SU1206763A1 - Multichannel electric power supply system with uniformed current distribution - Google Patents

Abstract

The invention makes it possible to improve the accuracy of the current distribution, as well as to expand the field of application of a multichannel system and increase its efficiency. The system contains at least two stabilizers connected in parallel, each of which consists of a series-connected regulating element and an individual current sensor (DIT), the first adder (C), one of the inputs of which is connected to the output of the DIT, the second C, one input connected to the circuit voltage feedback, and a third C, the inputs of which are connected to the outputs of the second C and the reference voltage block, and the output to the control input of the regulating element. The system has a maximum current detection unit (BMT) and a stabilizer underload selector (SNS), the inputs of the BMT are connected to the outputs of the DIT. All stabilizers except this one are connected to the second input of the first C, the output of which is connected to the second input S. 1 Il. (I nd oh od od 00

Description

one

The invention relates to electrical engineering and can be used to supply various computing devices, automation and communications.

The purpose of the invention is to improve the current distribution accuracy, expand the scope of application and increase the efficiency of the power supply system.

The drawing shows the functional diagram of the system. The system contains N primary power sources 1, each of which is connected to one or more voltage regulators 2 With regulating elements 3, sensors 4 individual currents, adders 5-7, block 8 of the reference voltage, block 9 for determining the maximum current, selector 10 stabilizer underload and load 11.

Voltage stabilizers 2 can be either continuous or pulsed. As 4 current sensors, both current transformer sensors and resistive shunts with appropriate amplifiers can be used. The selector 10 underload passes to the second input of the second sum. A .tor signal about the underload of the stabilizer and does not pass the signal of its overload. Thus, the current feedback will affect the control signal only when the stabilizer is underloaded.

The role of the underload selector can be performed by a diode, its polarity must be reversed.

The power supply system operates as follows.

In the steady state, the load current is distributed in some way between the voltage regulators. The main parameters of the voltage on the load were determined by an ots stabilizer having a maximum current, which is thus very 10

1206763, 2

The first adders 5 stabilizers, having a smaller current, measure the difference between the currents of their own and the leading stabilizer. An error signal corresponding to the underload of this stabilizer appears at their output. This signal through the underload selector is fed to the input of the second adder 6, where it is added to the feedback signal for the voltage and causes a voltage change at the output of the third adder 7 so as to eliminate the current deviation from the maximum. Each LED (5 stabilizer will tend to repeat the amount of current flowing in the master stabilizer. At the same time, due to the redistribution of currents, the current level in the master stabilizer will decrease. mainly current loop gain.

When a circuit breaker fails or one or several stabilizers are disconnected, the load current is redistributed between the operating stabilizers. One of them becomes

20

25

35

40

45

thirty

lead

and the rest are slaves.

The voltage parameters at the load are determined by the new leading stabilizer, and the slave stabilizers act as current-boosting ones.

Thus, in comparison with the known, in this power supply system, the accuracy of the current distribution between voltage regulators increases when all the stabilizers work together, since there are no underloaded channels, the range of voltage increases, and the efficiency increases. installed in the common return of the system.

Claims (1)

Invention Formula At the output of the first summation. "I the ghost In ra 5 of the master stabilizer, there is an overload signal for this stabilizer. This signal, however, due to the writing of the underload selector, does not enter the input of the second adder and does not affect the control signal. The leading stabilizer thus stabilizes the voltage across the load. lead and the rest are slaves. The voltage parameters at the load are determined by the new leading stabilizer, and the slave stabilizers act as current-boosting ones. Thus, in comparison with the known, in this power supply system, the accuracy of the current distribution between voltage regulators increases when all the stabilizers work together, since there are no underloaded channels, the range of voltage increases, and the efficiency increases. installed in the common return of the system. Invention Formula A multichannel power supply system with uniform current distribution, containing in each of the N parallel supply channels one or at least two parallel connected to each other and with outputs for connecting the load of a constant voltage regulator, 31 but the connected regulating element and the individual current sensor, the first adder, one of the inputs of which is connected to the output of the individual current sensor, the second adder, one input connected to the feedback feedback circuit, and the third adder, whose inputs are connected to the outputs of the second adder and a reference voltage block, and an output to a control input of a regulating element, characterized in that, in order to increase the accuracy of the current distribution. 06763 expanding the area of its application and increasing efficiency, each stabilizer has a maximum current detection unit and an underload selector 5 stabilizer, the inputs of the maximum current detection unit are connected to the outputs of the individual current sensors of all stabilizers except this one, the output of the maximum current detector connected to the second input of the first adder, the output of which through the selector underload of the stabilizer is connected to the second input of the second adder.