An RC circuit as a protective device for semiconductor switches in circuits with resistive or moderately inductive load
Abstract
The behavior of a semiconductor switching arrangement (triac, thyristor) used in a circuit with a resistive or (moderately) inductive load and protected by a series RC circuit shunting the switch is analyzed theoretically. The optimum range of the damping ratio of the switched circuit is predicted, along with the influence of the ratio of load resistance and RC protective device resistance. The results are marshalled against the frequently-held view that optimum circuit protection would require maximum attenuation of the switched load; the deleterious effects of such a practice are argued (too rapid voltage change across the semiconductor switch and consequent damage to the switch).
- Publication:
-
Slaboproudy Obzor
- Pub Date:
- May 1977
- Bibcode:
- 1977SlaOb..38..215C
- Keywords:
-
- Circuit Protection;
- Rc Circuits;
- Semiconductor Devices;
- Switching Circuits;
- Electric Switches;
- Rlc Circuits;
- Thyristors;
- Electronics and Electrical Engineering