Patent ID: 8222763

Claim:
A method of controlling a DC/DC converter apparatus including a DC/DC converter connected between a first electric power device and a second electric power device, and having an upper arm device and a lower arm device; and a controller having a calculating unit and an operation command unit, the calculating unit calculating connection periods of the upper arm device and the lower arm device, and a dead time provided before connection of the upper arm device, the operation command unit alternately turning on and off the upper arm device and the lower arm device with the dead time provided therebetween, based on a calculation result of the calculating unit, the method comprising the steps of: in a permission judging unit of the calculating unit, determining, in a current calculation process, if the connection period of the lower arm device exists; when it is determined that the connection period of the lower arm device exists, prohibiting, in a next calculation process, decreasing the dead time provided before the connection of the upper arm device; and when it is determined that no connection period of the lower arm device exists, permitting, in the next calculating process, decreasing the dead time provided before the connection of the upper arm device and increasing the connection period of the upper arm device.