Patent ID: 8154152

Claim:
A method of controlling a DC/DC converter disposed between a first power device and a second power device and including upper and lower arm switching devices and a reactor, comprising the steps of: setting an output voltage of either one of the first power device and the second power device as a target voltage; detecting the output voltage set as the target voltage; and controlling the DC/DC converter by multiplying an error between the detected output voltage and the target voltage by a feedback coefficient to perform feedback control, alternately turning on the upper and lower arm switching devices respectively before and after a dead time so that the output voltage can be equal to the target voltage, detecting a reactor current flowing through the reactor, increasing the feedback coefficient when the detected reactor current is detected as changing across a zero value at which a direction of the reactor current is changed, and performing a hunting suppressing process for reducing the feedback coefficient when the reactor current is detected as undergoing hunting though the target voltage is fixed while the feedback coefficient is being increased.