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. Sure, the charger would still get bigger and heavier, but not by nearly as much as you suggest. Something you and Rich might consider down the road is that it is likely that most customers have a single EV to charge, not a fleet of wildly varying EVs, and will want to mount their PFCxx onboard this single EV; 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. It sounds like demand presently exceeds supply, but at some point you may want to address the portion of the market represented by those unwilling to purchase a PFCxx simply because it lacks isolation (and rightfully opposed to the use of a heavy line frequency isolation transformer with an onboard charger). Just a few thoughts, FWIW... Roger.
