SU1203690A1 - Device for controlling power source with rising frequency - Google Patents

Abstract

The invention relates to the field of electrical engineering and can be used in system protection devices of a parallel inverter - gas discharge load with a multitude of parallel-connected electrodes with fusible inserts, for example, a plasma-chemical reactor-ozone generator. The purpose of the invention is to reduce the mass and size characteristics by accomplishing the block 5 shutdown of a faulty electrode on trigger 7, logic elements 8 and 9, two one-oscillators 10 and 11, and logic elements 12 and 13. The device also contains a voltage control unit 1, a protection unit 2 , automatic reclosing unit 3, command block 4 and power supply 6. A possible embodiment of these blocks — their element-by-element composition — is provided in the specification. 1 il. i (Л С 1C о со а со со

Description

 - one

The invention relates to electrical engineering and can be used in protection devices of a parallel inverter system - gas discharge load with a plurality of parallel-connected electrodes with fusible inserts (for example, a plasma-chemical reactor — an ozone generator) during their operation.

The purpose of the invention is to reduce the overall dimensions.

The drawing shows an electrical schematic diagram of the device.

The control unit of the power supply of the increased frequency contains a voltage control unit 1, a protection unit 2, an automatic reclosing unit 3 (ARA), a command unit 4, a faulty electrode disconnecting unit 5 (ONE) and a power source 6,

Unit 5 ONE is made on the trigger 7 of the first 8 and second 9 And elements, the first 10 and second 11 single vibrators of the first 12 and second 13 OR elements, with the second element OR 13 connected to the first input of the second element And 9, the first input of the first element And 8 - with the third input of the first element OR 12, the output of the first element AND 8 with the counting input of the trigger 7, the direct and inverse outputs of which through the first and second one-vibrators, respectively, are connected to the first and second inputs of the first element OR 12, the output of which and the third input are according to It is the first output and the first input of the ONE unit 5, the second output of which is the output of the second element 9, and the second, third, fourth and fifth inputs are the first and second inputs of the second element 13, respectively, and the second, the inputs of the first 8 and second 9 Elements I. In this case, the first and second inputs and the first output of the ONE unit 5 are connected respectively to the first and second outputs and the first input of the voltage control unit 1, the second and third inputs and the third and fourth outputs of which are connected respectively to the first output of the power supply 6, to the first output unit ft- commands to the first input unit 3 and reclosure the first input protection unit 2, second and third inputs and first and second outputs which are respectively connected to a first output

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3 automatic reclosing, with the second output of power supply 6, second and third inputs of automatic reclosing unit 3, the second and third outputs of which are connected respectively to

g the third and fourth inputs of the ONE unit 5, the second output of the protection unit 2 is also connected to the first input of the command unit 4, the second output of which is connected to the fifth input of the ONE unit 5

10 and with the first and second inputs of the power supply source 6, the third input of which is connected to the second output of the ONE unit 5.

Block 1 control can be postji; For example, on the prohibition element 14 and the rectifier ISj, the output of which is connected to the inputs of the delay element 16 and the threshold element 17, the first and second and third inputs and the first, second, third and fourth outputs of the voltage control unit 1 are respectively input prohibition of prohibition element 14, entrance rectifier 15, second entrance

25 of the prohibition element 14, the output of the high - miter 15, the output of the threshold element 17, the output of the delay element 16 and the output of the prohibition element 14.

The protection unit 2 can be built on the threshold element 18, the output of which is connected to the S input of trigger 19, the first, second and third inputs and the first and second outputs of protection 2 being the second S input and R input of the trigger 19, the input of the threshold element 18, and the irregular and direct outputs of the trigger 19.

The AR unit 3 can be built on a delay element 20 and connected in series to the first RS flip-flop 21, the first element W 22, the second RS flip-flop 23, the second element W 24, the one-shot 25, the output of which is connected to the R-switch of the RS flip-flop 21, which is connected to the input of the delay element 20, the first, second and third inputs and the first, second and third outputs of the automatic reclosing unit 3 being the second input of the second element AND 24, the second input of the first element 22, respectively, the input of the first RS flip-flop 21 , output of delay element 20, inverse and direct output of the second R S-flip-flop 23.

Block 4 of the commands can be built on the button 26 of the Start and winding of the relay 27 connected in series, the contracts of which connect the R- and S-inputs of the RS flip-flop 28 to the source 29

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logical 1, direct output RS-3 er 28 is connected to the first input of prohibition element 30, the output of which is connected to the input of delay element 31, the first input and the first and second outputs of command block 4 are respectively the prohibition input of prohibition element 30, the output of 31 delay and the release of the element 30 of the ban.

The power supply 6 can be built on a pulse generator 32 two-phase and four-phase outputs of which are connected to a pulse shaper 33, the output of which is connected to a rectifier 34, the output of which is connected to the first input of a single-phase parallel current inverter 35, the second input of which is connected to control unit 35, and the output through the current sensor 37 is with a voltage transformer 38 and a load unit 39 with a plurality of fuse links connected in parallel, with the first, second and third inputs and the first and second outputs of the source 6 being powered and are respectively the input of the control unit 36, the first and second inputs of the pulse generator 32, the output of the voltage transformer 38 and the output of the current sensor 37.

