MULTI-PARALLEL ZERO-VOLTAGE SWITCHING FULL BRIDGE DC-DC CONVERTER AND CONTROL METHOD THEREOF CAPABLE OF ALTERNATIVELY TURNING ON/OFF FIRST AND SECOND SWITCHES OF THE SAME LEG

摘要

PURPOSE: A multi-parallel zero-voltage switching full bridge dc-dc converter and control method thereof are provided to offset a circulation current in a free-wheeling section, thereby reducing conductive loss. ;CONSTITUTION: First switches(Su1,Su2,Su3,Sum) are connected to the positive terminal of an input voltage. Second switches(Sd1,Sd2,Sd3,Sdm) are connected to the negative terminal of a DC input voltage. A controller(610) controls on/off about a first switch and a second switch. High frequency transformers(T1,T2,T3) induce the current and voltage of the primary side to the secondary side by the opening/closing operation of the first and second switches.;COPYRIGHT KIPO 2011