| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a continuous commercial feeding system uninterruptible power supply device which comprises a means for operating a converter only when a power storage means needs. <P>SOLUTION: This continuous commercial feeding type uninterruptible power supply device comprises a DC voltage control circuit for generating a reference current amplitude of the converter, by inputting a DC voltage detection signal for detecting an output voltage of the converter for converting AC of a commercial power supply to DC and a DC current detection signal for detecting the current of a DC circuit; a current control circuit for producing an output voltage command signal of the converter so as to make the current of the converter meet the detection signal from a voltage phase detection signal, for detecting the voltage phase of the AC power of the commercial power supply and the output of the DC voltage control circuit; a gate control circuit for controlling the gate of the switching device of the converter based on a converter output voltage command from the current control circuit; an inverter for outputting the AC by receiving the power from the power storage means in case of service interruption of the commercial power supply; and a charging circuit for periodically charging the power storage means by the output of a timer circuit. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
