Roger Stockton wrote: > > Joe Smalley [mailto:[EMAIL PROTECTED]] wrote: > > > No. The PFC-20 does not have a transformer. If it did have > > one, the charger would be 2.5 times as tall and would weigh > > 100 pounds instead of 22 pounds. > > Not if the isolation were provided by a transformer operating at the > switching frequency instead of line frequency .... > for those users, including the HF isolation transformer even if it meant > changing the topology so that the super-wide output voltage range had to > be restricted (e.g. 12-96V, 80-156V, 144-400V models) would probably be > a more than acceptable tradeoff. ... > Roger.
This is exactly how expensive Brusa chargers are built. An I suspect, its HF isolation transformer is the reason why it cannot put quite as many Amps in the pack at low AC input voltage (120VAC) as PFC can. Victor
