Patent ID: 7054175

Claim:
A DC—DC converter comprising: n groups of inverter units provided with respect to a DC power source, the inverter unit having a pair of conversion circuit parts for converting a power source voltage of the DC power source into an AC by switching elements of a full bridge configuration and a pair of transformers A and B whose primary sides are respectively connected to outputs of each of the conversion circuit parts and whose secondary sides are respectively connected to inputs of a pair of rectification circuit parts, wherein the secondary sides of each transformer A in the n groups of inverter units are connected in series via a wire and also wherein the secondary sides of each transformer B in the n groups of inverter units are connected in series via a wire, and further wherein output shares of the connected transformers A are equalized with the output shares of the connected transformers B when output voltages of the conversion circuit parts, to which the transformers A and B are connected, are different.