SU493001A1 - Pulse generator - Google Patents

Description

(54) PULSE GENERATOR

one

The invention relates to automation and I pulse technology.

Known pulse generators of infra-low frequencies, containing two integrating circuits and a trigger, made5 on thyristors and relays.

However, the known generators have insufficient f reliability and high energy consumption due to the fact that one of the 10 arms of the trigger is constantly under voltage.

The aim of the invention is to increase the reliability of the generator and reduce the energy consumption, as well as expand the frequency range.

For this purpose, a winding polarized relay is installed, the windings of which are included in the anode circuit of the thyristors and connected to the connection points of the resistors of the RC circuits with the corresponding switching 20 contacts of the electromagnetic relay; resistors integrating RC - shunt. us diodes. .

Such a construction of the scheme makes it possible to reduce the amount of eleg-j j used in it.

 cops, including mechanical coaxial pairs of relays, which leads to an increase in generator reliability. In addition, the current through the relay coil flows only during the discharge of the capacitance, which occurs much faster than the formation of a pulse, which causes a decrease in the power consumed by the proposed generator as compared to the known pulse generators.

The drawing shows the electrical circuit of the generator.

The pulse generator contains two YAS integrated circuits, consisting of resistors 1, 2 and capacitors 3, 4, a polarized relay with windings 5, 6, and thyristors 7, 8. Resistors 1, 2 are bypassed with diodes 9, 1 O for the discharge of capacitors 3 4. The resistor 1 and the winding 5 are connected to the opening contact 11, and the switching contact 12 is connected to the power bus 13.

Resistor 2 and winding 6 are connected to the closing contact 14, and the switching contact 15 is also connected to the power bus 13. The control electrodes of the thyristors 7, 8 are connected to the elements 1, 3 and 2, 4 via stabilizers 16, 17, respectively. Instead of zener diodes 16, 17, other nonlinear elements can be used, for example, dynistor. Resistors 18, 19 provide a gavian connection between the control drives and the thyristor cathodes 7, 8. The switching contacts 20, 21 are connected to the output circuit of the generator. The generator works as follows. If pins 12, 15, 21 are in the position shown in the drawing, after the supply voltage is applied, capacitor 3 will begin to charge through resistor 1 when the voltage on capacitor 3 reaches the value at which through zener diode 16 and the control electrode of the thyristor 7 will flow a current sufficient to turn on this thyristor, the thyristor 7 will open. The winding 5 of the relay will then be under current, contacts 14, 15 will close, and contacts 11, 12 and 2O, 21 will open. After switching the contacts 12, 15 and 21, the discharge current of the capacitor 3 will flow through the winding 5. After the opening of the contacts 2O, 21, the formation of the impulse stops and a pause begins. When the discharge current of capacitor 3 is reduced to the value of the switching off current of the thyristor 7, it closes and the final discharge of capacitor 3 will occur through the resistor 18. However, after closing the contacts 14, 15, the charge of the capacitor 4 through the resistor 2 starts. On the transistor 8, the current will flow through the winding 6 of the relay and the contacts 12, 16, 21 switch back to the position shown in the drawing. In a further process, it will continue until it is removed from the power supply generator. The use of a double-winding polarized relay, the windings of which are connected to the anode circuits of the thyristors and connected to a power source via respective switching contacts, causes the use of the energy stored by the capacitors to maintain the current through the windings disconnected from the power source. The subject of the invention 1. A pulse generator containing two integrating circuits, a trigger made on an electromagnetic relay and two thyristors, the control electrodes of which are connected via threshold elements to the outputs {(J-circuits connected by resistors to the power source h & switching contacts of the electromagnetic relay characterized in that, in order to reduce power consumption and increase generator reliability, it uses a double-wound polarized relay, the windings of which are included in the anode circuits of the thyristors and connected to the points of connection of the resistors of the COP - circuits with the corresponding switching contacts of the electromagnetic relay. 2. The generator according to claim 1, characterized in that, in order to expand the frequency range, the resistors of the integrating YAS circuits are bypassed with diodes.

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