SU1246074A1 - Stabilized power source with output which is symmetric with respect to common bus - Google Patents

Abstract

The invention relates to the field of stabilized power sources. The aim of the invention is to improve the accuracy of stabilizing the current of a stabilized power supply with a balanced output with respect to the common bus. The goal is achieved by the fact that in steady state the load current flows from the + 6 source (L 1C 1 O) o-h

Description

1 through the first regulating element 3, the load current sensor 5, the load 11, the current resistor 12, the second regulating element 4 to the source 2. The voltage of the sensor 5, proportional to the load current, is compared in the comparison unit 7 with the reference voltage of the source 6. When a voltage signal appears from the output

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The invention relates to electrical engineering, in particular, to DC stabilizers, and can be used as a secondary source of power for various devices, including strain gauges.

The purpose of the invention is to increase the accuracy of current stabilization.

The schematic shows a stabilized power supply circuit.

The stabilized power supply contains two voltage sources 1 and 2 supply voltage, the first 3 and the second 4 control elements, the load current sensor 5, the voltage source 6, the first reference node 7, the voltage divider made on resistors 8 and 9, a second comparison node JO, a load 11 and a current resistor 12.

The stabilizer works as follows.

In the steady-state mode, the load current flows from the supply voltage source 1, through the first regulating element 3, the load current sensor 5, the load 11, the current resistor 12, the second regulating element 4 to the source voltage 2. The voltage of sensor 5, proportional to the load current, is compared by node 7 with the reference voltage of the source. Nick 6. When a deviation signal appears, the voltage of node 7 acts on the regulating element so as to reduce this deviation. The magnitude of the load current is determined by the resistance of the sensor 5 and the reference voltage of the source 6. The current passing through

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node 7 acts on the regulating element so as to reduce this deviation. The magnitude of the load current is determined by the resistance of the sensor 5 and the reference voltage of the source - 6. The current passing through the sensor 5 is equal to the load current 11, therefore, a high accuracy of current maintenance in the load is achieved. 1 il.

The sensor 5 is almost equal to the load current 11; therefore, a high accuracy of current maintenance in the load is achieved, which is determined by the sensitivity of the comparison node 7.

The reference voltage for the comparison node 10 is the common bus voltage, which is compared to the midpoint voltage of the divider. If the resistance of the resistors 8 and 9 is equal, the voltage divider at the output of the regulating element 4 is maintained at the same voltage at the output of the regulating element 3. The resistor 12 with a resistance equal to the resistance of the sensor 5 allows to compensate for the voltage drop across the sensor 5 and thereby maintain load voltage three 11.

The technical and economic advantages of the proposed DC stabilizer, when used as a source of secondary power supply for strain gauges in dynamic strain gauging as compared to the known current stabilizer, are manifested in increasing the measurement accuracy by 0.5% due to an increase in the accuracy of current stabilization.

Claims (1)

: Invention Formula A stabilized power supply with a balanced common output bus, containing two control elements, two comparison nodes, a reference voltage source, a main current sensor, an output voltage divider, a pair of terminals for connecting the load, and two pairs of switches for connecting different sources 12026074 NICs of constant voltage, in which one of each pair is intended to be connected to the azopolar poles of the two power sources, is connected to the power j input of the corresponding regulating element, and the other two voltages, intended to be connected to other opposite polarities of the indicated power sources, are combined and connected to a common bus, with the power outputs of the regulating elements connected to the terminals for connecting the load, the output voltage divider connected between power outputs of regulating elements and output connected to one of the inputs of the first node the comparison, the other input of which is connected to the common bus, and the output - to the simplest one. from the channel for that Compiled by S. Sitko Editor N. Tupitsa Tekhred E. Chizhmar Proofreader L. Pilipenko 3999/41 Circulation 836. Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Razshska nab. 4/5 Production and printing company} Uzhgorod, st. Project, 4 equalizing input of the first regulating element, the output of the second comparison node is connected to the control input of the second regulating element, and one of its inputs - to a source of reference voltage, characterized in that, in order to improve the accuracy of current stabilization, an additional sensor is introduced into it current, the resistance of which is equal to the resistance of the main current sensor, while both current sensors are included in opposite source buses between the output power terminals of the regulating elements and the terminals for connecting the load, and the second input of the second comparison node is connected to the connection point of the main current sensor with an output for connecting the load.