SU907758A1

SU907758A1 - Digital device for control of converter

Info

Publication number: SU907758A1
Application number: SU802943852A
Authority: SU
Inventors: Валерий Павлович Феоктистов
Priority date: 1980-06-25
Filing date: 1980-06-25
Publication date: 1982-02-23

Description

(54) ЦИФРОВОЕ УСТРОЙСТВО ДЛЯ УПРАВЛЕНИЯ ПРЕОБРАЗОВАТЕЛЕМ(54) DIGITAL DEVICE FOR CONTROLLING THE CONVERTER

1one

Изобретение относитс к электротехнике и может быть использовано в устройствах управлени и регулировани электроприводов .The invention relates to electrical engineering and can be used in devices for controlling and regulating electric drives.

Известны цифровые устройства управлени , выполненные на основе реверсивных 5 счетчиков.Digital control devices are known that are based on reversible 5 counters.

Недостатком этого устройства вл етс низка точность управлени .A disadvantage of this device is low control accuracy.

Наиболее близким к изобретению по технической сущности и достигаемому эффекту ,Q вл етс цифровое устройство дл управлени преобразователем, содержащее реверсивный счетчик, первый и второй элементы И, первый и второй элементы ИЛИ, задающий генератор импульсов, первый и второй пороговые элементы, выходы ко- 15 торых соединены с первыми входами первого и второго элементов И соответственно, вторыми входами соединенных с выходами задающего генератора импульсов.Closest to the invention in its technical essence and effect achieved, Q is a digital device for controlling a converter, comprising a reversible counter, first and second elements AND, first and second elements OR, driving pulse generator, first and second threshold elements, outputs 15 second connected to the first inputs of the first and second elements And, respectively, the second inputs connected to the outputs of the master pulse generator.

Недостатком этого устройства вл етс о также низка точность управлени .A disadvantage of this device is also the low control accuracy.

Цель изобретени - повышение точности управлени .The purpose of the invention is to improve the accuracy of control.

Поставленна цель достигаетс тем, что известное устройство снабжено первым иThe goal is achieved by the fact that the known device is supplied first and

вторым элементами задержки и первым и вторым дифференцирующими элементами, элементы Ии снабжены дополнительным входом , причем выходы первого и второго пороговых элементов соединены с дополнительными входами первого и второго элементов И через первый и второй элементы задержки соответственно, первые входы первого и второго элементов ИЛИ соединены с выходами первого и второго элементов И соответственно, вторые входы первого и второго элементов ИЛИ соединены с выходами первого и второго пороговых элементов через соответствующий дифференцирующий элемент, выходы первого и второго элементов ИЛИ соединены с вычитающим и суммирующим входами реверсивного счетчика соответственно.the second delay elements and the first and second differentiating elements, the elements AI are provided with an additional input, the outputs of the first and second threshold elements are connected to the additional inputs of the first and second elements AND through the first and second delay elements respectively, the first inputs of the first and second elements OR are connected to the outputs the first and second elements And, respectively, the second inputs of the first and second elements OR are connected to the outputs of the first and second threshold elements through the corresponding di the power element, the outputs of the first and second elements OR are connected to the subtractive and summing inputs of the reversible counter, respectively.

На чертеже представлена с.хема цифрового устройства дл управлени преобразователем .The drawing shows a digital circuit device for controlling a converter.

Claims

The device contains the first 1 and second 2 threshold elements, the outputs connected to the first inputs of the first 3 and second 4 elements And, respectively, and through the first 5 and second 6 delay elements with additional inputs of And elements, respectively, the first 7 and second 8 differentiating elements, through which b5 outputs the first and second threshold elements are connected to the second inputs of the first 9 and second 10 elements OR, respectively, the first inputs of which are connected to the corresponding outputs of the master pulse generator 11 through the first and the second element AND, respectively, a reversible counter 12 connected by inputs to the outputs of the elements OR 9 and 10. The output of the reversible counter is intended for connection to a control unit. The device works as follows. If the load current corresponds to the specified value, the output signals of the threshold elements 1 and 2 are equal to zero. Logic elements And 3 and 4 are closed and do not transmit pulses from output 1 to reversible counters of the generator 12. The code recorded in this counter corresponds to the fill factor with which the control unit switches the load on and off. If the load current increases, the threshold element 1 is triggered, the differential element 8 and the element OR 9 receive a pulse to the subtraction input of the reverse counter 12у. As a result, the code in it decreases, the filling code implemented by the control unit decreases. At the output of delay element 5, a pulse appears after a certain period of time. During this time, the element And 3 remains closed, which eliminates the possibility of impulses from the generator 11 to the input of the counter 12 simultaneously with the pulse of the differentiating element 8. After the eye (1 h ;, and the delay of the delay element 8, the reversing counter 12 operates on the pulses of the generator 11 if the threshold element 1 continues to remain in the unit state. Similarly, the device operates in case of a decrease in the load current below the permissible value. In this case, the threshold element 2, the second differentiating element 7, the second element OR 10, and the second element AND 4, with the result that the summing input of the reversible counter 12 receives pulses that change the fill factor, respectively. Use of the device improves the accuracy of the load control. the counter, the first and second elements And, the first and second elements OR, the master pulse generator, the first and second threshold elements, the outputs of which are connected to the first inputs of the first O and the second elements And, respectively, the second inputs connected to the outputs of the master pulse generator, characterized in that, in order to increase the control accuracy, it is equipped with first and second delay elements and first and second differentiating elements, And elements are provided with an additional input, the outputs of the first and second threshold elements are connected. With additional inputs of the first and second elements AND through the first and second elements of the delay, respectively, the first inputs of the first and second elements OR with united with the outputs of the first and second elements And, respectively, the second, ry inputs of the first and second elements OR are connected to the outputs of the first and second threshold elements through a corresponding differentiating element, the outputs of the first and second elements OR are connected to the subtractive and summed, their inputs are reversible counter, respectively . AFAZHALA FAFF fff f /