SU1300444A1 - Pulse d.c.voltage stabilizer - Google Patents

Abstract

The invention relates to secondary power sources of radio equipment. The aim of the invention is to increase the reliability and efficiency of a DC voltage regulator. The goal is achieved by recuperating the residual energy of additional droplets 7 into the load and the energy stored in the capacitor 6, as well as by reducing the power allocated to it in the key element during its activation. For this purpose, the drossel 7 and diode 8 of the capacitor 11 are connected to the diode 9 and 10 to the common one. 1 Il. (L 4; NU 4

Description

The invention relates to electrical engineering and can be used in secondary power sources of radio electronic equipment, in DC voltage regulators.

The aim of the invention is to improve the reliability and efficiency of the stabilizer.

The drawing shows a pulse voltage regulator circuit.

A DC voltage regulator contains key element 1 and storage choke 2 connected in series to the first power bus. The output terminals of the stabilizer are bridged by capacitor 3 and connected to the input of control unit 4 whose output is connected to the control input of key element 1. Series connected the first discharge diode 5 and the first capacitor 6, as well as the series-connected additional choke 7 and the second discharge diode 8 are connected between the common, the point of the key element 1 with the n A secondary throttle m. 2 and a second power bus. Series diodes

9 and 10 are connected parallel / first to the first capacitor 6, and their middle point is connected through the second capacitor I 1 to the common, the point of additional throttle 7 and the second discharge diode 8.

The switching voltage regulator operates as follows.

When the key element is closed, current 1 flows through this key, choke 2, through the load and the common bus of the stabilizer. Diodes 5, 8 and 9 are closed. At the same time, the current flows through the key element 1, additional choke 7, capacitor II, charge diode 10, capacitor

6 and a common stabilizer bar. Due to the energy stored by the choke 7, konde} (-sulator 6 is charged before the voltage of the power source. Since the inductance of the throttle is

7 and the capacitors 11 and 6 are chosen small enough, then the process of charging the capacitors ends when the key element 1 is closed, and the charge diode

10 is closed. When the key element 1 is opened, first only diode 5 opens, through which capacitor 6 is discharged into the load, diode 8 is closed by the voltage of charged capacitor I 1, which in turn begins to discharge through diode 9, additional choke 7 and choke 2 filter to load. Since the current through the choke 2 of the LC filter is approximately constant and at a given time is provided by the accumulated energy of capacitors 6 and 11, the key

Compiled by Yu. Opadchiy

Editor .m. BanduraTe.hred I. VeresKorrektor I. L1uska

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VNIIPI State Committee of the USSR USSR pi de .; 1am inventions and discoveries

1 13035, A locKBa, Ж --35. Rauiyuka iab .. d. 4/5 Production and printing company, Uzhgorod, sea level Design. element I is turned off, practically no switching of the load current due to the fact that the discharge time of capacitors is selected 1.2-1.5 times longer than the turn-off time of the key element 1.

As the capacitors 6 and 11 discharge, the current through the inductor 7 and, therefore, through the diode 8 increases. Since the current of the throttle 2 is approximately constant, the current of the diode 5 decreases accordingly and

At the instant of discharge of the capacitor 6, the diode 5 is fully closed. Current drossel. 7, thus, becomes equal to the current of the choke 2. At the next short circuit of the key element 1, a reverse voltage is applied to the diode 5. However, diode 5 is already

completely closed. A supply voltage is applied to choke 7, and the choke voltage begins to decrease. The diode 8 is closed and, since the choke 7 is connected in series with it, this is not accompanied by a catchy current of greater magnitude. The proposed device has a higher efficiency, since there is practically no loss in the key element when it is opened, and the residual energy of additional drossel and capacitors is used in the load, rather than dissipated in shunt resistors, as in the prototype device.

Claims (1)

Invention Formula 0Pulse constant stabilizer voltages, a key element and a cumulative choke, a filter capacitor connected to the output terminals of the stabilizer, parallel to which the T1 block is connected to the output element of the key element, connected in series to the power bus; the first discharge diode and the first capacitor are connected in series between Q is the common point of the key; | element and accumulative throttle and the second power bus, connected in series an additional choke and a second discharge diode, connected in parallel with the first discharge diode and the first capacitor, 5 characterized in that. With a goal of improving reliability and efficiency, two diodes and a second capacitor are introduced, the first capacitor being shunted by two series-connected diodes connected in the same direction as the first discharge 0 a diode, and the point of the inserted diodes is connected to the common point of the additional choke and the second discharge diode through the second capacitor.