| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply circuit in which the driving time (driving rate) each of a plurality of power converting circuits can be altered easily through a simple arrangement, and an output is not stopped but can be supplied stably from a power convering circuit on the normal side automatically even when the plurality of power convering circuits are driven alternately under a state where one or more of them are out of order. SOLUTION: In the power supply circuit where a plurality of power converting circuits 5 having a power converting switching element 19 performing on/off operation by receiving a DC voltage are provided on the primary side of a common transformer 1 and a secondary side DC output circuit 3 for supplying power from the plurality of power converting circuits 5 and 6 to a load 2 is provided on the secondary side of the transformer 1, the plurality of power converting circuits 5 and 6 are provided with step-up circuits 9 and 10, respectively, and a plurality of step-up circuits 9 and 10 are connected with a load balance control signal generator U for outputting a load balance control signal. COPYRIGHT: (C)2005,JPO&NCIPI
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