SU1304125A1 - Device for automatic activation of backup power supply to using equipment - Google Patents

Abstract

The invention relates to e; ECG from the computer, in particular to the device. Power supply of the communication equipment. The purpose of the short-circuit (1brether --- ensuring automatic restoration of the power supply circuits I disconnected by the device is consumed, first reduced load current of the backup source 2. In the normal operating mode at the same time, from the main source of the unit switching, the connection to the HC.MV of the entire load is achieved. From the signal B1 -.) turns of ON: 1: S) to L1. 1 and I) a signal is issued to the inputs of block 6. consumer With the disappearance of nanr / kenn of the main source I b. Yuk 4 switch osi1stvlyaet and keynote pitam.and g eze: P1 ;;;: -; ; g .-,) h; ---; :. MpCBbJHii ini T (v com LOAD / K: p; / :; ci i; iOi O source 2 DOIH Stimogo LiL Im-P I output the operating vc, i I: .vJi: b ;;; li CPS); yyipaii. ieHH /. uo V ;; ь: ho:;. and block 6 of the choice and tampering (, coss; to uyutism (his least 1 consumer 0 among those connected to ric-lrrp; iOMv; and; TOCH1P1Ku 2, ISSUED SIG By part ic. l ; after O; 1 l1On1 on iel-iee of an important bit.h. the load current of the backup network-nyka 2 decreases inadequate on the B1 input of the AND element, 1 is signaled, but noisy through the b. control input from (one: estbook) go to com.mutating element; 0. 0 o. (-totozygs | .eio for; yda-; And si - / evil. c. ic-, its io Prior1H; H: OTjie ( ) i;; 0.1I io vex; iOp, butt MonuiOCTb |; a1 :) OSI: e; B ix - cases. The device will automatically re-enable the disconnected disconnected. And; sat down -ITOM T) to se rpvaKu and {) cha., ichi |). however, n; -gregggel 6t: i.iee is important1L1 ;. than what -. 1, because of the power of | 11ix in a single cut;) ;: 101 o source and at the same time the current H1) for. the value of the device in the case of the | T is less important. 1b. 2 and .; . WITH Fig

Description

The invention relates to electrical engineering, in particular to power supply equipment of communication equipment.

The aim of the invention is to provide automatic restoration of the power supply circuits of the devices disconnected by the device while reducing the load current of the backup source.

On fpg. Figure 1 shows a block diagram of a device for automatically introducing backup power to consumers; in fig. 2 - functional block diagram of the device.

The device contains main 1 and reserve 2 power sources, voltage control unit 3, switching unit 4, load control unit 5, consumer selection (priority) block 6, blocking element 7, analysis block 8, recovery block 9, switching elements 10 and consumer eleven.

The voltage monitoring unit 3 is designed to monitor the voltage of the main source 1 and generate a control signal for the switching unit 4.

Switching unit 4 is designed to switch the power of consumers 1 1 from the main source to the backup one by a signal from the control unit 4 for supply voltage and voltage from the backup source 2 to units 7, 8 and 9 of the device.

As blocks 3 and 4, the corresponding units of commercially available power supply switch-on (AVR) automatic devices are used. Switching unit 4 is supplemented with one pair of closing contacts (additional switching circuit), which provides the supply of voltage from the backup source to blocks 7-9.

The load control unit 5 is designed to control the magnitude of the load current of the backup source 2 and to form a signal analysis unit 8, the voltage of which is proportional to the value of the monitored current.

The blocking element 7 is designed to block the outputs of the consumer selection unit 6 in the power mode of consumers from the main source 1.

The analysis unit 8 is designed to determine the current difference between the allowable and actual load current values of the backup source 2, compare the resulting difference with the current values of each consumer and generate control signals for the consumer selection unit 6 and the recovery unit 9 (the functional diagram of the analysis unit 8 is shown in FIG. 2).

The analysis unit 8 contains the threshold voltage shaping circuit 12, the blocking element 13 and the operational amplifiers 14 and 15.

Scheme 12 provides for the formation of voltages proportional to the specified load current value of the backup source 2 and the currents of each consumer, and at the same time the output of these voltages on separate outputs. Formation circuit 12 is a voltage stabilizer, powered from backup source 2, and a voltage divider connected to it, on precision resistors. The output voltages of the circuits 12 are adjustable and are set based on the specific characteristics of the consumers for their current consumption.

The blocking element 13 is similar

with blocking element 7.

