| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve a power factor by performing multiphase control even if there are differences among output voltages of a plurality of PFCs. <P>SOLUTION: A power-supply device includes a main adjustment circuit and sub-adjustment circuits that adjust a power factor, and a control circuit that controls respective output voltages using switching elements included in the main adjustment circuit and the sub-adjustment circuits. The main adjustment circuit and the sub-adjustment circuits each includes: an input voltage detection section that detects an input voltage obtained from a rectifier circuit of an AC power supply; an output voltage detection section that detects the respective output voltages; and a current detection section that detects a current flowing through the switching element. The control circuit includes a switching control section that outputs switching signals to the switching elements according to the detection results from the output voltage detection sections and the current detection sections. <P>COPYRIGHT: (C)2013,JPO&INPIT |
