| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply device small in input current distortion and high in power factor. SOLUTION: The power source device has first and second power supply circuits E1, E2 generating mutually different high and low direct current voltages connected to the rear stage of a rectifier DB1 rectifying the alternating current respectively, a drive circuit 9 outputting a drive signal based on the output of an oscillator making the second power source circuit E2 a power source, and a power converter circuit 7 making the power source of the first power source circuit E1 driving a switching element by the drive signal of the drive circuit 9 and outputting high frequency power. Direct current voltage from the first power supply circuit E1 apart from it is applied as energy supplement together with the output voltage of the rectifier DB1 on the input terminal of the second power supply circuit E2. |
