| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an uninterruptible power system specialized in a main circuit constitution, which supplies to a load sound input AC voltage as it is, and also supplies to the load the abnormal input AC voltage by converting the terminal voltage of a storage battery to a desired AC voltage. <P>SOLUTION: The uninterruptible power system 10 is constituted of a power converter circuit 11, a booster circuit 12 and a control circuit 13 or the like. When the input AC power source 4 is sound, the Q1, Q2, Q5, Q6 in the power converter circuit 11 perform switching in synchronization with a change in the voltage polarity of the input AC power source 4, while the Q3, Q4 in the power converter circuit 11 perform switching at high frequency, and the booster circuit 12 is turned off. When the input AC power source 4 is abnormal, the Q1, Q2 in the power converter circuit 11 are turned off, while the Q3 to Q6 in the power converter circuit 11 perform switching at high frequency, and the booster circuit 12 receiving the terminal voltage of a storage battery facility 5 is operated to continue the operation of the power converter circuit 11 while supplying output DC voltage to a capacitor C1. <P>COPYRIGHT: (C)2009,JPO&INPIT |
