SU1012424A1 - Pulse generator - Google Patents

Abstract

GENERATOR SHUPUPOV on avt. St. 493001, in this case, in order to expand the frequency range, in it the output of each flC device is connected via an appropriate diode to the anode of the thyristor, the control electrode of which is connected through a PSG element with the output of this RC- chains.

Description

13

. + 4

i

11 G, „

The invention relates to automation and pulse technology.

According to the main author. St. N 93001 is a known pulse generator containing two integrating RC circuits, a trigger made on an electromagnetic relay and two thyristors, the control electrodes of which are connected via threshold elements to the outputs of the CS circuits connected by resistors to a power source via the switching contacts of the electromagnetic relay. : 1 As a relay, a double-winding polarized relay was used, the windings of which are included in the anode circuits of the thyristors and connected to the connection points of the resistors of the RC circuits with the corresponding commutating the contacts of the electromagnetic relay WITH

The disadvantage of the known pulse generator is the small frequency range, in which it can operate the RC capacitors, discharging through the windings of the relay, cannot discharge completely.

The purpose of the invention is the expansion of cha. Stotnogo range of the generator and pulses.

This goal is achieved by the fact that in the pulse generator the output of each RC circuit is connected via an appropriate diode to the anode of the thyristor, the control electrode of which is connected via a threshold element to the output of this RC circuit.

The drawing shows an electrical schematic diagram of the generator.

The pulse generator contains two integrating RC circuits consisting of resistors 1 and 2 and capacitors 3 and a polarized relay with windings 5 and 6 and thyristors 7 and 8.

To ensure the discharge of capacitors 3 and diodes 9 and 10 are used, Resistor 1 and winding 5 are connected to disconnecting contact 11, and switching contact 12 is connected to power bus 13. Resistor 2 and winding 6 are connected to closing contact 1, and switching contact 15 is also connected to power line 13. Thyristor control electrodes 7 and 8 are connected

to the resistor 1, the capacitor 3, the resistor 2 and the capacitor k through the zener diodes 16 and 17, respectively. Instead of the zener diodes 16 and 17, other nonlinear elements can be used, such as the Dinistors. Resistors 18 and 19 provide galvanic coupling between control electrodes and thyristor cathodes 7 and 8. The switching contacts (not shown) of the relay provide the switching of galvanically uncoupled loads.

The generator works as follows.

 If the contacts 12 are in the position shown in the drawing, after the supply voltage is applied, the capacitor 3 begins to charge through the resistor 1. When the voltage is

the capacitor 3 reaches the value at which, through the Zener diode 16 and the control electrode of the thyristor 7, a current flows sufficient to turn on this thyristor, the thyristor 7 opens

Oets. The winding 5 of the relay is thus energized, the contacts No 15 are closed, and the contacts 11 and 12 are opened. After switching on the thyristor 7 almost instantly compared

5 with the switching time of the relay contacts on the diode 9 circuit, the thyristor 7 discharges the capacitor 3.

four

After the closure of the Neither contacts, 015 the capacitor C begins to charge through the resistor 2o. After turning on the Thyristor 8, the current flows through the winding 6 of the relay, and contacts 12 and 15 switch back to the position 5 shown in the drawing.

Subsequently, the process continues until the supply voltage is removed from the generator.

The use of the proposed solution allows the frequency range of the known device to be expanded.

Claims (1)

PULSE GENERATOR by ed. St. No. 493001, on the condition that, in order to expand the frequency range, the output of each BC-circuit through the corresponding diode is connected to the thyristor anode, the control electrode of which is connected through the threshold element to the output of this - RC circuits 1012424 '