SU547866A1

SU547866A1 - Frequency relay

Info

Publication number: SU547866A1
Application number: SU2160587A
Authority: SU
Inventors: Сергей Яковлевич Яшонков; Анатолий Александрович Галактионов
Original assignee: Предприятие П/Я Р-6759
Priority date: 1975-08-04
Filing date: 1975-08-04
Publication date: 1977-02-25

Description

1one

Изобретение относитс к автоматике и может использоватьс в системах автоматического контрол и регулировани .The invention relates to automation and can be used in systems of automatic control and regulation.

Известны реле частоты, имеющие формирователь пр моугольных импульсов из входного синусоидального напр жени , врем задающее устройство и реагирующий орган, характерной особенностью которых вл етс то, что в них дл повышени надежности срабатывани реле в схему ввод т накопительные или инерционные элементы, которые значительно снижают быстродействие реле.Frequency relays are known to have a square pulse shaper from an input sinusoidal voltage, a timing device and a reacting organ, the characteristic feature of which is to accumulate or inertial elements into the circuit to increase the reliability of the relay, which significantly reduces the speed relay.

Наиболее близкое к изобретению реле частоты содержит формирователь, мультивибратор и реагирзтощий орган.The frequency relay closest to the invention contains a driver, a multivibrator, and a reacting organ.

На вход реагирующего органа, в качестве которого используетс триггер, поступают отрицательные импульсы формировател и положительные продифференцированные импульсы с входа мультивибратора, которые до момента срабатывани гас тс отрицательными импульсами формировател . При увеличении частоты входного сигнала, в момент срабатывани , на входе триггера по вл етс последовательность разнопол рных импульсов.Триггер начинает измен ть свое состо ние с частотой входного сигнала, т.е. о срабатывании реле суд т по наличию вибрации реагирующег органа, что ограничивает использование подобного реле и снижает надежность его работы .Negative impulses of the former and positive differentiated impulses from the input of the multivibrator are received at the input of the reacting organ, which uses a trigger, and are quenched by the negative impulses of the multivibrator. As the frequency of the input signal increases, at the moment of operation, a sequence of opposite-polarity pulses appear at the trigger input. The trigger starts to change its state with the frequency of the input signal, i.e. the relay is triggered by the presence of vibration of the reacting organ, which limits the use of such a relay and reduces the reliability of its operation.

Цель изобретени - повышение надежности работы реле частоты.The purpose of the invention is to increase the reliability of the frequency relay.

Это достигаетс тем, что в известное устройство , содержащее формирователь импульсов , ждущий мультивибратор и реагирующий орган, введены инвертор, две дифференцирующие цепочки и два диодных ключа, а реагирующий орган выполнен в виде триггера с раздельными входами, причем выход формировател соединен со входами диодных ключей (одного - непосредственно, а другого через инвертор) и входом ждущего мультивибратора , выход которого через дифференцирующие цепочки также подключен к входам диодных ключей, выходы которых, в свою очередь, подключены к раздельным входам триггера.This is achieved by introducing an inverter, two differentiating chains and two diode keys into a known device containing a pulse shaper, a multivibrator waiting and a reacting organ, and the reacting organ is designed as a trigger with separate inputs, and the output of the imager is connected to the diode switch inputs ( one directly, and the other through an inverter) and an input of a standby multivibrator, the output of which through differentiating chains is also connected to the inputs of diode switches, the outputs of which, in turn, are connected to separate trigger inputs.

Claims

FIG. 1 is a block diagram of a frequency relay; in fig. 2 - its basic electrical scheme. The frequency relay contains a driver 1, the output of which is connected to the input of the standby multivibrator 2, two parallel differentiating chains 3, 4, an inverter 5, two diode switches 6, 7 and a trigger 8 with separate inputs. The output signal of the imager 1 is fed to the diode switch 7 and through the inverter 5 to the diode switch 6. With its front edge, the rectangular impulse of the imager starts the waiting multivibrator 2, which forms a negative pulse of a certain duration. The rear edge of the output pulse of the multivibrator is differentiated by two parallel chains 3, 4 and the differentiated pulses arrive at the diode keys 6 and 7. At the same time, if the pulse width of the driver is greater than the pulse width of the multivibrator, then the matching circuit of the diode key 7, and the differentiated pulse from the output of the chain 4 arrives at the corresponding trigger input. We assume that in this case the trigger has switched to the initial state. As the frequency of the input signal increases, the duration of the output pulses of the driver at some point will be less than the length of the pulse of the multivibrator, the diode switch 6 will work, and the positive diffused pulse from the output of the chain 3 will go to another trigger input. In this case, the trigger is tripped, i.e. the relay will work. When the frequency of the input signal decreases, the circuit returns to its original state. Frequency relay proposed (increases the efficiency of automatic control systems and high-speed automatic control systems. Formula of the invention A frequency relay comprising a square pulse shaper from a sinusondal input voltage, a waiting multivibrator and a responsive organ, characterized in that it has an inverter, two differentiating chains and two diode keys, and the reacting body is implemented as a trigger with separate inputs, and the output is formed l is connected to the inputs of diode switches, one directly, and the other through an inverter, and the input of a standby multivibrator, the output of which through differentiating chains is also connected to the inputs of diode keys, the switches of which are connected to x separate trigger inputs.