SU1661971A1 - Pulse generator - Google Patents

Abstract

The invention relates to a pulse technique and can be used to generate pulses of a certain duration when the supply voltage is turned on. The purpose of the invention is to increase the reliability of work. The pulse generator contains windings 1 and 7 of electromagnetic relays, dynistors 4 and 8, resistors 5 and 9, contacts 6 and 13 of the relay with winding 1, contacts 10 and 14 of the relay with winding 7 and capacitors 11, 12. Introduction of diodes 15 and 16 included in the opposite direction parallel to resistors 5 and 9, connecting pins 13 in parallel from a series-connected dynistor 4 and resistor 5, and connecting pins 14 to a parallel circuit from a series-connected dynistor 8 and resistor 9 reduce the number of contact elements. 1 il.

Description

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The invention relates to a pulse technique and can be used to generate pulses of a certain duration when the supply voltage is turned on.

The purpose of the invention is to increase the reliability of operation by reducing the number of contact elements.

The drawing shows a circuit diagram of a pulse generator.

The pulse generator contains a winding 1 of the first relay connected to the supply buses 2 and 3 through the first distor 4 connected in series, connected in the forward direction, the first resistor 5 and the disconnecting contacts 6 of the second relay, the winding 7 of which is connected to the buses 2 and 3 through serially connected the second dynistor 8, the second resistor 9 and the first closing contacts 10 of the first relay. The first 11 and second 12 capacitors are connected to windings 1 and 7 through a 4 and 8, respectively. In parallel, the circuit of the series-connected dinistor 4 and resistor 5 is connected to the second closing contacts 13 of the first relay, and the circuit contacts 14 of the second relay are connected in parallel of the circuit of the series-connected dinistor 8 and resistor 9. Resistors 5 and 9 are shunted in the opposite direction with diodes 15 and 16, respectively.

To protect the dynistors 4 and 8 from the reverse voltage, diodes 17 and 18 may be included.

The generator works as follows.

When voltage is applied to buses 2 and 3, capacitor 11 begins to charge. Since the dynistor 4 is closed, the charge current of the capacitor is determined by the resistance of the resistor 5. At the same time, the value of the current can be much less than the current value of the relay with winding 1. When a voltage across the capacitor 12 is equal to the switching voltage of the dynistor 4 . Winding Relay

1 is activated and, by its contacts 11, shunt resistor 5 and dynistor 4. Consequently, a supply voltage is applied to winding 1. At the same time, contacts 10 are closed, after charging the capacitor 12, dynistor 8 is turned on and winding 7 is energized. The second relay is activated and its contacts 6 disconnects winding 1 from the supply bus 3. But the relay

winding 1 remains switched on due to the charge accumulated by capacitor 11. Since dynistor 4 is shunted by pin 13, the relay with winding 1 is turned off only at a current equal to the release current of this relay. After a relay with a winding 1 is turned off after a delay, the relay with a winding 7 is likewise turned off. In the future, the work cycle is repeated.

Claims (1)

Invention Formula The pulse generator containing the winding of the first relay connected to the power bus through serially connected the first dynistor, included in the forward direction, the first resistor and the disconnecting contacts of the second relay, the winding of which is connected to the supply rails through the second dynistor connected in series to the direct direction, the second resistor and the first closing contacts of the first relay, the first and second capacitors connected to the windings of the first and second relays through the first and second dynistors, respectively, the second make contacts of the first relay and the make contacts of the second relay, characterized in that, in order to increase the reliability of operation, the first and second diodes are connected in the opposite direction parallel to the first and second resistors, respectively, the second closing contacts of the first relay are connected in parallel connected first dynistor and 5 resistors, and the closing contacts of the second relay are connected in parallel to a circuit of series-connected second dynistor and resistor.