Self-adapting process and device for triggering a triac

Details Self-adapting process and device for triggering a triac Self-adapting process and device for triggering a triac

1982-04-23

1985-05-21

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

323239, 323282, H03K 1772

Patent

active

045188670

ABSTRACT:
With a triac placed in series with a load, a threshold detector feeds a modulator supplying a pulse with a given delay with respect to a change of condition of the threshold detector. The output of the modulator is fed through a gate and a monostable flip-flop to the gate electrode of the triac. After the first gate pulse, if the threshold detector detects another voltage rise at the terminals of the triac during a period of time determined by a second monostable flip-flop, this change of condition causes, through an AND gate, the OR gate and the first monostable flip-flop, another pulse to be supplied to the gate electrode of the triac. The result is an increase in the reliability of triggering a triac and reduction in the consumption of the control circuit.

REFERENCES:
patent: 3728557 (1973-04-01), Pelly et al.
patent: 3763395 (1973-10-01), Shilling et al.
patent: 3793537 (1974-02-01), Stringer
patent: 4028609 (1977-06-01), Detering
patent: 4355242 (1982-10-01), Lezan et al.

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