| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply regulator in which fluctuation of a commercial power supply can be minimized when power is turned on for an apparatus connected with the commercial power supply by increasing the inrush current of the apparatus gradually from a low level. SOLUTION: The power supply regulator incorporating a unit generating an inrush current temporarily upon power supply comprises load lamps 4, 5 being supplied with power from an AC commercial feeder line 1, switching elements 6, 7 connected in series with the load for the commercial feeder line 1, a circuit 9 for detecting the zero-cross point of the AC commercial feeder line 1, means for delivering a firing signal to the switching elements 6, 7 upon elapsing a predetermined time after a zero-cross point signal is detected through the zero-cross detection circuit 9, and an operating means for subtracting a predetermined amount from the time for firing the switching element after zero-cross point sequentially every half cycle. |
