On Mon Oct 06 16:21:01 PDT 2014 [email protected] said: >I think I'm going to have to figure out how to water cool my DC-DC. >I built this one using 4 Vicor 20A bricks to get a 80A capable unit. >It all fits on the back of a 6" square 2" thick heatsink with a 6" fan on it. >I'm noticing that when I'm running 40A continuous load, the output starts >becoming erratic. Ther fan on the heatsink doesn't seem to be enough when I'm >drawing a lot of 12V power. (blower, lights, brakes, etc..)
I found at least part of the problem. The bolt on the common 12v ground had come loose. this meant that EVERYTHING had a flakey ground connection, as that is where the battery, accessories, dc-dc, are all tied together. I've also found a bad connection on my 12V Ammeter, so that is part of the reason it was jumping around. Still need to do more testing, as I was noticing that the voltage drop across the fuse on 1 of the 4 Vicor bricks was MUCH higher than the others. (like .5V vs .1v) Fuse didn't blow though. -- Tigers prowl and Dragons soar in my dreams... _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
