Patent ID: 8188720

Claim:
A control system for controlling a first phase-leg and a second phase-leg connected in parallel in a DC-DC converter between a battery and a direct current (DC) link, the control system comprising: single current sensor generating a sensor signal indicating an amount of current flowing through the direct current link, including an amount of current flowing through the first phase-leg during a first time interval and an amount of current flowing through the second phase-leg during a second time interval; and controller configured to receive the sensor signal from the single current sensor and generate and transmit a first command signal to the first phase-leg and a second command signal to the second phase-leg; whereby the first command signal controls current flowing through the first phase-leg, and the second command signal controls current flowing through the second phase-leg; wherein the controller redistributes the current between the first phase-leg and the second phase-leg to dissipate unequal amounts of heat in the first phase-leg and the second phase-leg.