SU1287130A1 - Secondary electric power source - Google Patents

Abstract

The invention relates to secondary power sources of radio equipment and is complementary to the invention in a. No. 1117612. The aim of the invention is to expand the field of use of the power source by providing the possibility of reliable parallel operation with other sources. When the output parameters of the converter 1 deviate, the signals generated by the corresponding feedback circuits arrive at its control input. Element 17 is used to indicate the device in the voltage stabilization mode. Current stabilization mode is indicated by element 18. This provides local and remote monitoring of the health and load of each of the parallel operating sources. 1 il. tg (L

Description

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The invention relates to electrical engineering and is intended for use in the construction of secondary power supply systems with parallel connection of component feed channels.

The aim of the invention is to expand the field of practical use of the secondary power source by providing the possibility of reliable parallel operation with other sources.

The drawing shows the functional diagram of the proposed device,

The source includes an adjustable pulse transducer 1 voltage, an amplifier 2 signals for output voltage instability mode selection block 3, an amplifier 4 signals for current overloads, a hi-pulse modulator 5, a master oscillator 6, a comparator 7, 8 and 9 prohibition blocks, element 10 OR, block 11 of the galvanic isolation, peak detector 12, keys 13-16, elements 17 and 18 of the local indication, current limiting resistors 19 and 20, reverse inverter 21, scoring: -1y trigger 22, the current-generating node 23. By the position 24 in the diagram designation on the general information bus, and at positions 25 and 26, the output information conclusions of the source. The potential and current (direct current) outputs of the adjustable pulse converter 1 are connected to the inputs of the amplifier 2, the output voltage signal instability, and the amplifier 4 of the overload signal, respectively. Another potential (alternating current) output of the converter 1 is connected to the input of the galvanic isolation unit 11. The inputs of the block 3 mode and comparator 7 are connected to the inputs of the amplifier

2 signals of output voltage instability and amplifier 4 overcurrent signals. The inputs of the pulse-pulse modulator, 5 are connected to the outputs of the master oscillator b and the mode selection block 3, and the output with one of the inputs of the element 10 OR, The signal and control inputs of the prohibition block 8 are connected to the outputs of the master oscillator 6 and the comparator 7, respectively state S and output to another input element 10 OR. The output of the element 10 RITI I is connected to the input of the switching

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adjustable pulse converter 1 voltage. The input of the counting trigger 22 is connected to the output of the master oscillator 6. The control input of the prohibition unit 9 is connected to the output of the state comparator 7. The output of the galvanic isolation unit 11 is connected to the input of the peak detector 12. The counting trigger 22, the prohibition block 9, the current generating node 23 and the phase-inverse transformer 21 are connected in series. The keys 13 and 14 are connected between the common information bus 24 and the information output pins 25 and 26 of the source. The first output pin of the peak detector 12 is connected to the common information pin 24. The second output pin of the peak detector 12 is connected to the input potential pin of the key 13 through the series-connected element 17 local indication and current supply resistor 19, and to the input potential output of a key 14 through a series-connected element 18 local indication, a current limiting resistor 20 and parallel connected e keys 15 and 16 on the control inputs of the keys 15 and 16 are connected to the antiphase outputs fazoinversnogo transformer 21,

The source works in the following way.

Voltage and current at the output of the pulse voltage converter 1 are analyzed according to the amplifier 2 of the output voltage instability signal and s - 4 current overload signal

If the output current of converter 1 is less than the maximum permissible value, the mode selection unit 3 locks the output of the amplifier 4 overcurrent signal and connects the output of the amplifier 2 of the output voltage instability signal to the control input of the pulse-width modulator 5 At the same time the modulator 5 generates pulses of such a duration as is necessary for stabilization of the output voltage of the converter 1 at a given level. The converter 1 is controlled by width-modulated pulses through element 10 1 SHI, the frequency of the w "pulses of the frequency-impulse modulator 5 is determined by the frequency of the pulses of the master oscillator 6. The leading edge

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The width-modulated pulses are determined by the leading edge of the pulses of the master oscillator 6, the duration of which is chosen substantially less than the follow-up period. As a result of j comparing the output signals of the amplifiers 2 and 4, the state comparator 7 produces a voltage that enables the inhibitor block 8. The pulses of the master oscillator 6 are received at the second input O of the element 10 OR through the open block 8 of the ban. Since in the voltage stabilization mode the duration of the width-modulated pulses is always longer than the duration of the pulses driving the generator 6, the latter overlap in duration by the width-modulated pulses and do not affect their duration.

Latitudinal-modulated pulses from the 20 outputs of the power inverter of the converter 1 through the galvanic isolation unit 11 are fed to the input of the peak detector 12, the output of which produces a constant voltage. The value of a constant voltage is determined almost by the amplitude of the pulse-width modulated pulses and does not depend on their duty ratio.

Under the action of the output voltage 30 of the peak detector 12, the local indication element 17 is turned on and the key 13 is opened through the current-limiting resistor 19. The local indication element 17 and the closed key 35 13 between the output information output 25 and the common information bus 24 show the normal operation of the source. In the voltage stabilization operation, when the output current of the transformer-40 of the body 1 is less than the maximum permissible value, the signal of the element 17 is used as a local indication, and the key 13 is used as the information interface of the source with the control and monitoring equipment 45.

