Big Caps

[Toby Basiliko <toby@WOLFENET.COM>]

Oy, Seattle area EV'ers,
Just went to Vetco, and they had some big 200v 12,000 mfd (I think) caps
for pretty cheap.  They were recent date code, and looked unused.  I
think they wanted $15, which seemed a deal.  BTW, they were about 3"dia
x5" high, and probably weighed 3-4 Lbs, for those of you who were
comparing battery to capacitor energy densities.
Vetco's on 13029 Northrup way in (Redmond?Bellevue?) and in the phone
book...425-869-7025
Don't electrocute yourselves,
Toby

Bill Dube' wrote:
>
> >Heres another scheme that is working for me - I set up the Todd with a =
> >
> >40,000uF 25VDC capacitor on the output instead of a battery.  The Todd
> >runs all the time, and as pointed out by John Wayland, it draws only
> >milliamps when the car is "off".  The capacitor holds up the 12V dc syste=
> >m
> >when large loads are suddenly turned on, like headlights.  The Todd
> >compensates for load changes fairly quickly, allowing the system to
> >function without dropouts.  It won't work however, if you have a load whi=
> >ch
> >draws more current than the Todd can deliver, like power steering!
> >One less battery to worry about.
>
>     It's nice to have flashers if the car breaks down. It's also nice to
> have headlights for a few minutes if the DC-DC craps out. I like having an
> accessory battery in my EV for these reasons.
>              _   /|
>              \'o.O'              Bill Dube'
>            =(___)=           bdube@boulder.nist.gov
>               U
>
> Re: about DC-DC converters
Big Caps