Two-way thyristor AC voltage regulation circuit

Published:2011/7/4 1:31:00 Author:Christina | Keyword: Two-way thyristor, AC, voltage regulation | From:SeekIC

The two-way thyristor AC voltage regulation circuit is as shown in the figure. Because the thyristor is working in the AC circuit, both of the positive and negative phases can be conductd, so the main circuit is more simple than the unidirectional thyristor regulation circuit. Also you can change the conduction angle to achieve the purpose of regulating. The light regulation desk lamp circuit which uses the two-way thyristor is as shown in the figure. When the switch S closes, the AC city electricity charges the capacitance C2 through the incandescent bulb, L, RP and R. When the voltage of C2 increases to the conduction voltage of the bi-polar tube, the VD conducts to trigger the two-way thyristor to conduct.



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