SU809468A1

SU809468A1 - Reversible rectifier control device

Info

Publication number: SU809468A1
Application number: SU792724696A
Authority: SU
Inventors: Алексей Иванович Суханов
Original assignee: Предприятие П/Я М-5644
Priority date: 1979-02-16
Filing date: 1979-02-16
Publication date: 1981-02-28

Description

1one

Изобретение относитс к электротехнике , в частности к устройствам управлени реверсивными выпр мител ми , и может использоватьс в реверсивных агрегатах, осуществл ющих автоматическое реверсирование тока в нагрузке по истечении заданного времени.The invention relates to electrical engineering, in particular, to control devices for reversing rectifiers, and can be used in reversing units that automatically reverse current in the load after a predetermined time.

Известно устройство, содержащее два реле, два элемента задержки, два усилител мощности, триггер и дв ждущих мультивибратора, к выходу каждого из которых подключено по одному из входов триггера, у которого первый выход подключен к входу ждущего мультивибратора к входу первого усилител мощности, а второй выход к входу первого ждущего мультивибратора и входу второго усилител мощности . К выходу каждого из усилителей мощности через элемент задержки подключено по одному реле, контакты которого подключены к системе управлени тириЬтОрами выпр мител 1.A device containing two relays, two delay elements, two power amplifiers, a trigger and two multivibrators are waiting, the output of each of which is connected to one of the trigger inputs, in which the first output is connected to the input of the standby multivibrator to the input of the first power amplifier, and the second output to the input of the first standby multivibrator and the input of the second power amplifier. A single relay is connected to the output of each of the power amplifiers through a delay element, the contacts of which are connected to the control system of the rectifier type 1 LEDs.

Однако указанное устройство задает врем работы пр мых и обратных тиристоров реверсивного выпр мител длительностью До 240 св зи с чем задающие RC-цепочки в ждущих мультиБиораторах имеют очень большую посто нную времени, из-за чего низка стабильность выд.ержек времени, задаваемых управл ющим устройством.However, this device sets the operating time of direct and reverse thyristors of a reverse rectifier with a duration of up to 240 connections with which the setting RC chains in the waiting multiBiorators have a very long time constant, because of which the stability of the output time delay set by the control device is low .

Наиболее близким по технической сущности и достагаемому результату к предлагаемому вл етс устройство, содержащее два генератора импульсов с регулируемой частотой, основные.и промежуточные усилители мощности, The closest in technical essence and available result to the proposed is a device containing two pulse generators with adjustable frequency, main. And intermediate power amplifiers,

0 элементы задержки, элементы ИЛИ-НЕ, триггер, переключатели и счетчики импульсов, имеющие установочный вход и N выходов. К выходу каждого из генераторов импульсов подключено по 0 delay elements, OR-NOT elements, trigger, switches and impulse counters having a setup input and N outputs. To the output of each of the pulse generators connected by

5 одному счетчику импульсов, выходы одного из которых подключены через переключатель к первому входу триг- гера, а выходы другого - к второму входу триггера через другой переклю0 чатель. К первому выходу триггера через последовательно соединенный промежуточный усилитель мощности, элемент задержки и элемент ИЛИ-НЕ подключен первый усилитель мощности, 5 to one pulse counter, the outputs of one of which are connected via a switch to the first input of the trigger, and the outputs of the other to the second input of the trigger through another switch. To the first output of the trigger through a serially connected intermediate power amplifier, a delay element and an OR element, the first power amplifier is NOT connected,

