| 摘要 |
PURPOSE:To obtain substantially constant voltage adapted for a controller with a simple circuit by obtaining the power source voltage of the controller from a turning OFF capacitor in a power source of a blocking oscillation type. CONSTITUTION:A power source in which a switching transistor TR1 is connected in series with the primary winding N1 of a converter transformer 2 and controlled by a blocking oscillation type, a circuit 6 for a turning OFF capacitor C1 charged when the transistor TR1 is OFF and a thyristor SC for turning OFF the transistor TR1 are provided. A controller 5 for controlling output voltages V1, V2 is provided in the gate circuit of the thyristor SC. A power source voltage for operating the control transistor TR2 of the controller 5 is supplied from the capacitor C1. |
