Photoelectric coupler control thyristor circuit

Published:2011/8/28 21:24:00 Author:Jessie | Keyword: Photoelectric couplers, thyristor | From:SeekIC

In the circuit, if photoelectric coupler' light emitting diodeflows6 ~ 10mA current, the phototriode is connected, then the thyristor is connected, load RL has current; Conversely, nocurrent flows through load. Diode is used toprovideDC power to light activated triode, resistor RVis connected tocapacitor C inseries in order to storage control energyat power negative half cycle. Regulator tube make light activated triode have stable 15V voltage. This circuit's maximum switch currentis 4A, thyristor phase shift angle range is 0~180°.



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