SU930605A1 - Device for short-circuiting capacitor of high-voltage pulse current generator - Google Patents

Description

The invention relates to high-voltage pulse technology and can be used in high-power pulse current generators.

A device for shorting the capacitor of a high-voltage pulse current generator, including a capacitor and a spark gap, connected in parallel with the capacitor of the generator [1] ·.

However, in this device it is difficult to adjust the shape of the current pulses in the load.

A device is known for short-circuiting a high-voltage capacitor, a current pulse generator containing a three-gap spark gap, a resistor is connected in parallel to each gap of the spark gap, and a capacitor is parallel to each pair of neighboring gaps. The shape of the current pulse ej load is determined by the.

device, which depends on the charging · r> voltage of the capacitor of the pulse-current generator2 and on the magnitude of the breakdown voltage of the gap of the spark gap [2 J.

However, a change in the charging voltage leads to a distortion of the shape of the current pulse in the load. To stabilize the shape of the current pulse in the load when changing the charging voltage of the generator and when controlling the moment of switching on the shorting device, it is necessary to control the breakdown voltage of each gap of the shorting device, which is difficult to configure.

The aim of the invention is to stabilize the shape of the current pulse in the load and simplify regulation.

For this purpose, in the device for short-circuiting the capacitor of a high-voltage pulse current generator operating on an inductive-active load, containing a three-gap arrester, a resistor is connected in parallel to each gap, and a capacitor is connected to each pair of neighboring gaps, the arrester is connected to the capacitor of the high-voltage pulse generator currents through an additional gap shunted by an additional resistor, an additional capacitor is connected in parallel with the three-gap gap, connected to an adjustable voltage source.

The drawing shows a circuit diagram of a device.

The device contains a capacitor 1, a spark gap 2, an active inductive load 3, gaps 4 ~ 7 of the spark gap., Resistors 8 - 10, an additional resistor 11, an additional capacitor 12, capacitors 13 and 14, an adjustable voltage source 15.

A device for shorting capacitors of a pulse current generator operates as follows.

Depending on the charging voltage U _{o of the} capacitor 1 and on the required moment of shorting, the required voltage U | on the capacitor 12 using an additional adjustable voltage source 15. In the operation mode with forced bypass time and. <Is maintained unchanged, regardless of the generator charging voltage. In this case, the capacitors 13 and 14 through the voltage divider from the resistors 8-11 are charged to levels equal to 3/4 Up, as a result of which gaps 4 and 6 are set to voltage equal to 1/4 Up at the gap 5-1 / 2U <. Gaps 4-6 are configured so that these voltages are 1/3 of the discharge voltage.

The voltage at the gap 7 is set equal to U, (- Uq. The gap 7 has a constant discharge voltage equal to the difference between the voltage and voltage across the capacitor 1 at the time of shorting.

After the breakdown of the spark gap 2 and as the capacitor 1 is discharged, the voltage across the gap 7 reaches the breakdown voltage and the gap shorts. After this, the discharge of the capacitor 12 begins and as the discharge of this capacitor, the voltages at the gaps 4-6 increase and reach breakdown, as a result of which conditions are created for shorting all the gaps of the device.

By selecting the capacitances of the capacitors 12–14 and connecting them inductively to the arrester, a weak mutual influence of the spikes and the operation of individual gaps is ensured. Due to this, the necessary voltage is maintained at the unbreakable gaps.

Thus, the proposed device has the following advantages over the known: it does not require regulation of the discharge voltage of the gap of the arrester when changing the charging voltage of the generator or changing the moment of shorting; stabilization of the device response time and, consequently, of the shape of the 2Q current pulse is performed using an additional adjustable voltage source, and the shorting time is controlled using the same source, which greatly simplifies the work with the device.