The device works as follows.

Power source 6 is turned on by pressing the Start button 26. In this case, the relay 27 triggers, which connects the S-input of the trigger 28 to the source 29 of the logic 1 with its contact. As a result of switching the RS-trigger 28, a single signal from its direct output goes to the input of the prohibition element 30, and from its output (because on its other input there is no prohibition signal from the output of protection block 4) a single signal is fed to the input of blocks 32 and 36, thereby allowing the formation of rectifier control pulses and a single-phase parallel inverter, i.e. the inclusion of the power source 6. When the power supply 6 is turned on, the start button 26 on the shaper 33 receives six control pulses from the generator 32. Since there are single signals at both its inputs, the signal that removes the ban from the four-channel output goes to the input of the generator 32 s

the output of the second element And the block 5 ONE, to one input of which the signal comes from the output of the block of 4 commands, and to another input through the second e / | e5 ment OR 13 of the same block - from the inverse output of the RS flip-flop 23 of the ARF block 3. The delay element 31 of the block of 4 commands causes the occurrence of a single signal at the input of ban 14 of block 14. Thus, it is allowed to turn on the power supply according to the usual three-phase switching circuit of the rectifier in absences

5 an eerie voltage time at load 39 and, accordingly, a prohibition signal at the input of the prohibition element 14 in block 1. When the power supply 6 is turned on, the voltage from the load 39 through the voltage transformer 38 is fed to the input of the block 1, where it is converted into a rectifier 15, and from the output of the first element OR 12 (in block 5 ОНЭ) is fed to the input

5 prohibition of prohibition element 14 in block 1, prohibiting the appearance of a signal at its output.

When the breakdown of one of the p electrodes in the load 39 through the specified

The Q electrode flows the emergency current of the power source 6, the energy of which, however, in the parallel inverter circuit often does not burn out the fuse-link. In this case, the voltage at the load 39 and, respectively, at the input of block 1, disappears, and two signals arrive at the input of protection block 2 — from the output of block 1 and from the load current sensor 37. The presence of two signals at the input of the protection unit 2 increases the reliability of its operation and the speed of the protection system f.

The occurrence of a signal at the output of protection block 2 through a block of 4 commands imposes a prohibition on the formation of control pulses by rectifier 34 and inverter 35 in the power supply unit, and thereby turns off the power supply 6.

At the same time, the signal from the output of the protection unit 2 is fed to the input of the AR unit 3 and re-circulates its trigger 21- (the memory element of the emergency disconnection of the power supply 6) to a single state. In this case, the signal from the output of the trigger 21 does not pass through the AND 22 element associated with it.

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no signal at the other input of this element. :

After a certain time interval HHj determined by the delay element 20, the AR unit 3 clears the flip-flop 19 in the protection block 2 and the same ™, automatically re-turns on the power supply 6. Since in the source state on the inverse output of the trigger 19 in block 2 of protection 1-1 there is a logical 1 place (the signal of the station, which corresponds to a logical O on the main outputs of the triggers, 5 when the trigger is reset, 19 3 the protection unit 2 at its inverse output output Il, respectively, at the output of the first element 22 in the control unit 3, a single signal appears that switches the trigger 23 (memory element for switching on the power supply 6 from the automatic reclosing unit 3) to the state one, as a result what logical 1 goes to odi input of AND gate 24 of the block, as well as to one input of AND gate 8, the OSD unit 5.

When the power source 6 is automatically switched on again, the AR unit 3 is sent to the shaper 33 only pulses from the two-channel output of the block 32 are received, since there is no signal at its corresponding input that removes the ban from the four-channel output (there is no signal at the output of the OR 13 and accordingly, at one of the inputs of the element AND 2 of the block 5 ONE), the shaper 33 of the power supply 6 produces two pulses that go to one of the anodic and cathodic rectifier groups of the rectifier 34 "sub-. SUBSTANCE: rectifier 33 provides single-phase rectifying mode. Simultaneously with switching on rectifier according to single-phase circuit, inverter 35 starts and output of power supply 6 (load 39) causes voltage of alternating frequency. If, upon reaching a certain value sufficient to re-break the faulty electrode, the voltage at the load 39 disappears again, the circuit that prevents the power source 6 from turning off when the voltage drops to 0

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ke, which works as follows. When you turn on the source 6 power; from the AR unit 3 and the application of a voltage of increased frequency and the input of block 1, the rectified feedback voltage from the output of block 1 is fed to the inputs of block 2 and block 5 OH3j to the output of which trigger 7 is connected with a counting input. After the trigger, the signal is fed to the input of one of the single-shot 10, 11 (depending on the initial state of the trigger 7), which produce the same pulses, for a duration of 2 degrees, one period of 50 Hz, 3 Signals blocking the operation of block 1 and, correspondingly, 5 of block 2 are blocked. So it goes on until (so much half-period GD)., As a result of the flow of the emergency current through the fuse-plug into the chain of the faulty electrode, the latter will not burn and will not disconnect it from the common ozone generator circuit.

