Re: Big Caps

[Rich Rudman <rmanzan@TSCNET.COM>]

Toby Basiliko wrote:
>
> 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
Yep I second that Vetco has some sweat Caps Down stairs.. and to the
left... for controller work get the caps with the 1/2 Alum Rod for the
screw mount tabs.. there was 4 @2200 at 200v $19.95 each. TThis is about
1/4 list on this grade cap. They also pass the HEFT test... the heavier
the more Alum foil for conduction. 3 years ago I would have parted wtih
my money for them.
I was there on the 25th

Rich Rudman
--
http://www.manzanitamicro.com

Re: Big Caps