Operational amplifier 14 provides a comparison of a voltage proportional to a given (allowable) value of the load current of the backup source 2 and coming from the output of the circuit 12 with the voltage

0 proportional to the actual value of this current and coming from the output of block 5 load control. As a result of comparing these voltages, the output signal is output at the first output (to the second inputs of the operational amplifiers 15i -15p), if

 the load current of the backup source 2. is less than that, or on the second output (to the input of the consumer selection block b), if the load current of the backup source 2 is more than acceptable.

- Operational Amplifiers 15 | - 15no6ecne comparing the voltage proportional to the difference between the allowable and actual load currents of the backup source 2 and the output of the operational amplifier 14, with the voltage

2 proportional to the current of the corresponding consumer. As a result, a comparison of these voltages produces an output signal at the first output of the operational amplifier 15, if the current of the given consumer is less than the difference between the permissible and the actual

0 by the load current of the backup source 2, or by the second output, if the current of this consumer exceeds the specified difference. The consumer selection unit 6 is designed to monitor the state of the switching elements 10 (on, off), determine the least important consumer among those connected to the backup source 2 and generate a signal transmitted through the blocking element 7 through the switching circuit to the control input of its corresponding switching element 10 (a variant of the functional diagram of the consumer selection block 6 is shown in FIG. 2). The consumer selection block 6 contains AND elements 16, triggers 17 and inverters 18. The outputs of elements AND 16, which are outputs of block 6, are unequal and enumerated. In order of increasing importance (priority) of the user. Accordingly, the elements AND 16, the triggers 17 and the inverters 18 form m groups (bits). The first bit (AND element 16i, trigger 17i, inverter 18 |) is the youngest and corresponds to the least important consumer.

The recovery block 9 is designed to memorize the numbers of the switching elements 10 that were disconnected by the device when switching to the backup power supply of the consumers (setting the specified load current value of the backup source 2), determining the most important consumer among those disconnected by the device, the inclusion of which at the moment will not cause the preset value the load current of the backup source 2, as well as for the formation and output of a signal transmitted through the switch circuit to the control Yush, its input switching element 10 (a variant of the functional scheme of the recovery unit 9 is shown in Fig. 2).

Recovery unit 9 contains an inverter 19, elements OR 20, triggers 21, elements AND 22 and 23, elements OR 24, elements AND 25, and key elements 26. The outputs of elements AND 25, which are outputs of the restoration block 9, are unequal and numbered diminishing the importance of the consumer. Accordingly, the elements OR 20 and 24, the triggers 21, the elements AND 22, 23 and 25, and the key elements 26 form n groups (bits). The first bit (the element OR 20i, the trigger 21i, the element AND 25i, the key element 26i) is the eldest and corresponds to the most important consumer. In the second category there are no elements And 22 and 23.

The device works as follows.

In normal operation, when powering consumers from the main source 1, the switching unit 4 ensures that the entire load is connected to it. The signal output of the switching unit 4 to the control input of the blocking element 7 is not output, and the blocking element 7 disconnects the outputs of the consumer selection unit 6 from the disconnecting circuits of the switching elements 10 and the inputs of the recovery unit 9. The absence of a signal from the output of the switching unit 4 at the second input of the analysis unit 8 causes the blocking element 13 to turn off the outputs of the formation circuit 12 from the operational amplifiers 14 and 15. The outputs of the analysis unit 8 to the consumer selection unit 6 and the recovery unit 9 do not receive signals . In recovery block 9, a signal appears at the output of the inverter 19, according to which the flip-flops 21 are reset to the initial zero state.

During the operation of the device, from the signal outputs of the switching elements 10 to the inputs of the consumer selection block 6, control signals are issued from those switching elements 10 that are 5

five

with the on state. These signals are fed to the inputs of the inverters 18 and the single inputs of the flip-flops 17, which are located in the bits corresponding to the given switching elements. The output of the signal from the outputs of said inverters 18 to the zero input of the respective triggers 17, which as a result are transferred to one state, is stopped. At the single output of trigger 17,

The signal arriving at the input of the AND 16 element, which is in the same bit, and from the inverse output of this trigger 17, connected to the inputs of the AND 16 elements of all higher than the given bits, ceases to produce a signal. As a result, the disabling of signals for switching of the switching elements 10 from the outputs of the elements AND 16 star bits is prohibited. Thus, the switch-off signal of the YUnitsy element 10 can be issued (if there is a signal from the output of the operational amplifier 14) from the output of the TOi o element AND 16, the inputs of which have signals from the inverse outputs of all the trigger 17, found at lower ranks compared to this (less important consumers are not included).

