SU1383318A1

SU1383318A1 - Temperature controller

Info

Publication number: SU1383318A1
Application number: SU864158815A
Authority: SU
Inventors: Юрий Александрович Аносов
Original assignee: Днепропетровский Радиозавод
Priority date: 1986-10-29
Filing date: 1986-10-29
Publication date: 1988-03-23

Abstract

Изобретение относитс к автоматике, в частности к устройствам дл регулировани температуры при использовании терморезисторов . Устройство содержит последовательно включенные в сеть переменного тока нагреватель и тиристор, параллельно которым включены последовательно соединенные первый резистор, диод и конденсатор , а также пороговый элемент, второй резистор и терморезистор. Дл упро- ш,ени и повышени точности устройства второй резистор и терморезистор образуют Г-образный четырехполюсник, вход которого через пороговый элемент соединен с конденсатором , а выход - с управл ющим электродом тиристора. з.п. ф-лы, 3 ил.The invention relates to automation, in particular to devices for temperature control using thermistors. The device contains a series-connected heater and a thyristor, in parallel with which are connected the series-connected first resistor, diode and capacitor, as well as a threshold element, a second resistor and a thermistor. To simplify, improve the accuracy of the device, the second resistor and the thermistor form an L-shaped quadrupole, the input of which through a threshold element is connected to the capacitor and the output to the control electrode of the thyristor. zp f-ly, 3 ill.

Description

00 00 00 ОО00 00 00 GS

Изобретение относитс к области регулировани температуры с использованием электрических средств и может быть использовано в устройствах дл регулировани температуры с терморезисторами в качестве термочувствительных элементов.The invention relates to the field of temperature control using electrical means and can be used in temperature control devices with thermistors as temperature-sensitive elements.

Цель изобретени - упрощение и повышение точности.The purpose of the invention is to simplify and improve accuracy.

На фиг. 1 представлена схема устройства при использовании терморезистора с отрицательным температурным коэффициентом; на фиг. 2 - схема выполнени Г-образного четырехполюсника при использовании терморезистора с положительным температурным коэффициентом; на фиг. 3 - схема подключени стабилизатора.FIG. 1 shows a diagram of the device when using a thermistor with a negative temperature coefficient; in fig. 2 is a diagram of the implementation of an L-shaped quadrupole using a thermistor with a positive temperature coefficient; in fig. 3 - diagram of the stabilizer connection.

Устройство содержит нагреватель 1, тиристор 2, конденсатор 3, диод 4, первый резистор 5, пороговый элемент 6, реализованный на динисторе, Г-образный четырехполюсник 7, состо щий из терморезистора 8 и второго резистора 9, переменный резистор 10, стабилитрон 11.The device contains a heater 1, a thyristor 2, a capacitor 3, a diode 4, the first resistor 5, the threshold element 6 implemented on a dynistor, an L-shaped quadrupole 7 consisting of a thermistor 8 and a second resistor 9, a variable resistor 10, a zener diode 11.

При отрицательном температурном коэффициенте терморезистора 8 он включен на выходе четырехполюсника 7 {фиг. 1), а второй резистор 9 включен в плечо четырехполюсника (между полюсами А и В).With a negative temperature coefficient of thermistor 8, it is turned on at the output of the quadrupole 7 {FIG. 1), and the second resistor 9 is included in the quadrupole arm (between the poles A and B).

При положительном температурном коэффициенте четырехполюсник 7 должен быть выполнен в виде, приведенном на фиг. 2, где терморезистор 8 включен в плечо че- тыр1ехполюсникг, а резистор 9 включен на его входе.With a positive temperature coefficient, the quadrupole 7 should be made as shown in FIG. 2, where the thermistor 8 is included in the shoulder of four polarized circuits, and the resistor 9 is connected at its input.

При работе устройства в широком диапазоне температур окружающей среды дл повышени его точности вместо перени динистора 6 и коэффициента К пере чи напр жени четырехполюсника 7. Э импульс обеспечивает включение тиристор и подключение нагревател 1 к сети пеWhen the device operates in a wide range of ambient temperatures to increase its accuracy, instead of transferring distor 6 and coefficient K to voltage of a quadrupole 7. This pulse ensures that the thyristor is turned on and the heater 1 is connected to the mains

г менного тока. В отрицательный полупер напр жени питани тиристор 2 закрыва с и обесточиваетс нагреватель 1, а дио закрываетс , обесточивает все элемен схемы управлени тиристором. Далее процессы повтор ютс таким же образalternating current. In the negative semiconductor voltage supply, the thyristor 2 is closed with and the heater 1 is de-energized, and the diode is closed, de-energizes all the elements of the thyristor control circuit. Further, the processes are repeated in the same manner.

