SU1311001A1 - High-voltage current pulse generator - Google Patents

Abstract

The invention relates to high-voltage pulsed technology and can be used in the electrical industry to create electro-physical installations designed to test high-current elements of electrical circuits, to study the behavior of materials in a strong magnetic field, magnetic accumulation. The purpose of the invention, the protection of thyristors in case of multiple short circuits x, is achieved due to the fact that the inductance of the driver is designed as the primary winding of the transformer. The generator contains the same drivers, each of which contains capacitors I and 10, input buses 2 and 3, load 4, thyristors 5 and 9, inductance 6, designed as the primary winding of transformer 8, control unit 7, inductance 11. At the same time the chains of the primary and secondary windings are chosen equal. 1 il. yes n (l oa

Description

The invention relates to electrical engineering, namely, high-voltage impulse technology, and can be used in the electrical engineering to create electrophysical devices designed primarily to test high-current elements of electrical circuits (cables, contacts, apparatuses and buses), to study the behavior of materials in a strong magnetic field. magnetic cumulation.

The purpose of the invention is to write thyristors during multiple short circuits,

The drawing shows an electrical schematic diagram of the device. The high voltage current pulse generator contains the same driver, each driver contains a capacitor 1, the first plate of which is connected to the first input bus 2 of the driver, and the second plate with the second input bus 3 of the driver, with a common power supply bus and the first load terminal 4, another output which is connected to the cathode of the thyristor 5, the anode of which is connected to the first terminal of the first inductance 6, the second terminal of which is connected to the first plate of the capacitor 1, the control electrode of the thyristor 5 with dinene with the first output of the control unit 7, the inductance 6 of the driver is designed as the primary winding of the transformer 8, the first output of the secondary winding of which is connected to the anode of the second thyristor 9, the control electrode, whose electrode is connected to the second input of the control unit 7, the cathode of the second thyristor 9 under, - to the first plate of the second capacitor 10, the second plate of which is connected to the first terminal of the second inductance 11, the second terminal of which is connected to the second water of the secondary winding of the transformer 8, and the constant first The primary and secondary windings are equal.

The generator works as follows.

In the normal mode, during the time interval from t to t, the voltage is applied to the first input bus 2 of the driver. The capacitors 1 and 10 are charged before the voltage UQ.B, the time t / s of the control unit 7, is supplied with a control pulse. The thyristor 5 is opened, the discharge of the capacitor 1 to the load 4 occurs through the primary winding of the transformer 8 and. the capacitor 10 to the second inductance 11 through the secondary winding of the transformer 8.

Sequential connection of the transformer B primary winding into the discharge circuit does not introduce any distortions in the operation of the generator in the operating mode, does not affect the growth rate and the operating current, since the EMF is induced at the primary windings of the transformer 8 bits. The generator current is compensated by the EMF induced by the operating current 5 flowing in the circuit consisting of the secondary winding of the transformer 8, the capacitor 10, the thyristor 9 and the second inductance 11, i.e. 4.6. tr.rs O, which is performed at a certain 0 selection of the parameters of the contour.

The 5th condition is the equality of the current i flowing in the load 4, the current 2S flowing in the inductance 1 1 multiplied by the transformer ratio of the transformer 8. The second condition is the equality of the periods in the generator circuit and the protective inductance 11, which also can be accomplished by selecting the inductance parameters 11 accordingly. In the event of a short circuit, the EMF induced in the transformer windings by the B short-circuit current of the generator 5 and the current of the circuit consisting of orichnoy winding of the transformer 8, the thyristor 9, the capacitor 10 and inductor 11. The parameters of the transformer 8 0 are chosen such that the slew rate and amplitude of the short circuit current in the oscillator circuit is not pre- prevshgali pusti1F1h values for a given class of SCRs. This condition is met for 45 s if the inductance of the primary winding of the transformer 8 is chosen to be not less than the inductance of the load 4.

Thus, in the proposed generator of high-voltage pulses, the current of the stitched thyristor switches is carried out with reusable short-circuits in any part of the generator under any load, instead of two types of protective circuits in the generator of a 55-amp circuit, which protects the thyristor switches from any types of short circuits, at the same time appearing simpler, cheaper, more reliable, proposed in the prototype.

formula and

3

3 o

13

bratis

A high-voltage current pulse generator containing the same driver, each driver contains a capacitor, the first plate of which is connected to the first input bus of the driver, and the second plate with the second input bus of the driver, with a common bus power supply and the first load terminal, the other output of which is connected to the thyristor cathode, the anode of which is connected to the first terminal of the first inductance; the second terminal of which is connected to the first capacitor plate, the control electrode of the thyristor is connected to the first output of the control unit. Editor M. Bandura Order 1901/54

Compiled by V. Chizhikov

Tehred I.Popovich Proofreader M.Demchik

Circulation 902 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35 ,. Raushska nab., D.4 / 5

Production and printing company, Uzhgorod, Projecto st., 4,

- g / o f5 4

y u

and and with that

In order to protect the thyristors during multiple short circuits, the inductance of the driver is designed as the primary winding of the transformer, the first output of the secondary winding of which is connected to the anode of the second thyristor, the control electrode of which is connected to the second input of the control unit , the cathode of the second thyristor is connected to the first plate of the second capacitor, the second plate of which is connected to the first terminal of the second inductance, the second terminal of which is connected to the second terminal of the transformer secondary winding Ator, wherein the permanent circuit primary and secondary windings are equal.

Claims (1)

Claim A generator of high-voltage current pulses containing identical shapers, each shaper containing a capacitor, the first lining of which is connected to the first input bus of the shaper, and the second lining with the second input bus of the shaper, with a common bus of the power supply 10 and the first output of the load, the other terminal of which is connected to thyristor cathode, the anode of which is connected to the first terminal of the first inductance; the second terminal of which is connected 15 to the first capacitor plate, the thyristor control electrode is connected to the first output of the control unit 01 4, characterized in that, in order to protect the thyristors during repeated short circuits, the inductance of the driver is made as the primary winding of the transformer, the first output of the secondary winding of which is connected to the anode of the second thyristor, the control electrode of which is connected to the second input of the control unit, the cathode of the second the thyristor is connected to the first plate of the second capacitor, the second plate of which is connected to the first terminal of the second inductance, the second OUTPUT of which is connected to the second terminal of the secondary winding t transformer, and the constant circuits of the primary and secondary windings are equal.