Triac governor circuit

Published:2012/9/18 1:48:00 Author:Ecco | Keyword: Triac governor | From:SeekIC

The motor M and TRIAC VS are connected in series, if changing the conduction angle of the VS, the AC voltage applied to both ends of the motor M can be changed to realize stepless speed adjust in the range of 0 ~ 220V. General Triac trigger circuit is more complex with a lot of components. The circuit shown in figure only uses a potentiometer RP to achieve speed control purposes. It uses equipotential trigger circuit , i.e. whether it is a positive trigger or a negative trigger, the control electrode G and the potential of the cathode of T2 are the same. This circuit can be used the governor in fan, incandescent dimmer or other household appliances.



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