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Zero_crossing_switch_with_SCR_slave_configuration

2014-11-12 20:21  
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Zero_crossing_switch_with_SCR_slave_configuration
This circuit provides a single pulse to the gate of SCR Q2 each time that SCR Q1 turns on, thus turning Q2 on for the half-cycle following the half-cycle during which Q1was on. Q2 is turned on only when Q1 is turned on, and the load can be controlled by a signal applied to the gate of Q1. The control signal can be either dc or a power pulse. The SCR used must be capable of handling the maximum current requirements of the load to be driven. The 8-A 200-V SCRs shown will handle a 1-kW load. 2N6397s can also be used in this circuit, and will hands up to 12 A.