| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an uninterruptible power supply system which can raise reliability of the system by preventing the fault of an inverter power source, and also preventing a power ripple to a load. <P>SOLUTION: This system has a plurality of uninterruptible power systems (1 and 2) which supply power by switching inverter power sources (11-14 and 21-24) each converting a DC into an AC and bypass power sources (10 and 20) of commercial power sources or the like by first switches (15 and 25), and this is equipped with synchronization control means (30A and 40A) which mutually synchronize outputs of the uninterruptible power systems when supplying power by switching the uninterruptible power systems by means of a second switch (51). In this case, the synchronization control means is provided for every uninterruptible power system, and synchronizes the output of the inverter power source in its own system with some one bypass power source in a plurality of the uninterruptible power systems or the output voltage standard of a self-travel mode. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
