John Lussmyer via EV wrote:
I have my F-250 back on the road after some (long drawn out, time wasted)
repairs to a motor terminal, and rebuilding the transmission. (and exploding
a contactor...) I'm getting some really WEIRD results with my DC-DC. (ok,
power supply) It's capable of 50A output, and is set for about 14v output.
When I start the truck, it zooms up to around 50A for a few seconds (probably
trying to top off the weak 12V battery), then gradually drops down to 25A or
so for the trucks basic needs. All this time the voltage sits at around
13.9V.
Then I start driving, as I have the Zilla start pulling significant power -
the DC-DC output voltage drops, sometimes as low as 11v. The REALLY REALLY
weird bit is that it's still only supplying 25-30A. If I take my foot off the
pedal, the voltage shoots back up to 13.9v.
Check the pack voltage going into the DC/DC. Maybe it is sagging, so the DC/DC
goes into "brownout".
--
I look for what needs to be done. After all, that's how the universe
designs itself. -- R. Buckminster Fuller
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com
_______________________________________________
UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
http://lists.evdl.org/listinfo.cgi/ev-evdl.org
Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
