| 摘要 |
PROBLEM TO BE SOLVED: To suppress the voltage ripple that may cause the flickering of an illuminator, concerning a power unit which suppresses the voltage ripple on the side of an AC power source (distribution line). SOLUTION: This power supply unit comprises a rectifying circuit 2 which rectifies AC voltage, a converter 5 which supplies a switching load apparatus 6 with the rectified output voltage of this rectifying circuit 2, a boost converter 3 which boosts the rectified output voltage of the rectifying circuit 2 prior to charging a capacitor C1 in the operation-off period of the switching load apparatus 6, a discharge circuit 4 which discharges the charge of the capacitor C1 to the side of the converter 5, in the operation-on period of the switching load apparatus 6, and an ON/OFF controller 7 which controls the start and stop of the action of the boost converter 3 and the discharge circuit 4. COPYRIGHT: (C)2005,JPO&NCIPI
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