Many PFC supplies have a boost stage to a higher DC voltage, and 300-400 volts is common. Then there is a switch mode stage (not buck) to provide the galvanic isolation for the desired output voltage(s). (Buck is a non-isolated step down)
Depending on the design of the PFC, some are happy to accept DC, and some aren't. Also, though many supplies will specify 264v as the maximum, they will usually accept higher. The best way to determine if it's safe to try is to check the working voltage rating of the capacitors in the front end. Many are 400v or 450v. If you find that's the case, it should be OK to try up to that rating. YMMV. On Mon, Sep 23, 2024 at 7:52 PM Alan Arrison via EV <ev@lists.evdl.org> wrote: > I have heard some rumors that an active PFC power supply can be used as > a DC/DC converter in an EV. > > However, a typical 96S NCA pack can swing from over 400V to under 300v. > > Can the buck converter portion of the power supply handle that wide swing? > > Can't use the input to the boost converter as that can only handle > 264Vrms = 373Vp. > > Thanks, Al > > > > > _______________________________________________ > Address messages to ev@lists.evdl.org > No other addresses in TO and CC fields > HELP: http://www.evdl.org/help/ > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20240923/167f6b8d/attachment.htm> _______________________________________________ Address messages to ev@lists.evdl.org No other addresses in TO and CC fields HELP: http://www.evdl.org/help/