10 до тех пор, пока коэффициент К, уме щающийс за счет нагревани регулир мого объекта, не уменьшитс при дос жении заданной температуры настолько, импульс напр жени с выхода . четыр10 until the coefficient K, resulting from the heating of the regulated object, decreases when the set temperature is reached as much as the voltage pulse from the output. four

.|г полюсника 7 не будет обеспечивать вкл чение тиристора 2, а следовательно, и наг вател I. Однако при последующем уме шении температуры коэффициент К переда напр жени термочувствительного четыр полюсника 7 увеличитс и все процесThe polar pole 7 will not ensure the inclusion of the thyristor 2 and, therefore, the load of the capacitor I. However, upon a subsequent decrease in temperature, the coefficient K of the voltage transfer of the thermosensitive four pole 7 will increase also

20 вновь повтор ютс .20 are repeated again.

Предлагаемое устройство проще изве ного, при этом его параметры слабо вис т от температуры, что повышает точность. Кроме того, устройство облад высокой надежностью и КПД.The proposed device is simpler known, while its parameters weakly depend on temperature, which improves accuracy. In addition, the device has high reliability and efficiency.

2525

30thirty

Claims

Claims 1. A device for adjusting the power supply, comprising in series with a thyristor and a heater, connected to an AC network, in parallel with which a successor is connected a connected capacitor, a diode and a first resistor, as well as a threshold element, a second resistor and a variable resistor, than the capacitor is connected to one output

sliver between points B and E (Fig. I) is barely-ss to the thyristor cathode, and another output

blowing turn on Zener diode 11 (Fig. 3).

The device works as follows.

When the AC source is turned on in the positive half-period, the capacitor 3 is charged through the resistor 5 and diode 4. When the voltage on the capacitor 3 reaches the turn-on voltage of the distor 6, the capacitor pa: -1r goes through the opened drive 6. Due to this, a voltage pulse appears at the output of the L-shaped quadrupole 7, the amplitude of which is determined by the voltage applied to the input of the threshold element, characterized in that, in order to simplify and improve accuracy, the output of the threshold element is connected to To the connecting electrode of the transistor through a series-connected variable resistor and a L-shaped quadrupole, in one of the arms of which the second resistor is connected, and in the other plate - a thermistor.

2. A device according to claim 1, characterized in that the output of the L-shaped quadrupole is dinane with a control transition thyristor through a zener diode.

45

neither dynistor 6 and the voltage transfer factor K of the quadrupole 7. This pulse ensures that the thyristor 7 is turned on and the heater 1 is connected to the AC network. In the negative half-period of the supply voltage, the thyristor 2 is closed and the heater 1 is de-energized, and the diode 4 is closed, de-energizes all elements of the thyristor control circuit. Further, these processes are repeated in the same way.

until the coefficient K, decreasing due to the heating of the controlled object, decreases when the set temperature is reached so that the voltage pulse from the output. the quadrupole 7 will not ensure the inclusion of the thyristor 2, and therefore the heater I. However, with a subsequent decrease in temperature, the voltage transfer coefficient K of the thermosensitive quadrupole 7 will increase and all the processes

repeated again.

The proposed device is simpler known, and its parameters weakly depend on temperature, which increases its accuracy. In addition, the device has high reliability and efficiency.

Claim 1. A device for temperature control, containing a series-connected thyristor and heater, connected to an AC network, in parallel with which are connected a series-connected capacitor, a diode and a first resistor, as well as a threshold element, a second resistor and a variable resistor, with the capacitor connected by a single terminal

to the thyristor cathode, and another conclusion

to the input of the threshold element, characterized in that, in order to simplify and improve the accuracy, the output of the threshold element is connected to the control electrode of the thyristor through a series-connected variable resistor and L-shaped quadrupole, in one of the arms of which the second resistor is connected, and the other shoulder is a thermistor.

2. A device according to claim 1, characterized in that the output of the L-shaped two-port network is connected to a control transition of the thyristor through a zener diode.

Phage.

FIG. 2

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