Peri Hartman via EV wrote:
You wouldn't even need a central instruction. It could be the same V2G
electronics, but only one way. That is, when there's a dip in voltage
charging decreases. The bigger the dip, the more the charge shuts down.
I suppose it could also react to spikes and absorb extra current for a
But it wouldn't put anything back into the grid.
Frankly, I think the quest for "perfect power factor 1.0" chargers is a
waste of time and money (in America, at least). *Nothing else* in our
homes is power factor corrected. No one is trying to impose extra cost
and mandate 1.0 PF for anything else. Everyone would holler!
I think a better solution would be to make a charger that *compensates*
for the power factor of the home as a whole. That is, since most home
devices have a lagging power factor (motors, light dimmers), and draw
excessive current at the peak (anything with a switchmode power supply),
then make the charger has a leading power factor and draw its peak
current *away* from the peak. This can be as simple as a "bad boy"
charger with series capacitors instead of the usual resistive or
inductive current limiter.
Such a charger won't just have a "do no harm" effect; it will *improve*
the power factor of the house!
All children are born as engineers. Watch them at play. They're not
just playing; they're building and learning. They are engineering.
Then we get them in school and spend years squashing it out of them.
-- Geoffrey Orsak, Southern Methodist University dean of engineering
Lee Hart's EV projects are at http://www.sunrise-ev.com/LeesEVs.htm
For EV drag racing discussion, please use NEDRA