SU1262714A1 - Pulse interrupter - Google Patents

Abstract

The invention relates to a pulse technique and can be used to convert a constant voltage value. The purpose of the invention, the increase in speed, is achieved by applying a sufficient reverse voltage to the thyristor during the shutdown phase. For this, the second electrode of diode 9 is connected to the common connection point of diode 6 and throttles 7. The device also contains a thyristor 1, a load 2, poles 3 and 4 of a source 5 of constant voltage, a node 8 of a forced comm circuit containing in series (L connected a capacitor 10 and a choke 11. An embodiment of the node 8 into which a diode and a thyristor are inserted.

Description

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given in the specification. . The throttle 11 is not applied to the thyristor 1; the working voltage across the capacitor 10 does not enter the circuit. Therefore, the recharging of the capacitor, therefore, 2 or more.

1262714

one

The invention relates to a pulse technique and can be used to convert a constant voltage value.

The aim of the invention is to increase the speed by applying a sufficient reverse voltage to the thyristor during the shutdown phase.

In Figures 1 and 2, the circuit diagrams of possible device implementations are presented.

The pulse interrupter contains a thyristor 1 connected in series with a load 2 between poles 3 and 4 of a source 5 of constant voltage.

The first diode 5 is connected in series with the choke 7 between the terminals of the load 2 in the opposite direction with respect to the sources 5. Parallel to the thyristor 1, the node 8 is forced to ((CH switch). the second diode 9 in the opposite direction with respect to the source 5.

Node 8 may be implemented in the form of a series-connected capacitor 10 and throttle 11 (fig.O or using, in addition to the capacitor 10 and throttle 11, additional thyristor 12 and diode 13,

The circuit breaker of FIG. 1 is one-step and operates as follows.

In the initial state, the thyristor 1 is turned off, the capacitor 10 is charged with the polarity of Fig. 1, all the elements of the interrupter are de-energized. When the thyristor 1 is turned on, the capacitor 10 is recharged through the choke 11 and the thyristor 11 to the reverse polarity voltage, after which a working recharge occurs along the circuit: capacitor 10, choke 11, choke 7, diode 9, capacitor 10. thyristor 1 is de-energized

and a reverse voltage equal to that of the voltage of the capacitor 10 is applied to it, which accelerates the process of turning off the thyristor 1, the fraction of the voltage acting on the thyristor 1 is determined by the ratio of inductances of chokes 7 and 11.

After the thyristor is turned off, 1 polarity of the voltage across the capacitor

10 will correspond to that shown in FIG. 1, and the load current 2 closes through the diode 6 and the choke 7. In this case, the direction of the switching currents and the load in the choke 7 is opposite, which ensures its magnetization reversal.

The interrupter of FIG. 2 is dual operation and operates as follows.

When the thyristor 1 is turned on, the load 2 is energized by the source 5. When the thyristor 12 is turned on, a preparatory recharge of the capacitor 10 takes place through the choke

11 and the thyristor 12. Immediately after the completion of the preparatory recharge, the working recharge of the capacitor 10 along the circuit begins: capacitor 10, diode 13, choke 7, diode 9, capacitor 10.

Since the choke 11 does not enter the circuit of the working recharge, the full voltage of the capacitor 10 is applied to the thyristor 1.

Claims (1)

Formula of Invention A pulse interrupter containing a thyristor connected in series with the load between the poles of a constant voltage source, the first diode connected in series with the choke between the terminals of the load in the opposite direction with respect to a constant voltage source, a forced switching node, connected to a thyristor, and A second diode connected in the opposite direction with respect to a constant voltage source and connected by a first electrode to a thyristor connection point and a constant voltage source, characterized in that, in order to improve speed, the second electrode of the second diode is connected to the connection point of the first diode and drossel. FIG. g