Unidirectional thyristor AC voltage regulation circuit

Published:2011/7/4 1:18:00 Author:Christina | Keyword: Unidirectional thyristor, AC, voltage regulation | From:SeekIC

The unidirectional thyristor AC voltage regulation circuit is as shown in the figure a. The load RL is connected in the AC return circuit, the current which flows through it is controlled by the unidirectional thyristor VS's conduction and cut-off. The AC voltage is rectified and is changed into the unidirectional pulsating voltage UAK, as the figure (1) shows. You can change the AC voltage effective value of load Rl by changing the unidirectional thyristor conduction angle θ to achieve the purpose of alternating voltage regulation. Figure (b) shows one kind of household appliances pressure regulating device, it can be used in the thermoregulation of the electric blanket and the electric iron, also it can be used in the dimming of the table light.



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