RU1805535C - Charger for capacitive energy storage device - Google Patents

Abstract

Use: when creating power supplies for solid-state lasers. SUMMARY OF THE INVENTION: the device comprises cascade-connected power supply 1, voltage converter 2, oscillatory circuit 3 and output transformer, to the secondary windings of which are connected rectifiers loaded on a storage capacitor. A thyristor is connected between the output diagonals of the rectifiers, and diodes are connected between their outputs of the same name. This embodiment of the device allowed to reduce the transit time of the initial section, where doubling of the charge current is achieved without changing the parameters of the oscillatory circuit. 3 ill.

Description

The invention relates to pulsed technology, in particular to devices for charging capacitive energy storage devices, and can be used to create power supplies for solid-state lasers.

The purpose of the invention is to increase the efficiency and reliability of the device.

The drawing shows a functional diagram of a charging device: Fig. 2 is one embodiment of a control circuit; Fig. 3 shows voltage plots.

The device contains cascade-connected power supply 1, converter 2, oscillatory circuit LC-circuit З, transformer 4 with primary and two secondary windings, the first rectifier

5. connected to one secondary winding of transformer 4 and a second rectifier

6. connected to another secondary winding of the transformer L. thyristor 7. connected by the cathode to the negative terminal of the first rectifier B and the anode to the positive pitode rectifier 6. the first diode 8 connected by the cathode to the positive terminal of the first rectifier 5 and the anode to the positive terminal of rectifier 6, the second diode 9, connected by the cathode to the negative terminal of rectifier 5 and the anode to the negative terminal of rectifier 6, the storage capacitor 10, connected by one plate to the positive terminal of rectifier 5, and d ugoy a facing to the negative terminal of the rectifier 6. In parallel, the storage capacitor 10 is included a voltage sensor 11, coupled via a control circuit with a control input of the inverter 2 and the control electrode of thyristor 7.

When the power source 1. is turned on, voltage converter 2 starts to work, the LC oscillating circuit Z sets the current value of the primary winding of transformer 4, the currents of the secondary windings of transformer 4. passed rectifiers 5 and 6 and connected diodes 8 and 9.

ate with

00

oh eaten

GJ SP

are summed in the storage capacitor 10.

As the voltage at the storage capacitor 10 increases, the fraction of reactive energy of the oscillatory circuit 3 drops to zero at the moment when

isp «и2 и6-е- / 2а (1)

where JCn is the reduced voltage of the storage capacitor;

1) b-voltage of power supply 11;

U2 is the voltage of the secondary winding of the transformer 4, reduced to the primary winding;

Q - quality factor of the oscillatory LC-circuit 3

At this point, the control circuit 12 generates a positive pulse supplied to the control electrode of the thyristor 7, while the diodes 8 and 9 are under reverse voltage and the current through them is stopped, and the rectifiers 5 and 6 are turned on in series. The charging current is reduced by half, and then the charging process continues to the output voltage value of the storage capacitor 10, after which the control circuit 12 generates an inhibit signal for the voltage converter 2.

The control circuit 12 may be implemented, for example, according to the functional diagram shown in Fig. 2. The signal from the voltage sensor 11 is fed to the inputs of the comparators 13 and 14, the reference voltages Uo.ni and U0n2 are respectively supplied to the other inputs of the comparator 8.

The threshold of comparator 13 is selected from condition (1); in this case, the shaper 15 generates a pulse arriving at the control electrode of the thyristor 7. The threshold of operation of the comparator 14 determines the voltage of the storage capacitor, when the comparator 14 is triggered, a level O is transmitted to the converter 2, which prohibits its operation. The voltage sensor 11 can be made in the form of a voltage divider.

Claims (1)

Thus, without changing the parameters of the oscillatory LC circuit, a doubling of the charge current in the initial section is achieved, which increases the overall efficiency of the device. SUMMARY OF THE INVENTION A capacitive energy storage device comprising a cascade-connected power supply, a converter voltages with a series LC oscillating circuit and a step-up step-up transformer connected in series with two identical secondary windings, one of which is connected the first bridge rectifier, and the other, the second bridge rectifier, a storage capacitor connected by one plate to the positive terminal of the first rectifier, and the other plate to the negative terminal of the second rectifier, characterized in that, in order to increase the efficiency, it additionally introduced a thyristor connected by a cathode to the negative terminal of the first rectus mitel, and the anode - to the positive conclusion of the second rectum, the first and. the second diodes, the cathodes of which are connected, respectively, with the positive and negative terminals of the second rectifier, and also a voltage sensor connected in parallel to the storage capacitor, the output of which is connected via the additionally entered control circuit to the control input of the converter voltage and thyristor control electrode. F.2 average Uynp pread ftz. 3