POWER SYSTEM FOR CONTROLLING QUANTITY OF POWER SUPPLIES IN COMPLETE OPERATING CONDITION FOR ENERGY EFFICIENCY

摘要

PROBLEM TO BE SOLVED: To attain higher efficiency of a power supply structured so as to obtain parallel output. SOLUTION: This system includes a plurality of outputs (104, 206) connected to each other in parallel, and controls the quantity of power supplies for supplying current to improve the power supply efficiency of the whole system. If the output current of individual power supplies is lower than a prescribed threshold period, for example, one or two or more power supplies can be set at a standby mode. Thus, the output current of the power supply in an operating mode increases to improve the efficiency of the power supply in an operating mode.