| 摘要 |
FIELD: electronics.SUBSTANCE: invention relates to electronic switch circuits and can be used for switching AC high-current circuits. Said results are achieved due to that thyristor control circuit includes an RL-voltage divider with variable inductance, consisting of a resistor, which is a spark protection limiting element, and primary transformer winding, which is a galvanic isolation element of power and spark protection circuits, wherein secondary winding is shorted.EFFECT: technical result is providing spark protection of a microswitch circuit, obtaining required thyristor drive current drop with low power in microswitch circuit, creation of isolation of power and spark-proof circuits, simple circuit and higher reliability.1 cl, 1 dwg |
