SU847496A1 - Submodulator - Google Patents

Description

(54) SUB MODULATOR

one

The invention relates to a pulse technique and can be used in the circuits of pulse modulators intended for powering elementary particle accelerators, thermocouples and other electrophysical equipment.

The closest to the proposed technical entity is a submodulator containing a DC voltage source, charging resistors, a storage capacitor, a damping resistor, a switching thyristor, a recharge thyristor, a switching capacitor, a recharge choke, a main discharge thyristor, a voltage source - displacement and rectifying capacitor 1.

The disadvantage of this submodulator is the low reliability due to the high operating voltage on the submodule elements.

The purpose of the invention is to increase reliability by reducing the operating voltage on the submodule elements.

This goal is achieved by the fact that a first submodulator containing a source of direct voltage, to one of the poles of which, through the first charging resistor, is connected to the first plate of the storage capacitor, the second plate of which is connected to the common busbar and to the first output of the damping resistor, 5 The swarm of the output is connected to the anode of the switching thyristor and the cathode of the recharged thyristor, the anode of which is connected to the first plate of the switching capacitor through the recharging choke; torogo connected to the second terminal of resistor quench second .rezistor a charging provided between the first electrodes and the storage capacitor switching, the discharge main thyristor, whose anode is connected to one

f5 from the terminals of the recharge droplet, the bias voltage source, the output of which is shunted with a rectifying capacitor, an additional discharge thyristor, a diode and a current-limiting resistor are introduced, and the cathode of the main discharge

20 of the thyristor is connected to the anode of the additional discharge thyristor, the cathode of which is connected to the output of the submodule, which is connected to one of the plates of the rectifying capacitor through the current limiting resistor, and the second cover of the main discharge thyristor through the diode.

The drawing shows a schematic diagram of a submodule.

The submodulator contains a bias voltage source (not shown), a rectifying capacitor 1, a current limiting resistor 2, a main discharge thyristor 3, an additional discharge thyristor 4, a diode 5, charging resistors 6 and 7, a switching capacitor 8, switching thyristor 9, quenching resistor 10, recharge choke 11, recharge thyristor 12, storage capacitor 13 and a constant voltage source (not shown).

The submodule torus works as follows.

In the initial state, the switching thyristor 9, the recharge thyristor 12, the main and additional discharge thyristors 3 and 4 are locked. The modulator lamp 14 of the modulator 15 is locked on the grid by a voltage from a source of bias voltage. The storage capacitor 13 is charged through the charging resistor 6 to the voltage of the constant voltage source. The switching capacitor 8, through the charging resistor 7 and the extinguishing resistor 10, is charged to the value of the voltage on the storage capacitor 13.

The submodule is controlled by trigger pulses from an external generator (shown in the drawing). With the arrival of the first triggering pulse, a recharge thyristor 12 is switched on, closing the circuit of the resonant reloading of the switching capacitor 8. At the end of the reloading of the switching capacitor 8, the voltage applied to the anode of the switching thyristor 9 will reach twice the voltage of the constant voltage source. This completes the preparation of the submodule for the formation of the output pulse. Then, the second start trigger is supplied to the control electrodes of the main and additional discharge thyristors 3 and 4; the pulse is delayed relative to the first trigger pulse for the time required for the resonant recharge of the switching capacitor 8. As a result of switching on the main and additional discharge thyristors 3 and 4 An overvoltage is applied to the grid of the modulator lamp 14, equal to the value of the voltage on the storage capacitor 13. The storage capacitor 13 is discharged by the current of the grid of the modulator lamp Py 14 flowing through the main and additional bit thyristors 3 and 4.

The duration of the pulse being formed is determined by the delay time of the third trigger pulse, which arrives at the control electrode of the switching thyristor 9 relative to the second trigger pulse. As a result of switching on the switching thyristor 9 and discharging the switching capacitor 8 on the charging resistor 7, a negative polarity pulse is released, which turns off the main discharge thyristor 3. The diode 5 connected in series with the additional discharge thyristor 4 eliminates the influence of the source voltage displacement during the process of switching off the main discharge thyristor 3. Simultaneously with the disconnection of the main discharge thyristor 3, the additional discharge thyristor 4 is also turned off, so that Through the current limiting resistor 2 from the bias voltage source is less than the magnitude of the holding current of the additional discharge thyristor 4, and the Submodulator returns to its initial state.

The use of the invention makes it possible to simplify the circuit of the submodulator, reduce the magnitude of the operating voltage on its elements, and increase its reliability.

Claims (1)

Invention Formula A submodulator containing a constant voltage source, with one of the poles of which, through the first charging resistor, is connected to the first plate of the storage capacitor, the second plate of which is connected to the common thickness and to the first output of the damping resistor, the second output of which is connected to the anode of the switching thyristor and the cathode of the recharged thyristor, the anode of which through the recharged The choke is connected to the first plate of the switching capacitor, the second plate of which is connected to the second output of the damping resistor, the second charging resistor connected between the first plates of the storage capacitor and switching capacitor, the main discharge thyristor, the anode of which is connected to one of the terminals of the reset alternator, source bias voltage, the output of which is bypassed by a rectifying capacitor, characterized in that, in order to increase reliability by reducing the operating voltage on the elements under modulator, an additional discharge thyristor, a diode and a current-limiting resistor are inserted in it, the cathode of the main discharge thyristor is connected to the anode of an additional discharge thyristor, the cathode of which is connected to the output of the submodulator, which is connected through the current-limiting resistor one of the plates of the rectifying capacitor, the second of which is connected to the common busbar directly and to the cathode of the main discharge thyristor through diode. + Fuck Sources of information taken into account during the examination 1. Glazenko, T. A. Semiconductor DC converters. M., “Energie, 1973, p. 68, fig. 2-17a (prototype).