TRIAC_ZERO_VOLTAGE_SWITCHING

Published:2009/6/25 21:55:00 Author:Jessie | From:SeekIC

The triac will be gated on at the start of the positive half cycle by current flow through the 3 μF capacitor as long as the C103 SCR is off. The load voltage then charges up the 1 μF capacitor so that the triac will again be ener-gized during the subsequent negative half cycle of line voltage. A selected gate triac is required because of the triggering mode.



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