SU608132A1

SU608132A1 - Temperature regulator

Info

Publication number: SU608132A1
Application number: SU752126125A
Authority: SU
Inventors: Александр Иосиович Телис; Михаил Галилеевич Бранденбургский; Иосиф Яковлевич Котляренко; Владимир Миронович Левертов; Геннадий Александрович Макаров
Original assignee: Украинский Научно-Исследовательский Институт Станков И Инструментов; Одесский Завод Прессов И Автоматов
Priority date: 1975-04-21
Filing date: 1975-04-21
Publication date: 1978-05-25

Description

Изобретение относитс к области автоматического регулировани , а более конкре-гно к регулированию температуры зон обогрева материальных цилиндров машин дл лить пластмасс под давлением.The invention relates to the field of automatic regulation and, more specifically, to the regulation of the temperature of the heating zones of the material cylinders of machines for molding plastics.

Известны устройства дл автоматического регулировани температуры, содержащие регулируюший блок с потенциальным выходом, функционально св занным с величиной ошибки регулировани , тиристюрный ключ, вьшолвенный на двух встречно-параллельно включенных тиристорах, и блок фазо-импульсно .го управлени тиристорным ключом ij .Devices for automatic temperature control are known that contain a control unit with a potential output functionally related to the value of the control error, a thyristor key located on two oppositely connected thyristors, and a phase-pulse control unit ij.

Выход. регулирующего блока соединен со входом блока фазоимпульсного- управлени , в состав которого входит генератор пилообразного напр жени , синхронизированный частотой сети В указанном устройстве управление средней мощностью в нагревателе проио- хрдит за счет изменени фазового угла нени тиристоров в каждом полу ериоде сетевого напр жени .Output. The regulating unit is connected to the input of the phase-impulse control unit, which includes a sawtooth generator synchronized by the mains frequency. In this device, the average power in the heater is controlled by varying the phase angle of the thyristors in each half of the mains voltage.

В р де случае, однако, регулирование температуры должно осуществл тьс как в автоматическом, так и в ручном режимах. In some cases, however, temperature control must be carried out in both automatic and manual modes.

Это необходимо, например, дл исключени аварийных ситуаций в случае выхода из стро канала автоматического регулировани . Дл организации режима ручного регулировани в этом случае отключают выход регулирующего блока от входа блока фазоимпульсного управлени , а к этому входу подключают дополнительный источник регулируемого напр жени ,This is necessary, for example, to avoid emergency situations in the event of failure of the automatic control channel. In order to organize the manual regulation mode, in this case, the output of the regulating unit is disconnected from the input of the phase-impulse control unit, and an additional source of adjustable voltage is connected to this input

Следовательно, регулирование в ручном режиме осугдеств етс через блок фазоимпульсного управлени .Consequently, manual control is judged through the phase-impulse control unit.

Однако сложность и низка надежность известного устройства обусловлены необходимостью введени дополнительных устройствгенератора пилообразногчз напр жени , порогового элемента и источника регулируемого напр жени ,However, the complexity and low reliability of the known device are due to the need to introduce additional devices of a sawtooth generator, a threshold element and a source of adjustable voltage,

Claims

- The closest technical solution is a temperature control device containing a control unit with an output M, an element, a thyristor control signal generator, and a control mode switch Lenin SLJ. However, for organizing the manual mode, it is necessary to introduce an additional device for phase control, thyristors, since the thyristors are controlled in automatic mode with a constant thyristor switching angle. This solution complicates the device and reduces its operational reliability. The aim of the invention is to simplify and increase the reliability of the device with non-automatic: automatic and manual control. . This is achieved by the fact that the driver of the control signal is flashed-en in the form of successively connected alternating capacitors and capacitors, which are shunted by diodes and connected through a parallel contact of the first control switch of the control modes and a contact of the output relay element in parallel the anode – cathode thyristor transitions of an executing organ, whose control electrodes are under power to the junction points of the capacitors and domain resistor. In the drawing, a device is illustrated. It contains a control unit 1 with an output relay element. 2, consisting of a series-connected air sensor 3, a node of comparison 4, an amplifier of a signal of an error 5, a node of summation 6, a threshold element 7 representing the Schmitt trigger, and a relay amplifier of power 8 K to the second input of the node of comparison 4 under ™ the keys are the output of the thermal sensor 9 installed in the control object - the material cylinder 1O. To the second input of summation node 6, the output of saw-tooth generator 11 is connected. The driver of the control signal 12 of the thrust actuator element 13 is a phase-shifting circuit consisting of two capacitors 14 and 15 connected in series, diodes 16 and 17 bypass, variable resistor 18 and the first contact of mode switch 19. Between common points indicated X the capacitors are connected in series with the control contact 2O of the output relay element 2, the second contact of the mode switch 21, the common points of the capacitors of the resistor 18 through the dynistors 22 and 23 are connected to the control Thyristor thyristor electrodes. This device in the automatic control of the textural control is a regulator with a width-modulated output signal in which the current through the heater flows during the closed state of contact 20. When operating in manual mode, the control circuit of the elements 18 and 14 and 18, 15 (at the corresponding supply wave). The resistance value of the resistor 18 is set manually and determines the phase angle of the thyristors, the control mode with the phase-impulse. Apparatus of the invention for controlling the temperature, comprising a control unit with an output relay element, a driver of the control valve actuator and an operating mode switch, characterized in that, in order to simplify the device and increase the reliability of the device with independent automatic and manual control, the driver The control signal is made in the form of series-connected resistors and capacitors shunted by diodes and connected in parallel the first contact of the control mode switch connected and the second contact of the control mode chat and contact switch of the switching relay element in series are parallel to the anode-cathode transitions of the actuator, the control electrodes of which are connected to the capacitor and variable resistor junction points. Sources of information taken into account in the examination: 1, V. V. Pevzner. Precision temperature regulators, Energie, 1973, p. 176-180. 2, Skarzhela V, A. sh. The device avomatic on thyristors, Kiev, 1974,. 1O1-1O5.