After this, at the next switching-on, the feedback voltage reaches the value at which threshold element 17 in block 1 is triggered, from the output of which the signal goes to the input of the element OR 13 of the block 5 of the ONE and to one of the inputs of the element 9, on which - sjTCH signal that removes the prohibition from the black channel output of block 32 of power supply 6. At the same time, at the output of the mold 32 of the same block, six control pulses appear and the rectifier 33 is switched to the three-phase rectifying mode, and the power source 6 to the nominal operating voltage.

After the occurrence of the feedback voltage in block 1 through the elements: t 16 delays, the signal arrives at one of the inputs of the AND 24 element in block 3 of the automatic reclosure and starts the one-shot 25. From the last output, the signal arrives at the R inputs of the flip-flops 23 and 21, By switching them back to the initial state, the memory of the emergency condition is cleared, the emergency switch and n 0 (the next automatic reclosing of the power supply and the device is ready for the next disconnection of the faulty electrode, if this happens.

The use of the proposed device in the ozonizer, containing

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An ozone generator with a multitude of parallel-connected electrodes with melting inserts and a high-frequency power source, consisting of a three-phase rectifier and a single-phase parallel inverter, will significantly simplify the operation of such installations.

formula of invention

15 20 25 30 eg

A higher frequency power source control unit containing a voltage control unit, a protection unit, an automatic reclosing unit, a command unit, a defective electrode shutdown unit, a power source, about and so that, in order to reduce weight and size characteristics, It disables the defective electrode unit is made on the trigger, the first and second elements AND, the first and second one-shot, the first and second elements OR, and the output of the second element OR is connected to the first input of the second element And, p The first input of the first element I is connected to the third input of the first element OR, the output of the first element I is connected to the counting input of the trigger, the direct and inverse outputs of which are connected to the first and second inputs of the first element OR, respectively, and respectively the third input of which is, respectively, the first output and the first input of the defective electrode disconnection unit, the second is V. Chizhikov Editor-I. Nikolaichuk Tehred T. Tulik CorrectorM, Demchik

Order 8429/60 Circulation 871 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch PPP Patent, Uzhgorod, st. Project, 4

Yu

036908

the output of which is the output of the second element I, and the second,

the third, fourth and fifth inputs - the first and second inputs of the second element OR, respectively; the second

the inputs of the first and second elements I, while the first second inputs and the first output of the disconnecting device of the faulty electrode are connected respectively to the first and second outputs and the first input of the voltage control unit, the second and third inputs and the third and fourth outputs of which are connected respectively to the first 15 the output of the power source, to the first output of the command block, to the first input of the auto-reclosing unit, to the first input of the protection unit, the second and third 20 inputs and the first and second outputs of which are connected It is connected to the first output of the automatic reclosing unit, to the second output of the power source, to the second 25 input of the automatic reclosing unit, to the third input of the automatic reclosing unit, the second and third outputs of which are connected respectively to the 30th and fourth entrances of the defective electrode shutdown unit, The second output of the protection unit is also connected to the first input of the command unit, the second output of which is connected to the fifth input of the unit for disconnecting the faulty electrode and to the first and second inputs A power source, the third input of which is connected to the second output of the defective electrode disconnecting unit.

Claims (1)

Claim A device for controlling a high-frequency power supply, comprising a voltage control unit, a protection unit, an automatic re-enable unit, a command unit, a disconnect unit for a faulty electrode, a power source, which, in order to reduce overall dimensions, contains a unit disconnecting the faulty electrode is performed on the trigger, the first and second elements AND, the first and second single vibrators, the first and second elements OR, and the output of the second element OR connected to the first input of the second element And, the first the first input of the first AND element is connected to the third input of the first OR element, the output of the first AND element is connected to the counting input of the trigger, the direct and inverse outputs of which are connected through the first and second single vibrators to the first and second inputs of the first OR element, the output and third input of which are respectively, the first output and the first input of the disconnecting unit of the faulty electrode, the second output of which is the output of the second element And, and the second, third, fourth and fifth inputs, respectively, the first and second the fifth input of the second OR element, the second inputs of the first and second AND elements, while the first and second inputs and the first output of the malfunctioning electrode disconnect unit are connected 10, respectively, to the first and second outputs and the first input of the voltage control unit, the second and third input and the third and fourth outputs of which are connected respectively 15 to the first output of the power source, to the first output of the command block, to the first input of the automatic restart block, to the first input of the protection block, the second and third 20 inputs and the first and second outputs of which are connected respectively to the first output of the automatic re-enable unit, to the second output of the power source, to the second 25 to the input of the automatic re-enable unit, to the third input of the automatic re-enable unit, the second and third outputs of which are connected respectively to 30 by the third and fourth inputs of the shutdown block of the faulty electrode, the second output of the protection block is also connected to the first input of the command block, the second output of which is connected to the fifth input _{35 of} the block of the shutdown of the faulty electrode and to the first and second inputs of the power supply, the third input of which is connected to the second output of the malfunctioning electrode trip block.