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
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|
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| 0 |
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| 0 |
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SU1567797A1 |
