| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power factor correction type DC power supply device that measures three points of an AC input voltage, an AC input current, and DC output power, calculates and presumes a DC input current value using such values, and controls a DC output current using a DC input current presumption value. <P>SOLUTION: This power factor correction type DC power supply device calculates and presumes the DC output current using an AC input current measurement value, an AC input voltage measurement value, and a DC output voltage measurement value to control the DC output current to a constant value by correcting the presumed DC output current presumption value by a power conversion loss forecast value. <P>COPYRIGHT: (C)2008,JPO&INPIT |
