Multiphase soft switched DC/DC converter and active control technique for fuel cell ripple current elimination

A method for operating an n phase power converter, comprising:

• a. providing an n phase soft switch DC/DC converter,
• wherein the n phase soft switch DC/DC converter comprises:
• i. a transformer, an input side connected to a power source, and an output side connected to an output filter,
• ii. said transformer having a plurality of primary coils connected to said input side and a plurality of secondary coils connected to said output side,
• iii. wherein each primary coil connects a full-bridge circuit and each full-bridge circuit comprises two switches on two legs,
• iv. said primary coil being connected between said switches on each leg of the full bridge circuit,
• v. each full-bridge circuit being connected in parallel to each other such that each leg is disposed parallel to one another and to said power source, and
• vi. said secondary coils connected to a rectifying circuit;
• b. operating each individual full-bridge circuit with a phase shift in the range l degrees to h degrees wherein l is equivalent to 360 degrees divided by n and h is equivalent to l plus 60 degrees.