SU1764146A1 - Pulse generator - Google Patents

Abstract

Usage: in the pulse technique, in particular, in the systems of automatic control and regulation, for example, as a switch of information channels, in control circuits of liquid dispensers. SUMMARY OF THE INVENTION: The introduction of diodes 7-14 into the circuit and the use of two groups of contacts 15 and 16 of a two-winding relay 1 with self-holding made it possible to eliminate the switching contacts of the relay from the discharge circuits of the capacitor 4, while the diodes 13 and 14 ensure the normal operation of the contacts 16, excluding shunting capacitor plates 4 at the time of switching, thereby increasing the reliability of the generator and increasing the stability of the duration of the generated pulses. 1 il. / 7

Description

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Ј Os

The invention relates to a pulse technique and can be used in automatic control and regulation systems, for example, as a switch of information channels, in control systems for liquid dispensers.

The purpose of the invention is to increase the stability of the generated pulses and the reliability of the generator.

The drawing shows the electrical circuit of the pulse generator.

The generator contains a two-winding relay 1 with self-holding, a thyristor 2, a threshold element at the Zener diode 3, a capacitor 4, the first 5 and second 6 resistors, the first 7, the second 8, the third 9, the fourth 10, the fifth 11, the sixth 12, the seventh 13 and the eighth 14 diodes, the first 15 and the second 16 groups of relay contacts, bus 17, 18 of the power supply. The second terminals of the relay coils are connected through the thyristor 2 to the diodes 9 and 10, the control electrode of the thyristor is connected to the anode of the Zener diode 3, the cathode of the Zener diode 3 is connected to the cathodes of diodes 11 and 12, the cathode of the diode 9 and the anode of diode 11 are connected to the output of resistor 5, and also to the capacitor plate 4 and to the anode of the diode 13, the cathode of which is connected to the fixed contact 16 of the relay, and then through the movable contact to the power supply bus 18, another plate of the capacitor 4 is connected to the anode of the diode 12. to the cathode of the diode 10, to the output of the resistor 6 and the diode anode 14, the cathode to torogo connected to the fixed contact 16 and via a second terminal of the resistor 6 - with the fixed contact 15; with the anode 8, the cathode of which is connected to the first output of the first winding of relay 1, the resistor 6 is connected via a movable contact 15 to the power supply bus 17, another fixed contact 15 is connected to the second output of the resistor 5 and simultaneously to the anode of the diode 7, the cathode of which is connected to the first the output of the second winding of the relay 1.

To provide a galvanic connection between the electrodes of the thyristor 2 between the control electrode of the thyristor and its cathode, a resistor 19 can be turned on.

The generator operates as follows oGpaz. .

After supplying voltage, the capacitor 4 starts charging along the circuit: power supply bus 17 - pin 15 - resistor 6 - capacitor 4 - diode 13 - pin 16 - bus 18 of the power source. As soon as the voltage across it reaches the turn-on threshold of the Zener diode 3, it will open and capacitor 4 will begin to discharge along the circuit: the plus side of the capacitor 4 is a diode

12-zener diode 3-control electrode of thyristor 2 and resistor 19 - diode 9 - minus plate of capacitor 4. Thyristor 2 will open. And relay 1 will switch along the circuit:

thyristor 2 — diode 9 — diode 5 — break contact 16 — power bus 18. At the moment of switching of contacts 15 and 16, thyristor 2 will close, before that Zener diode 3 will also close. Power bus 17 through terminal 15

connects to resistor 5, and bus 18 via pin 16 to the cathode of diode 14. Capacitor 4 will begin to recharge across the circuit: bus 17 - pin 15 - resistor 5 - capacitor 4-diode 14-pin 16-bus

18. When the voltage on the capacitor 4 reaches the turn-on threshold of the Zener diode 3, the latter will open across the circuit: the plus side of the capacitor 4 - diode 11 - the zener diode 3 - control electrode of the thyristor 2 and the resistor 19 - diode 10 - the negative face of the capacitor 4. Thyristor 2 again opens, and relay 1 switches over the circuit: bus 17 - pin 15 - diode 7 - second winding relay 1 - thyristor 2 - diode 10 - diode

14 - pin 16 - bus 18. At the moment of switching contacts 15 and 16, thyristor 2 will close, before it the Zener diode 3 is turned off, since the voltage across it will drop to the value of the shutdown. Relay 1 operates on the second winding (the end of the pause, the beginning of the second pulse). The process is repeated.

As can be seen, using a group of diodes and two groups of contacts, the generator functions normally, while there are no switching contacts of the relay in the discharge capacitor circuits, and the diodes 13 and 14 ensure the normal operation of the contacts 16, excluding them bypassing the capacitor plates 4 at the moment switch,

this increases the reliability of operation and the stability of the duration of the generated pulses.

Claims (1)

Claims An impulse generator containing a self-holding two-winding relay, two groups of contacts of this relay, a thyristor, the control electrode of which is connected to the input of the threshold element, a capacitor, the first and second resistors, the first terminals of which are connected respectively to the fixed contacts of the first group of relay contacts, differing the fact that, in order to increase the stability of the generated pulses and the reliability of the generator, it introduced eight diodes, the cathodes of the first and second of which are connected to the first bubbled conclusions dvuhob- windings of winding relay, and anodes - with fixed ontektami first of groups. relay contacts 5 17641466 respectively, the second terminals of the windings of the cathodes of the fifth and sixth diode-winding relays are connected via a thyristor of the connections to the output of the threshold eledin to the anode connection point of the third-ment, and the cathodes of the seventh and eighth diodes its and the fourth diodes, the cathodes of which are connected respectively with fixed connections respectively with the second output pins of the second group of contacts of the first and second resistors with the output, moving contacts of both groups The capacitors, the anodes of the fifth, the relay contacts are connected to the corresponding sixth, seventh, and eighth diodes, and the point source power tires.