость накопительных конденсаторов одной ступени.To ensure the rectangular shape of the pulse on the load when changing the value of its resistance in a wide range, the following relation should be fulfilled:

where L is the inductance of the correction circuit;
C _{to the} capacitance of the correction capacitor;
R load resistance;
C capacitance of storage capacitors of one stage.

 After the charge of the capacitors is completed, the spark gaps 12-15 are turned on in such a way that all the capacitors turn on in series with the load 17, while the voltage on the capacitor 8 has the polarity inverse to the polarity of the capacitors 1 and 2. In the process of recharging the capacitor 8 through inductance 9, the change voltage at its contacts compensates for the discharge of the capacitor 1 and 2 during the half-cycle of the recharge process. After a half-period of the recharge process, the cutting discharger 16 is turned on, which interrupts the process of the current flowing in the load 17.

The voltage shape at the contacts of capacitors 1 and 2 (curve nU ₁ ), at the contacts of capacitor 8 (nodding U _k ) and the voltage at the load (curve U _p ) are shown in FIG. 2.

 It should be noted that in the proposed solution, as well as in the known ones, the formation of a rectangular pulse is provided only when the current in the circuit of the correcting circuit significantly exceeds the value of the current in the load.

Sources of information:
1. USSR author's certificate N 540362, cl. H 03 K 3/53, 12/25/76

 2. USSR author's certificate N 465949, cl. H 03 K 3/53, 08/04/87 (prototype).

Claims (1)

A rectangular shaped high-voltage pulse generator containing storage capacitors, dischargers, charging resistors and a power source included according to the Arkadyev-Marx scheme, a correcting circuit consisting of at least one capacitor shunted by an inductance and a spark gap, characterized in that an additional an adjustable power supply connected to the capacitor of the correction circuit, and a spark gap connected between the correction circuit and the storage capacitors torus, and the capacitor voltage correcting chain and in each storage capacitor of the generator must satisfy the following relationship

where U _{to the} voltage on the capacitor of the correction circuit;
U ₁ voltage on the storage capacitor of one stage;
n number of stages of the generator;
L inductance correction circuit;
R load resistance;
C capacity of the storage capacitor of one stage;
C _to capacitor correction chain.

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