Low power supply voltage thyristor control circuit

Published:2011/8/28 21:34:00 Author:Jessie | Keyword: Low power supply voltage, thyristor | From:SeekIC

This circuit's power supply voltage is 12~16V, it can be used in low pressure vessels such as toy train. It makes S566B as trigger circuit to generate control thyristor's connection. DC power is supplied by rectifier voltage circuit, R1 is the step-down resistor. The role of transistor T1 is to reduce control dead zone. Because this circuit's load current is so low, it can be connected a 1~2W bulb to make the Bi-directional thyristor current higher than the maintaining current. Because the transformer power output is small, when the Bi-directional thyristor is connected, transformer's leakage is equal to big series resistor, which can cause short-term voltage stopped, and it should be connected the capacitor C4 in series.



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