| 摘要 |
PROBLEM TO BE SOLVED: To obtain a power device which makes it possible to reduce rated capacities when its malfunctioning time is considered, and does not require a complicated interlocking construction for prolonged power supply. SOLUTION: A phase command circuit 29 for generating a reference phase signal P1 is provided, and in each power converter 10 the deviations among units of the phases of the output voltages of power converters are suppressed, by controlling the phase of the output voltage of the power converter 10 of the unit on the basis of the reference phase signal P1. Consequently, it becomes possible to perform parallel operation in which power is supplied to a load with the output sides of the power converters of a plurality of units connected in common, and to reduce the capacity of each power converter to be set considering unit malfunctions. Besides, a complicated interlocking constitution for prolonged power supply becomes unnecessary also. |