Counting trigger 22 converts a sequence of pulses with a high duty cycle, generated by master oscillator 6, into a sequence of pulses with a duty cycle equal to two. However, in the voltage stabilization mode, the prohibition block 9 is kept locked by the output voltage of the state comparator 7, and therefore the output pulses of the counting trigger 22 do not pass to the input of the phase-inverse transformer 21. The keys 15 and 16

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are kept locked, the local indication element 18 is turned off, the key 14 is locked.

If the output current of converter 1 reaches the maximum permissible value, the mode selection unit 3 locks the output of amplifier 2 of the output voltage instability signal and connects the output of amplifier 4 of the current overload signal to the control input of pulse-width modulator 5. With a further decrease in the source load resistance pulse width modulator 5 produces pulses of such duration as is necessary to limit (stabilize) at the maximum allowable level of the output current ate 1. At the output voltage of the transducer 1 is reduced, and the magnitude of the current is maintained at the maximum acceptable level. The state comparator 7, comparing the output signals of the amplifiers 2 and 4, produces a voltage locking the prohibition unit 8 and the unlocking prohibition unit 9.

In this mode, the pulses of the master oscillator 6 do not arrive at the second input of the element 10 OR, and the pulses with a duty cycle of two from the output of the counting trigger 22 are fed through the open block 9 and the current proofs node 23 to the input of the phase-inverse transformer 21. with a duty cycle of two, inverted relative to each other. The pulses of these inverted sequences alternately unlock the keys 15 and 16. At the same time, the output voltage of the peak detector 12 is also applied to the local indication element 18 and the control input of the key 14. The current flowing through the local indication element 18 and the control input of the key 14, is determined by the resistance of the current limiting resistor 20. The included local indication element 18 and the closed key 14 represent the operation of the source in the current stabilization mode. This mode of operation takes place at maximum load, when the output current of converter 1 reaches the maximum permissible value, or when the source is overloaded up to a short circuit at the output. The signal element 18 is used as a local indication, and the key 14 as the information interface of the source with the control and monitoring equipment.

The operation of the proposed source with parallel connection with similar sources to increase the output power and backup with

Due to the variation of the output voltage, the load current is unevenly distributed between the individual supply channels. The source for which the set output voltage turned out to be somewhat larger than the others is under full load in the mode of limiting the maximum allowable current. The source loading limit is indicated by the included local display elements 17 and 18 and the closed output information terminals 25 and 26 to the common information bus 24.

A SOURCE; in which the installed reliable parallel operation with other sources, a galvanic isolation unit, a peak detector, a counting trigger, an additional prohibition unit, a current-generating node are entered into it.}

30 phase-transformer transformer, two elements of local indication, two current-limiting resistors and four keys, and an adjustable switching voltage converter with an additional AC output, the input of the galvanic isolation unit connected to the additional output of the adjustable switching voltage converter, and an inverter with entrance

40 peak detector, counting trigger, additional inhibit bar, current-supply node and phase inverted transformer are connected in series, the counting trigger input is connected to the output

45 of the master oscillator, the first and second keys are connected between the common information bus and the corresponding output information 1 and the output w

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the output voltage turned out to be slightly lower than the others, it will be unloaded. For him, the voltage on you-. During the formed system, the com will be large, therefore, amplifying the 2 signals of the instability of the output voltage of this source produces a signal at which the duration of the width-modulated pulses decreases to zero. However, the narrow switching pulses from the master oscillator 6 continue to come to the switching input of the converter 1 through the open interdiction unit 8 and the OR element 10. At the same time, the power inverter of the pulse converter 1 generates pulses of minimum duration, which are detected by the peak detector 12. When there is voltage at the output of the peak detector 12, a local indication signal (local indication element 17) and a remote control signal (key 13) are produced, which indicate that This source has been fixed. In this case, the block 9 prohibition locked, the display element 18 is not included, the key 14 is locked.

ka, the first output pin of the PIKOBO detector is connected to the common information bus, the second output pin of the peak detector is connected to the input potential pin of the first key through the series-connected perk, the first output pin of the PIKOBOGO detector, is connected to the common information bus, the second output pin the peak detector is connected to the input potential output of the first key through a series-connected power converter

converter 1 does not produce any -55 element of the local indication and the first

what pulses, then at the output of the peak-current-limiting resistor, and to the input

detector 12, the voltage is zero for the potential of the second

and element 17 of the local indicator 1i, aklyucha through consistently included

also, the key 13 is turned off, indicating a malfunction of the source.

Thus, the proposed reference is characterized by an extended field of practical use. When building a power supply system based on the parallel connection of such sources,

local and remote operational control of the health and load of each source, i.e. it is possible to quantify the value of a healthy reserve and the reliability of the power supply system at a given moment.

Claims (1)

Invention Formula The source of the secondary power supply on auth.St. No. 1117612, about tl and h ayi with the fact that, in order to expand the field of practical use by providing opportunities ka, the first output pin of the PIKOBO detector is connected to the common information bus, the second output pin of the peak detector is connected to the input potential pin of the first key through the series connected per712871308 The second element of the local indication, the output of the state comparator, and the second current limiting resistor and the control inputs of the third and fourth connected in parallel third and fourth keys - with the antiphase true keys, the input input of the additional outputs of the phase-inverting prohibitive conversion unit connected with 5 mators.