Design of phase-shifted parallel-input/series-output dual inductor-fed push-pull converter for high-power step-up applications
نویسندگان
چکیده
A new high-power step-up converter based on the phase-shifted parallel-input/series-output (PISO) modular converter with two dual inductor-fed push-pull converters is proposed. It is operated at a constant duty cycle and the output voltage is controlled with a phase-shift between the modules. It shows an output voltage which is high and linear to the control input, and a low switch turn-off stress resulting in a significant improvement in the efficiency. It also shows low ripple contents, fast dynamics, and low root-mean-square (RMS) currents in the output capacitors. The operation and features are analyzed and the mathematical models are derived. The design guidelines of a closed-loop 50kHz, 400-1200W, 18-30Vdc to 310Vdc prototype and the experimental results are provided to confirm the validity of the proposed converter.
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