| 摘要 |
PURPOSE:To apply a zero voltage ignition method without regard to the difference of output circuit and the half-waves and full-waves of voltage applied by a method wherein proper currents are supplied to a base and a collector of a transistor in response to the change of line voltage. CONSTITUTION:A load power source 3 is introduced to terminals O1, O2 through load 4, and output SCR1 is connected to the terminals O1, O2. Voltage between the terminals O1, O2 is rectified by means of a diode D1, and fed to a collector of a transistor T1 by a series circuit of a capacitor C1 and a resistor R1 and to a base of the transistor by a resistor R2, and the collector of the transistor T1 is connected to a gete of the SCR1. A phototransistor T of a photocoupler is connected between the base and an emitter of the transistor T1. A luminous diode D of the photocoupler is connected to a DC power source E through a resistor R5 and a switch S. |