When the source of the main source 1 disappears or its inadmissible decrease, the voltage control unit 3 generates a signal according to which the switching unit 4 switches the consumer from the main source to the reserve source. At the same time, from an additional pair of closing contacts (at the additional switching value) of block 4 to the control inputs of the key elements of the blocking a. Ie-7 is energized. In the output, the outputs of the consumer selection block 6 are connected to the disconnecting circuits of the switching elements 10 and to the inputs of the recovery block 9. The same voltage entering the analysis block 8 on the control inputs

The 0 key elements of the blocking element 13 unlocks the outputs of the threshold voltage generating circuit 12. The threshold voltages produced by the circuit 12 arrive at the first inputs of the operational amplifiers 14 and 15. The second input of the operational amplifier 14 from the output of the load control unit 5 receives a signal with a voltage proportional to the load current of the backup source 2. If the voltage of this signal the higher the threshold, which corresponds to the current exceeding the load of the backup source 2, the permissible value, then the output of the operational amplifier 14 connected to the inputs of the elements 16 of the consumer selection block 6 is a signal governing

5 to which a signal is output from the output of the consumer selection unit 6 corresponding to the least important consumer among those connected to the backup SOURCE 2. This sig0

0

Cash is transmitted through the blocking element.

7 along the trip circuit to the control input of the corresponding switching element 10, which triggers the trip and disconnects the power supply circuit of the consumer connected to it from the backup source 2. The signal output of this switching element 10 stops the signal to the corresponding input of the consumer selection unit 6. At the output of the inverter 18 connected to this input, a signal appears that transfers the trigger 17, which is in this position, to the initial zero state. As a result, from the inverse output of the specified trigger 17, a signal is output to the inputs of the AND 16 elements of all higher ones compared to this bit. The signals at all inputs of AND 16, except for the operational amplifier 14 connected to the output, appear only at the level that corresponds to the least important 2 consumers connected to the backup source.

If, after disconnecting the least important consumer, the load current of the backup source 2 is not sufficiently reduced (a signal from the output of the operational amplifier 14 to the elements 16 continues to flow), then the output of the indicated element 16 of the switch 16 appears through the blocking circuit 7 the control input of the corresponding switching element 10, which is triggered on disconnection and disconnects the power supply circuit of the consumer connected to it from the backup source 2. From the signal output of this switching element 10 to the corresponding input of the consumer selection block 6 ceases to receive a signal.

8, block 6 is being prepared to provide a disconnect signal for the next priority consumer.

This process continues until the load power of the backup source 2 is within the specified limits. In the future, the device automatically excludes the possibility of re-enabling the disconnected consumer, if the load current of the backup source 2 exceeds the specified value. If the consumer is turned on, more important than any of the current backup source, and the load current exceeds the specified value, the device shuts down the consumer, which is less important than switched on, which maintains the load current of the backup source 2 within the specified limits.

The signal supplied by the switching unit 4 when switching power consumers from the main source 1 to the backup 2, also comes in the recovery unit 9 to the input of the inverter 19. The output signal from the output of the inverter 19 stops and it goes 5

Restores to flow through the elements OR 20 to the zero inputs of the triggers 21.

The trip signals of the switching elements 10, given by the block 6 selection

the consumer, in the process of establishing the setpoint of the load current of the backup source 2, passes through the blocking element 7, enters the inputs of the recovery unit 9 and triggers the flip-flops 21 connected to these inputs, transfer

them in a single state. At the single outputs of the flip-flops 21, to the inputs of which the indicated signals arrived, there appear signals arriving at the input of the And 25 element of the corresponding bit. Thus, in block 9 of recovery, the numbers of the switching elements 10 are memorized, which were turned off by the device during the transition to backup power for consumers 11. In the first (older) section of the recovery block 9, when the trigger 20i is transferred

0, the signal from the single output of this trigger goes to the single state, in addition, to the control input of the key element 26i and opens it. If the load current of backup source 2 decreases and becomes less than permissible, then on one of

 the outputs of operational amplifiers 15 appear. The information input of the key element 26 ,, connected to the first output of the operational amplifier 15 |. If the current of the consumer corresponding to this bit is less than the difference between the allowable and actual load currents of the backup source 2, then at the first output of the operational amplifier 15i a signal appears that, having passed through the open key element 26i, is fed to the second input

, element And 25i. If the consumer corresponding to the given discharge has been disconnected by the device, then PA 25 | there is already a signal from the single output of the trigger 21i. As a result, a signal appears at the output of the AND 25i element, which enters the switch-on circuit to the control input of the corresponding switching element 10, which then triggers the switch-on. In this way, the power supply circuit of the most important consumer disconnected by the device during the transition to the backup power supply is restored. The signal from the output of the element And 25i, in addition, has passed through the element OR 20 |, is fed to the numeric input of the trigger 211 and translates it into the initial zero state. WITH

