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Can you achieve a high power factor using a buck regulator followed by a boost regulator? I agree that boosting the voltage up to something like 350V only to drop it back down to 160 or so doesn't really make sense...however I haven't seen an example of a power factor correction circuit that is not a boost converter.
From my understanding of SCRs: they work by distorting the current waveform from sinusoidal into a sine wave with the first X degrees set to zero. If this is true, the result would be a charger with a low power factor (ie: paying for peak current and getting only a low RMS current into the battery pack).
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