Abstract
A
high-efficiency digital-controlled interleaved dc-dc converter is
designed and implemented to provide a regulated high
voltage output for high-power proton-exchange-membrane fuel-cell applications. Ripple
cancellation on input current and output voltage can be achieved by the studied
interleaved dc-dc power
conversion technique to reduce hysteresis energy losses inside the fuel-cell stacks and meet
battery charging considerations on the high-voltage
dc bus. An active-clamped circuit is also used to reduce the voltage spike on
the power switches for
raising the system reliability. The operation principles and the design
considerations of the studied power converter are analyzed and discussed in detail. Finally, a
10-kW laboratory prototype is built and tested. The experimental results are
shown to verify the feasibility of the proposed scheme.
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