Have you measured the temp on any of the units? It is possible that one
of the bricks is not behaving. Failing that, you might want to redo the
heatsink with some serious extruded aluminum.
Cheers!
On 10/6/14, 4:21 PM, John Lussmyer via EV wrote:
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..)
--
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