Claims (2)

The invention relates to high-voltage impulse technology and can be used in high-power impulse current generators. A device for short-circuiting a capacitor of a high-voltage pulse current generator, including a capacitor and a discharge device, connected in parallel with the generator capacitor is known. However, it is difficult to control the shape of the current pulses in the load in this device. A device for short-circuiting a capacitor of a high-voltage current pulse generator is known that contains a three-gap discharge, a resistor is connected in parallel to each discharge gap, and a capacitor is parallel to each pair of gap gaps. The shape of the current pulse E} to the load is determined by: switching on the shorting angle device, which depends on the charge on the voltage of the capacitor of the pulse current generator and on the magnitude of the breakdown voltage of the discharge gap 2. However, a change in the charge voltage leads to a distortion the shape of the current pulse in the load. In order to stabilize the current pulse form in the load, when the alternating voltage of the generator changes and when the moment of switching on the shorting device is controlled, it is necessary to regulate the magnitude of the breakdown voltage of each gap of the shorting device, which is difficult to set up. The aim of the invention is to stabilize the shape of the current pulse in the load and simplify the regulation. For this purpose, in a device for shorting a capacitor of a high voltage pulse current generator operating on an inductively active load, containing a three-gap arrester, parallel to each gap of which a resistor is connected, and a parapolar 9 is connected to each pair of adjacent gaps pulse currents through an additional gap, shunted by an additional resistor, parallel to the three-gap discharge, an additional capacitor is switched on, dsoedinenny to a regulated voltage source. The drawing shows a circuit diagram of the device. The device contains a capacitor 1, a voltage gap 2, an active-inductive load 3, gaps -7 discharge, resistors 8–10, an additional resistor 11, an additional capacitor 12, condensate 5y13 and 14, adjustable voltage source 15. The device for shorting the capacitors of the pulse current generator operates as follows. Depending on the charging voltage UQ of the capacitor 1 and on the required shorting time, the required voltage is set on the capacitor 12 using an additional controlled voltage source 15. In the mode of operation with forced torque, the shuntyr {9th and., Is kept constant, regardless of the generator alternating voltage. At the same time, capacitors 13 and 14 are charged through voltage divider from resistors 8-11 to levels equal to 3 / and, as a result, voltages equal to 1 / U are set at gaps 4 and 6 (, at gap 51/21 The gaps -6 are set so that these voltages are 1/3 of the discharge voltages. The voltage on the zozor 7 is set to and; j - UQ. The gap 7 has a constant discharge voltage equal to the difference of the voltage U and the voltage on the capacitor 1 at the moment of short-circuiting. After the discharge of the discharger 2 and after the discharge of the capacitor 1, the voltage on the gap 7 reaches After that, the discharge of capacitor 12 begins and, as it discharges of ETS, fo capacitor voltage on 3O3 (: ipax t-6 increase and reach breakdown, resulting in conditions for shortening all spans of the device. By the selection of capacitors 12-1C and their low-inductive connection to the discharge ensures a weak mutual influence of variations in the operation of individual gaps. This maintains the required voltage across the non-piercing gaps. Thus, the proposed device has the following advantages over the well-known one: it does not require adjusting the discharge voltage of the gaps of the discharge gap when the generator voltage changes or the shorting moment changes; The stabilization of the moment of operation of the device and, consequently, of the shape of the current pulse is carried out with the help of an additional controlled voltage source, and with the help of the same source the shorting torque is controlled, which greatly simplifies the work with the device. Apparatus of the Invention A device for shorting a capacitor of a high-voltage impulse current generator operating on an inductively active load, containing a three-gap arrester parallel to each gap of which a register is connected, and parallel to each pair of neighboring gaps a capacitor is included, characterized in that, in order to stabilize the pulse shape, simplify regulation, the gaiter is connected to the capacitor of the high voltage pulse current generator through an additional gap, shunted additional resistor in parallel triple-gap arrester included additional capacitor connected to a controlled voltage source. Sources of information taken into account in the examination 1. Technique of large impulse currents and magnetic fields. Ed. V.S. Komelkova, M., Atomizdat, 1970, p. H 2. Authors certificate of the USSR W 661732, cl. H 03 K 3/53, 1977 (prototype).