AC voltage controller circuit using unidirectional thyristor

Published:2011/11/30 20:10:00 Author:May | Keyword: AC voltage controller, unidirectional thyristor | From:SeekIC

This circuit uses two unidirectional thyristors connectedinversed and in parallel to realize AC voltage adjusting forload RL. Trigger circuit's AC voltage is added to anode Ga of silicon controlled switch BRY39through rectifier bridge and R3,and the voltage regulator tube is used tolimit Ga's voltage oncathode being not more than 18V. When charge voltage on C ismore than this value, BRY39 will be breakover, capaciotr C discharges through transformer's first winding toform thyristor trigger pulse.Transformer winding data:first winding turns: n=39 , 0.4mm copper enameled wiresecondary winding turns: 2×n=13 , 0.6mm copper enameled wireisolation voltage between windings and iron core: 5kV



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