Claims

5 and to the second output - the second power amplifier through other series-connected intermediate power amplifier, a back-up element and an element-OR-NOT. The output of the first power amplifier podklk} Chong to the installation input of the second Pulse counter and to the thyristor control system of the rectifier, and the output of the second power amplifier to the installation input of the first pulse counter and to the rectifier thyristor control system. However, in this device, the efficiency of using the applied generators and pulse counters is low, since during the operation of one of the pulse counters, the other counter is inhibited and does not perform its functions. In addition, due to two generators and pulse counters, two intermediate power amplifiers, and OR-NOT elements, this device has a rather complicated circuit and a rather high cost. The purpose of the invention is to simplify the design of the device. The goal is achieved by the fact that a device containing a pulse generator with a variable resistor connected to a pulse counter, the output of which through the first switch is connected to the first input of a trigger, to the second input of which a second switch is connected, two delay elements and two amplifiers, is equipped with an I- element. NOT, two relays, the pulse generator - the second variable resistor, and the pulse counter - additional outputs, each trigger output connected via the corresponding delay and effort elements A relay is connected to the inputs of the amplifier, the output of which is connected to the installation input of a pulse counter, the additional outputs of which are connected to the inputs of the second switch. The drawing shows the electrical circuit diagram of the proposed device. The control unit contains a generator of 1 pulses, to the output of which the input of the counter of 2 pulses is connected, one part of the outputs of which through switch 3, and the other part through switch 4 are connected respectively to the first and second inputs of the trigger 5. To each of the outputs of the trigger 5 through elements 6 and 7 delays are connected to amplifiers 8 and 9, to the output of each of which is connected one relay 10 and 11, as well as one input of an element 12 AND-NOT, the output of which is connected to the installation input of the counter 2 pulses and to the control system thyristor orams straightened In the generator 1 of the pulses, the variable resistor 13 is turned on through the contact 14 of the relay 10, and parallel to this chain, through the contact 15 of the relay 11 the variable resistor 16 is turned on. When the supply voltage is applied, the trigger 5 is set to one of the stable conditions. In this case, the signal, for example, from the first output of the trigger goes through the input delay element 6 of the power amplifier 8, which turns on the relay 10. Relay 14 connects a variable resistor 13 to the pulse generator 1 system, after which the generator begins to generate pulses with a certain frequency. These pulses are fed to the input of the counter 2 pulses, from one of the outputs of which, after counting a certain number of pulses, the signal i through the switch 4 enters the second input of trigger B and brings it to another steady state. As a result, the signal stops coming to the input of the power amplifier 8 and this amplifier instantly turns off the relay 10. At the same time, at the output of the amplification-n 8 there appears a signal which arrives at the first input of the elemon 12 AND-NOT. Immediately after the transition of the trigger 5 to another stable state, the second input of the element 12 I-IE from the output of the power amplifier 9 also sends a signal i, because to the input of the amplifier 9 a signal 1 from the second trigger input enters through delay element 7 not instantaneously, but from a time delay during which the output of the 12-AND-NOT element gives a signal O, which sets the pulse counter to its initial state and prohibits the operation of the rectifier thyristor control system. 1 arrives at When the signal input of amplifier 9 power, the latter switches on relay 11, which connects variable resistor 16 to pin 1 of the pulse generator with its contact 15, and the signal O from the output of amplifier 9 is fed to the second input of element 12 I-ЯВ :, which causes The output of this element is a signal that permits operation of both the pulse counter and the rectifier thyristor control system. The pulse generator begins to generate, and the pulse counter - count pulses. After counting a certain number of pulses from one of the outputs of the counter, the IT through the switch 3 to the first input of the flu gauge 5 and translates it into another steady state. In this case, the relay 11 is turned off, a signal arrives at the second input of the element 12 AND-NOT, which causes the appearance of the signal O on the i-o-lh output of which is determined by the delay element 6. After the signal arrives at the input of the power amplifier 8, the circuit operates in the same way. The time of the trigger in each of the steady states, and accordingly, the time and reverse thyristors of the rectifier is determined by the frequency of the pulse generator and the position of the switches 3 and 4. The invention The device for controlling the reversible rectifier containing a pulse generator with a variable resistor, connected to the pulse counter, the output of which through the first switch is connected to the first input of the trigger, to the second input of which the second switch is connected two delay elements and two amplifiers l, is different. that, for the sake of simplicity, it is equipped with an I-IE element, two relays, a pulse generator with a second variable resistor, and a pulse counter with additional outputs, with each trigger output connected via the corresponding delay elements and an amplifier to the relay, the outputs of the amplifiers are connected to the element inputs AND-NOT, the output of which is connected to the installation input of the pulse counter, the additional outputs of which are connected to the inputs of the second switch. Sources of information taken into account during the examination 1. Electrotechnical prog. - Ser. Conversion Technique, 1974, no. 12, p. 33. 2. Semiconductor devices and converters,.

2. Saransk, Moscow State University, 1973, p.101103.

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