-inverse trigger output 211, a signal is output to the first input of the element OR 24, the first input of the element AND 22e, and the corresponding inputs of the elements AND 22 of all the other low-order bits. This signal passes through the element OR 249 and

5 opens the key element 2b2. The second input element OR 242 is connected to the second output of the operational amplifier 15 ;. The signal at this input of the element OR 242 floor 0

five

If the current exceeds the first consumer, the difference between the allowable and actual load currents of the backup source 2. Thus, the key element 2b2 opens when the consumer corresponding to the first discharge of the recovery unit 9 has not been switched off by the device when switching to the backup power supply or when can be switched on at the moment, since this will cause an overload of the backup source 2. When the 2b2 element is open, the signal from the output of the And 252 element can be issued only if the consumer is 11, s Resp this bit do reduction unit 9 otklyuchals device when switching to a backup power supply, i.e., in the presence of a signal from a single trigger output 212. Similarly, a signal to restore the power supply circuit of any other less important consumer can be issued under the following conditions: the more important consumers were not switched off by the device when switching to backup power supply (to all inputs of the corresponding element And 22 signals are received from the inverted outputs of the flip-flops 21, which are in the higher bits) or more important consumers cannot be connected to the backup source 2 under the overload condition (all inputs have uyuschego AND gate 23 receives signals output from the second operational amplifier 15); When the first condition is fulfilled, trigger 21, which is in a discharge corresponding to a given consumer, is transferred to a single state, i.e. This consumer was switched off by the device when switching to backup power supply (a signal from the single output of the trigger 21 appears at the corresponding input of the element AND 25 of this bit).

Claims (1)

Invention Formula A device for automatic input of backup power supply to consumers, comprising a voltage supply control unit connected in series at the output of the main source, a switching unit and a blocking element, a load control unit included in the backup source circuit, switching elements in the power supply circuit of each consumer, and a consumer selection unit, inputs which are connected to the signal outputs of the switching elements, and the outputs through the blocking element are connected to the disconnecting circuits of the switching elements, characterized in that, in order to ensure automatic restoration of the power supply circuits of the consumers disconnected by the device while reducing the load current of the backup source, a recovery unit and an analysis unit are inserted into it, with the analysis unit 0 five 0 0 five Q 5 contains a threshold voltage shaping circuit, a blocking element and operational amplifiers, the first inputs of which are connected to the inputs of the formation circuit through a blocking element, the control input of which is connected to the signal output of the switching unit, the second input of the first operational amplification is connected to the output of the load control unit, the first the output of the first operational amplifier is connected to the second inputs of the remaining n operational amplifiers, the outputs of which are connected to the inputs of the recovery unit, and the second output The first operational amplifier is connected to the input of the consumer selection unit, and the recovery unit contains the AND, OR elements, key elements and triples combined into n bits, and an inverter, the first most significant bit containing the OR element, trigger, and And element. The second bit contains the bottom of the OR element, the trigger, the AND element and the key element, the subsequent bits each contain two OR elements, a trigger, three AND elements and a key element, with a single trigger input through each blocking element with the corresponding to this bit output of the consumer selection block, the zero input of the trigger is connected to the output of the first element OR, the first input of which is connected to the first inputs of the first elements I.PI of other bits and connected to the output of the inverter whose input is connected to the signal output of the switching unit , a single trigger output is connected to the first input of the third element I, the second input of which is connected to the output of the key element, the information input of which is connected to the first output of the corresponding bit for an operational amplifier, the control input of the key element is connected to the single output of the trigger in the first bit, and in the remaining n-1) bits it is connected to the output of the second OR element, the first input of which is connected to the second output of the operational the amplifier corresponding to the first bit, and the second input is connected to the zero output of the trigger in the first bit, the first input of the second element OR in the remaining (n-2) bits is connected to the output of the second element And, the inputs of which are connected to the second outputs of the operational amplifiers the higher-than-current bits correspond to the bits, and the second input of the second element I, PI is connected to the output of the first element I, whose inputs are connected to the zero outputs of the triggers higher than the given one, bits, and the output of the third element And in all categories dakh is connected to the second input of the first OR element and is connected to the switching circuit of the corresponding switching element. Sostani PL, V. Sidorov Editor L. Veselovska Tehred I. Wee :) eCorrector L. Demch11K Order 1320/54 Draw b 19 Iolpienoe VNIIPI) of the CA Leningrad Regional Committee of the Leningrad Oblast on deeds of the issue; discovery and discoveries 1 13035, Moscow. G 35. Raushsk nab.,,. 4; 5 Pr01K vodet1imI () - polygraphic 11redp |) and t11e. Uzhgorod, st. I IpoeKTiisju. t