SU1758843A1 - High-voltage thyratron commutator - Google Patents

Abstract

Usage: in pulse modulators. Essence: the device contains four capacitors 1,2,5 and 7, two thyratrons 3 and 10, two pulse transformers 4 and b, a switching element 8 and a control bus 9. 1 il.

Description

This invention relates to high voltage pulse technology and can be used in pulse modulators.

A switching system is known, comprising a driver for controlling pulses, two thyratron switches, the set of which are connected through the windings of a pulse transformer to the driver.

The disadvantage of this switching system is the need for high-voltage discharging between the primary and secondary windings in a pulse transformer, which reduces the reliability of the entire switching system.

The closest technical solution is a high-voltage thyratron switch containing a control pulse driver, two series-connected thyratron switches, and the grid of the first thyratron is connected to the driver via a delay line.

A disadvantage of the known high-voltage thyratron switch is the low reliability of its operation, due to the non-synchronous switching on of the thyratrons. This is due to the use of various elements in their control circuits, which leads to different distortions of the shape of the control pulses arriving at the thyratron networks. In addition, the use of a pulse transformer with high-voltage isolation between the windings also reduces its reliability.

The aim of the invention is to increase reliability.

The drawing is a schematic diagram.

The high-voltage thyratron switchboard contains the first capacitor 1, the second capacitor 2, the plates of which are connected to the anode of the first thyratron 3, the second plate of the capacitor 2 is connected through the primary winding of the first pulse transformer 4 with the plate of the third capacitor 5, the second plate of which is

ate

Turn through the primary winding of the second pulse transformer 6 is connected to the fourth capacitor 7 and the output of the switching element 8, to which the control bus 9 is also connected. The second terminal of the switching element 8 is connected to a common bus line, to which the second capacitor 7 plate is also connected, the second secondary winding terminal of the second pulse transformer 6 and the cathode of the second thyratron 10, and its anode is connected to the cathode of the first thyratron 3 transformer 4. The first terminals of the secondary windings of the pulse transformers 4 and 6 are connected to the nets of thyratrons 3 and 10, respectively.

As the switching element 8, controlled semiconductor and electronic elements can be used, for example, a thyristor, a transistor, an electronic lamp of a thyratron.

The submodule torus works as follows. In the initial state, all the capacitors 1, 2, 5 and 7 are charged from the source AND, and the voltage between the capacitors 2. 5 and 7 of the distributor is according to the value of their capacitance.

In this case, it is necessary to satisfy the condition that at the junction point of the anode of the thyratron 10 and the cathode of the thyratron 3, the voltage must be equal to I / 2. When a unlocking signal arrives on the control bus 10 to the switching element 8, it opens and discharges the lower capacitor 7. The first capacitor 1 then begins to charge the capacitors 2 and 5, and the charging current passes through the primary windings of the pulse transformers 4 and 6 will generate control pulses on the nets of thyratrons 3 and 10, which will open them. In the future, all capacitors will begin to discharge through the thyratrons 3, thereby

faster and more reliable unlocking of them, since the thyratron switch is usually installed in pulse modulators. working with a certain frequency, then

capacitors 1, 2, 5 and 7 will be charged with this frequency from source I. The magnitude of the voltage on the capacitor 7 is determined by the magnitude of the amplitude value of the control pulses. The duration of the control pulse is determined by the internal resistance of the grid-cathode of the thyratrons, given in the primary winding of the pulse transformer, taking into account its transformation ratio.

Claims (1)

The invention of the High-voltage thyratron switch containing the first thyratron, the anode of which is connected to the power bus, and the cathode connected to the anode of the second thyratron, the cathode of which is connected to the common bus and the first lead of the first capacitor, the second capacitor, the first lead of which is connected to the cathode of the first thyratron and the beginning the secondary winding of the pulse transformer, the third capacitor, characterized in that, in order to increase reliability, a switching element and an additional pulse transformer are introduced in it, the power bus through the third capacitor connected to the end of the primary winding of the pulse transformer, the beginning of which is connected to the first output of the second capacitor , the second output of which is connected to the beginning of the primary winding of an additional pulse transformer, the end of which is connected to the second output of the first end Satori, which is included in parallel 0 switching element, the beginning of the secondary winding of the additional pulse transformer is connected to the grid of the second thyratron, and the end of the second winding of the pulse transformer is connected to 5 to the grid of the first thyratron. HI &