| 摘要 |
PURPOSE:To enable to regulate stably and effectively single phase AC electric power by a method wherein a phase control gate signal proportional to binary coded decimal (BCD) control input signal is supplied to a thyristor. CONSTITUTION:The BCD input signal from a digital apparatus of an electronic computer etc., is inputted to terminals S1-S8 of a BCD input phase control circuit 11, a negative logic BCD code is inputted to pins 4-11 of an integrated circuit IC2, and a phase control pulse is outputted from a pin 18. An integrated circuit IC3 for timer of a monostable multivibrator 12 is triggered therewith, and a fixed voltage is generated between terminals (a), (b) of a resistor R18 in an AND circuit 13 by an output pulse from a pin 3 and an output pulse from the pin 18, and is supplied to the gate of the thyristor. Accordingly a D/A converter becomes unnecessary, and stable and effective control is enabled to perform by addition of the monostable multivibrator and the AND circuit. |
