RU1831736C - Unit for storage battery control used in buffer regime - Google Patents

Abstract

Usage: in power supply systems of loads from an automated rectifier operating in a buffer with a rechargeable battery. SUMMARY OF THE INVENTION: the device consists of a rechargeable battery, an automatic generator, and a controlled rectifier, two shunts, a comparison unit, two counters, two differentiating circuits, a generator and an RS-flip-flop. The comparison unit is made in the form of two differential amplifiers and a comparator. The outputs of the shunts are connected to the inputs of the respective differential amplifiers and are respectively the inputs of the device for inclusion in the load circuit before and after the battery. The device monitors and signals the situation of an open battery and prohibits the increase in the output voltage of the rectifier. 1 ill. CO C

Description

The invention relates to electrical engineering, and can be applied, in particular, in automation and communication devices, where an automated rectifier operating in a buffer with a battery is designed for uninterrupted power supply to the load.

The aim of the invention is to enhance the functionality.

The invention is illustrated in the drawing, which shows a diagram of the claimed device.

A device for monitoring the operation of the battery 1 included in the buffer with an automated charge rectifier 2 consists of the first 3 and second 4

shunts, block 5 made in the form of a comparator with an offset of 6 and two differential amplifiers 7 and 8, the first 9 and second 10 counters, two differentiating circuits 11 and 12. pulse generator 13 and RS-trigger 14,

The outputs of the first shunt 3 are connected to the inputs of the first differential amplifier. The outputs of the second shunt 4 are connected to the inputs of the second differential amplifier 8. The outputs of the differential amplifiers 7 and 8 are connected respectively to the non-inverting and inverting inputs of the comparator b. The output of the comparator 6 is connected to the input of the installation R of the first

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a counter 9, the counter input CE of which is connected to the n-bit output Qn of the second counter 10. The counter input CE of the second counter 10 is connected to the output of the square-wave generator 13. The output of the 1st bit QI of the second counter 10 is connected via a differentiating circuit 12 to the installation input R of the RS-flip-flop 14, the input of the installation S of which is connected through a differentiating circuit 11 to the output of the 1st bit of the first counter 9. M-bit. the output of the first counter 9 is connected to the blocking input C of the same counter and to the input of the fault alarm unit. The direct output of the RS flip-flop 14 is the control output of the device connected to the input of the automated charge rectifier 2.

The device monitors the operation of battery 1 due to the fact that, at an increased output voltage of rectifier 2, the current of rectifier passing through shunt 3 is greater than the load current passing through shunt 4 by the amount of charge current of battery 1, DNN . The voltages taken from shunts 3 and 4 are increased respectively by differential amplifiers 7 and 8 and are supplied respectively to the non-inverting and inverting inputs of comparator 6. Since the current through shunt 3 is greater than the current through shunt 4, the voltage at the non-inverting input of comparator 6 is greater than Nepr. - on the inverting input of the same comparator, which gives a signal to the installation input R of the first counter 9, which prohibits the counting of pulses from the n-bit output Qn of the second counter 10, At the n-bit output Qn of the second counter 10 Battery failure does not appear.

When the battery 1 is cut off and the output voltage of rectifier 2 is increased, the currents in shunts 3 and 4 are equal, from the output of comparator 6 a zero signal is fed to the installation input R of the first counter 9, which allows pulse counting. After counting, by the first counter 9, a certain number of pulses at the n-bit output Qn, a signal appears in the battery failure alarm unit.

In dynamics, the device operates as follows.

