POWER SUPPLY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a power supply device with high efficiency.SOLUTION: A power supply device 1 includes: a bidirectional DC-DC converter 3 for outputting a DC link voltage Vlink by inputting a main battery 5; and an insulation type DC-DC converter 4 for supplying a load 7 with power by inputting the link voltage Vlink. The link voltage Vlink, which is an output of the bidirectional DC-DC converter 3, changes in accordance with an output voltage of the insulation type DC-DC converter 4.SELECTED DRAWING: Figure 4