SU1654965A1 - Device for storage capacitor charging - Google Patents

Abstract

The invention relates to a pulse technique. The purpose of the invention is to improve the specific mass and size parameters of the device by increasing the power factor and the output voltage when the storage capacitor is discharged to an external load. The device contains two input terminals for connecting an alternating current source, positive and negative output terminals for connecting to a storage capacitor, two buoyer capacitors, each of which is at least an order of magnitude greater than the capacity of the storage capacitor, one of which is connected to one input terminal, valve circuit of two series-according to connected diodes, the connection point of which is connected to another input terminal, charge thyristor connected by a cathode with positive output terminal, line choke and thyristor control voltage control unit it. New in the invention is the additional supply of a linear choke with a tap from the midpoint of its winding, three lockable thyristors, a negative output terminal, and a second storage capacitor. 1 il. about 8 (L with

Description

The invention relates to a pulse technique and relates to devices for the fast charging of storage capacitors, periodically discharged into an external load at the frequency of an alternating current source of limited power and intended to supply pulse power consumers.

The aim of the invention is to improve the specific mass and size parameters of the device by increasing the power factor and the output voltage when the storage capacitor is discharged to an external load.

The drawing shows a diagram of the proposed device.

The device for charging the storage capacitor contains two input terminals 1 and 2 for connecting an alternating current source 3 of limited power, a positive 4 and a negative 5 output terminals for connecting to a charged storage capacitor 6, two buffer capacitors & U1

Sator 7 and 8, the capacity of each of which is at least an order of magnitude greater than the capacity of storage capacitor 6, one plate of which is connected to one input terminal 1, valve circuit of two series-according to connected diodes 9 and 10, charge thyristor 11 connected by a cathode to a positive output terminal 4, a block 12 for monitoring and controlling thyristors, current-limiting resistors 13 and 14, three additional lockable thyristors 15-17, additional negative Output terminal 18 and a second storage condenser Ator 19 is connected between terminals 5 and 18; terminals 2 5 are connected. Block 12 is connected with input and output terminals, buffer and second storage capacitors directly or through voltage dividers and with control transitions of charging and three additional Lockable thyristors and can be performed by any of the known circuits. The load resistance is switched between terminals 4 and 18 via a switching element, for example, a controlled discharge.

The device has the following connections between the elements. The thyristor 11 is connected to another plate of the capacitor 7 and the cathode of the thyristor 16, the anode of which is connected to the cathode of the diode 9 of the valve chain. The thyristor 15 is connected between terminal 18 of the anode to it and the other plate of the capacitor 8 and the anode of the thyristor 17, the cathode of which is connected to the anode of the diode 10 of the valve circuit. Resistor 13 shunts thyristor 16, and resistor 14 thyristor 17. In this case, the second storage capacitor is charged to a voltage of approximately 1.9 U, where Um is the amplitude of the voltage of the alternating current source of limited power.

The device as a reactive current-limiting elements contains resistors 13 and 14 with taps from the midpoint of the windings.

The capacity of the second storage capacitor 19 is recommended to choose about 1.1 times the capacity of the first storage capacitor 6.

In the proposed device, the AC source 3 is advantageously used without interruption over all

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period (qru 1 duty cycle) and its power factor & rty 1 pc 1 at the maximum output voltage approaching 4Um.

Thanks to the first stage of a slow primary charge of buffer capacitors 7 and 8, the proposed charging device can be supplied with almost no current surges from an AC source of limited power.

Claims (1)

Apparatus of the Invention A device for charging a storage capacitor, comprising two input terminals for connecting an alternating current source, an additional and negative output terminals for connecting to a charging storage capacitor, two buffer capacitors, each of which is at least an order of magnitude greater than the capacity of the storage capacitor and which are connected by their own plates with one input terminal, a valve chain of two diodes connected in series-according, a common point cat connected to a different input terminal, a charge thyristor connected between the other plate of the first buffer capacitor and an input terminal, and a thyristor voltage control and control unit connected to the input and output terminals and a control thyristor junction, characterized in that in order to improve the specific mass and size parameters of the device by increasing the power factor and the output voltage when the storage capacitor is discharged to an external load, it is additionally equipped with a linear others Cselem withdrawing from the midpoint of the winding, three thyristors, a negative output terminal and a second storage capacitor connected between the negative and additional negative output terminals; connected to one end of the winding of the linear throttle and the cathode of the first diode of the valve chain, the first additional lockable thyristor is connected between one co Tzom obmot51 ki additional linear throttle and additional negative output terminal of the anode to the latter, the third additional lockable thyristor - between the removal from the middle point of the winding of the additional linear throttle connected to the other plate of the second buffer capacitor and the other end of the winding cathode Lastly, the charge thyristor is connected with the anode to the other end of the line throttle winding, the negative output terminal is connected to the point of the diodes connecting the valve5496 56 the thyristor voltage monitoring and control unit is connected to the plates of the buffer and second storage capacitors and to the control transitions of the additional air thyristors, and the load resistance is connected between the positive and the additional negative output terminals switching element, and the parameters of the charge circuits of the first and second storage capacitors are chosen so that their own frequency j was equal to the frequency of the alternating current source voltage variation.