| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the following problem associated with parallel systems that auxiliary power supply devices individually carry out voltage control, and output capacities are balanced by detecting a cross current between auxiliary power supply devices or other like, while the output capacities of the auxiliary power supply devices are unbalanced due to load fluctuation, a detector error or the like, and a filter capacitor regenerative current flows from the output side to an auxiliary power supply device which is low in output current through a power conversion switching element, and electric charges are accumulated in an input filter capacitor, thus increasing an input filter capacitor voltage. <P>SOLUTION: A parallel system in which outputs of multiple auxiliary power supply devices are connected carries out control as follows: a filter capacitor voltage is detected; and when the detected voltage reaches a preset condition, an output control command is amplified. <P>COPYRIGHT: (C)2008,JPO&INPIT |
