Victor Tikhonov wrote: > I'm ordering Brusa chargers and trying to determine what the > output voltage range would be most useful. > > There are four ranges and probably three will be most wanted: > > 1. 130V...260V output (@ 25A max for single unit) > 2. 180V...360V output (@ 18A max for single unit) > 3. 260V...520V output (@ 12.5A max for single unit).
> My guess, most could be using option 1 or 2. > > For start I will stock just one kind, so which one? Well, Brusa states that (1) is good for PbA packs of 120-204V, (2) for packs of 168-288V, and (3) for packs of 228-396V. Option (1) would cover most of the DC crowd and (3) would cover the AC crowd. (2) just doesn't go high enough to cover the full range that an AC system such as you offer can handle, so why bother with it? If you were to carry just one model to start with (3) seems to make the most sense since it nicely complements the AC drive systems that you offer (no point selling telling someone that they really ought to use 300V+ with the inverter for best performance but only carry a charger good for 288V packs). Finally, the Brusa data sheet contains a footnote indicating that full output current is usable down to 0V output (the stated output voltage range is that over which the full rated output power is available), so there is little need to carry a lower voltage model in the short term since (3) can in fact handle packs of 0-396V at 12.5A. Add the lower voltage model if/when you actually get interest from low voltage users who want the higher current capability it offers. Cheers, Roger.
