Automatic current shaper with fast output regulation and soft-switching

A new utility-to-DC, harmonic-free interface combines the functions of automatic input current shaping, fast output voltage regulation, and lossless, soft switching in a single power converter. This was made possible through internal energy storage and the discovery of new modes of operation, which together, effectively decoupled the input boost-like part of the Cuk converter from its buck-like output. Experimental results obtained on a 50 W-12 V prototype confirm the fast output regulation (30 kHz bandwidth for 100 kHz switching frequency) simultaneously with low-harmonic line current waveforms.<
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