In the mode of constant charging of the battery, the charging current of the battery is small, the currents in shunts 3 and 4 are practically equal, and at the output of the comparator 6 there is a zero potential, allowing the counter 9 to read the pulses supplied to its counting input CE from the n-bit output Qn of counter 10. Counter 10 is pulsed

generator 13. After each pair of pulses from the n-bit output Qn of counter 10, counter 9 generates a signal from the 1st bit output Qi through a differentiating circuit

11 to the input of the installation in 1 S of the RS-flip-flop 14. From the direct output of the RS-flip-flop, a signal is fed to the input of the automated charge rectifier 2 to increase its output voltage. By increasing

the output voltage of the rectifier 2 increases the current through the battery 1 and the current difference between the current of the rectifier 2 I V and the load current n becomes greater than the specified value D and

comparator 6 gives a signal 1 to the input of the installation О R of counter 9, which prohibits the supply of pulses from the n-bit output Qn of the second counter fO, and resets the first counter 9. Turns off the signal directly

the output of the RS flip-flop 14 occurs by applying a pulse from the 1st bit output Qi of the second counter 10 through the differentiating circuit 12 to the installation input to the O (R) RS-flip; Hera 14.

in the event of an open battery I, the rectifier current is equal to the load current. The current is that Г1-1н 0 is less than the specified value Д |, therefore, the comparator 6 removes the zero signal from the input of the installation to О R

counter 9.

The signals from the n-bit output Qn of the second counter 10 are fed to the counting input CE of the first counter 9. After each pair of pulses from the n-bit output Qn of the second counter 10, the first counter 9 gives a signal from the 1st bit output Qi through the differentiating circuit 11 to the input of the installation in 1 S of the RS-flip-flop 14. C. of the direct output of the RS-flip-flop 14. From the direct output

The RS flip-flop 14 supplies a signal to the control device of the rectifier 2 to increase its output voltage, but since battery battery t is absent, then the rectifier current 2 b is equal to the load current

} n and the comparator b remains in the previous state. The signal from the direct output of the RS flip-flop 14 is turned off by applying a pulse from the 1st bit output Qi of the second counter 10 through the differential

circuit 12 to the input of the installation in the O R RS-trigger 14.

After the first counter calculates 9p / 2 pulses from its n-bit output Qn, a signal is input to the input of the malfunction alarm unit and through the blocking input C the signal blocks the first counter 9. After that, the pulse supply through the differentiating circuit 11th input is stopped

setting in the IS S-flip-flop 14 and the test increase in the output voltage of rectifier 2 stops.

Thus, the proposed device allows controlling the damage (open) of the battery when it is operated in a buffer with an automated rectifier having a small variable voltage component at the output.

Claims (1)

SUMMARY OF THE INVENTION A device for monitoring the operation of a battery operating in a buffer mode, comprising an automated charge rectifier and an alarm unit, characterized in that that, in order to expand the functionality, it is equipped with two shunts, two counters, two The first and second shunts are connected to the inputs of the corresponding differential amplifiers and are respectively the inputs of the device for inclusion in the circuit 5 loads before and after the battery, and the outputs of the first and second differential amplifiers are connected respectively to the non-inverting and inverting inputs of the comparator, the output 10 of which is connected to the installation input of the first counter, the n-bit output and the lock input of the latter are combined and connected to the input of the alarm unit, the generator output is connected to the count input of the second counter, the n-bit output of which is connected to the count input of the first counter , and the first bit outputs of the first and second counters are connected through the corresponding differentiating circuits differentiating circuits, RS-trigger-20, respectively, with the inputs of the installation in 1 and rum, generator and comparator, RS-flip-flop, the direct output of which is filled in the form of two differential controls by the input of the auto-amplifiers and a comparator, while the output rectifier. The first and second shunts are connected to the inputs of the corresponding differential amplifiers and are respectively the inputs of the device for inclusion in the circuit loads before and after the battery, and the outputs of the first and second differential amplifiers are connected respectively to the non-inverting and inverting inputs of the comparator, the output which is connected to the installation input of the first counter, the n-bit output and the blocking input of the latter are combined and connected to the input of the alarm unit, the generator output is connected to the counting input of the second counter, the n-bit output of which is connected to the counting input of the first counter, and the first bit outputs of the first and second counters are connected via corresponding differentiating circuits 2nd with hrtchik trigger Q ABOUT $ alarm unit