SU370714A1 - ALL-UNION - Google Patents

Description

one

The invention relates to a pulse technique and molset to be used as a relaxation generator in automation devices.

Relaxation pulse generators are known, which contain a time setting Spitch, two discharge circuits made on thyristors with positive feedback on the control circuit, 01 formed diode-resistive circuits, and a pulse transformer. However, when they are used, one-sided biasing of the pulse transformer occurs.

The purpose of the invention is to eliminate the unilateral biasing of a pulse transformer.

For this, the discharge chains of thyristors are connected anti-parallel and, through a capacitor, the time of the driving / C-circuit is connected to the terminals of the primary winding of the pulse transformer.

The drawing shows the principal electrical circuit of the proposed relaxation generator.

The generator consists of an RC circuit containing resistors 1, 2 and capacitor 3 and connected to the winding 4 of a pulse transformer 5 through a thyristor 6 or 7, the breakdown voltage of which is set to the required value using positive feedback formed by strings of diodes 8, 9 and resistors 10, 11. The pulses of the output voltage of the generator are removed from the windings 12 and 13 of the pulse transformer 5. Diodes 14 and 15 ensure the passage of pulses of the required 1 pole 1 of continuity. When an alternating current is applied to the input terminals 16 and 17, each half cycle produces a charge on the capacitor 3. When the voltage across the capacitor reaches a certain value, the thyristor 6 or 7 opens. The capacitor discharges through the winding 4 of the pulse transformer 5. On the winding 12 or 13 pulsed transformer 5 appears output pulse. The polarity of the output pulse is due to the inclusion of diodes 14 and 15. When an opposite half-cycle of alternating current is applied to the cells 16 and 17, the polarity of the output pulse changes.

Subject invention

Relaxation pulse generator containing the time specifying .RC-circuit, two bit chains performed on thyristors

with positive feedback on the control circuit formed by diode-resistive zeros of the kidneys, and a pulse transformer, characterized in that, in order to eliminate the unilateral biasing of the pulse

the transformer, discharge circuits from the CTODOB circuit are connected in anti-parallel and through the capacitor the time of the master / C-circuit of the circuit with the terminals of the primary winding of the pulse transformer.