SU951591A1

SU951591A1 - Discrete phase-shifting device

Info

Publication number: SU951591A1
Application number: SU813235888A
Authority: SU
Inventors: Михаил Викторович Напрасник; Александр Васильевич Беляев; Александр Владимирович Левченко; Виктор Иванович Плис
Priority date: 1981-01-13
Filing date: 1981-01-13
Publication date: 1982-08-15

Description

(54) ДИСКРЕТНОЕ ФАЗОСДВИГАЮЩЕЕ УСТРОЙСТВО(54) DISCRETE PHASE-SHIFTING DEVICE

1one

Изобретение относитс к преобразовательной техники и может быть использовано дл регулировани фазы управл ющих импульсов тиристорных выпр мительно-инверторных преобразователей, например , электровозов.5The invention relates to converter equipment and can be used to control the phase of control pulses of thyristor rectifier-inverter converters, for example, electric locomotives.

Известны фазосдвигающие устройства, содержащие нуль-орган, подключенный к источнику напр жени синхронизации и элементу запрета, генератор тактовых импульсов , счетчик тактовых импульсов, Q ключенный к выходу элемента запрета и щиной сброса - к выходу нуль-органа 1.Phase-shifting devices are known that contain a null-organ connected to a source of synchronization voltage and an inhibition element, a clock generator, a clock counter, Q connected to the output of the inhibit element, and a reset button to the output of the zero-organ 1.

Недостатком известных устройств вл етс невысока надежность, обусловленна их сложностью.A disadvantage of the known devices is the low reliability due to their complexity.

Наиболее близким техническим рещ.ени- 15 ем к изобретению вл етс дискретное фазосдвигающее устройство, содержащее генератор тактовых импульсов, нуль-орган, вход которого соединен с клеммой дл подключени источника напр жени синхронизации , счетчик тактовых .импульсов со входом сброса, одни выходы которого соединены с выходами дещифратора максимального угла отпирани вентилей преобразовател и вторые выходы - с первыми вхо2The closest technical solution to the invention is a discrete phase-shifting device containing a clock pulse generator, a null organ, the input of which is connected to a terminal for connecting a synchronization voltage source, a counter of clock pulses to the reset input, one outputs of which are connected with the outputs of the deflector, the maximum angle of unlocking the converter valves and the second outputs - with the first in2

дами блока сравнени кодов, вторые входы которого соединены с выходами регистра системы управлени , а выход блока сравнени кодов соединен с выходом дещифратора , и клеммы дл подключени вентилей преобразовател 2.The code comparison block, the second inputs of which are connected to the outputs of the control system register, and the output of the code comparison block are connected to the output of the descrambler, and the terminals for connecting the valves of the converter 2.

Недостатками устройства вл ютс невысока надежность и помехоустойчивость, обусловленна тем, что длительность выходного управл ющего импульса при переменном значении кода в регистре системы управлени мен етс в пределах от периода тактовых импульсов до нул .The drawbacks of the device are low reliability and noise immunity, due to the fact that the duration of the output control pulse with a variable code value in the control system register varies from the period of clock pulses to zero.

Целью изобретени вл етс повыщение надежности и помехоустойчивости дискретного фазосдвигающего устройства.The aim of the invention is to increase the reliability and noise immunity of a discrete phase shifter.

Claims

The goal is achieved by the fact that in the device the control system register is equipped with a recording input and a clock counter — an additional input connected to the output of the clock generator, where the output of the zero-organ is connected to the reset input of the clock counter and the recording record of the control system register, and terminals to connect the converter valves are connected to the output of the code comparison unit. The drawing shows a circuit diagram of a discrete phase shifting device. The device contains a clock pulse generator 1, the output of which is connected to the input of the clock pulse counter 2, a null organ 3 having an input for connection to a source of synchronization voltage. The output of the zero-organ 3 is connected to the Reset input of the counter of clock pulses 2 and to the input of the record of the register of the control system 4, to the input of which a control is applied; code, ,, and the output is connected to one of the inputs of the comparison code of codes 5. Lo; L () input - comparison circuit codes 5 e; Kvun; 4 ii with the output of the counter of clock pulses 2. Input of the decoder 6 maximum valve unlocking angle the converter is connected to the output of the clock counter 2, and the output of the decoder is connected to the output of the code comparison circuit 5, to which the terminals for connecting the converter valves are connected. Discrete phase-shifting device operates as follows. At the output of the null organ 3, pulses appear at the moment of passing through the zero the voltage of the corresponding phase, i.e., at the beginning of the half period, the voltage of the corresponding phase. These pulses are fed to the reset input of the R-counter 2, wrapped around it, and the input to the record S of the control system register 4 for census from the control system of the new code value. After the reset, the counter 2 is filled with the clock generator 1 until the code value from the output of counter 2 becomes equal to the value of the code in the control system register 4. At this moment, the output of the comparison circuit 5 is a control pulse whose duration is equal to the period clock frequency 1. If the code value is greater than the maximum unlocking angle of the converter valves, the control pulse appears from the output of the decoder 6. Since the code value in the control system 4 register changes only at the beginning of the floor Heat-voltage, the duration of the control pulse is equal to one period of the clock frequency. The application of the invention provides increased noise immunity, since the code value in the control system register changes only at the beginning of the half-period of the supply voltage and the duration of the control pulse is constant, and consequently, the reliability of the device increases. Claims Discrete phase-shifting device for controlling converter valves, comprising a clock pulse generator, a null organ, the input of which is connected to a terminal for connecting a synchronization voltage source, a clock pulse counter with a reset input, one outputs of which are connected to the decoder outputs of the maximum angle of valve unlocking the converter, the second outputs - with the first inputs of the code comparison block, the second inputs of which are connected to the outputs of the control system register, and the output of the block code comparison is connected to the output of the decoder and the terminal for connecting the converter valves, characterized in that, in order to increase reliability and noise immunity, the control system register is equipped with a recording input and a clock counter, an additional input connected to the output of the clock generator, the output, the zero-organ is connected to the reset input of the clock counter and the recording input of the control system register, and the terminals for connecting the converter valves are connected to the output of the block code comparison. Sources of information taken into account in the examination 1. USSR author's certificate number 465704, cl. H 02 R 13/16, 1974.

2. USSR author's certificate number 647833, cl. H 02 R 13/16, 1979.