Quote:
Originally Posted by isaac_alaska
I was thinking something like this, it seemed that with really high currents it would be hard to cram enough copper into a 1/4 inch thick bar that was laying flat, without coming pretty close to each other. Looking at it now though it looks like it will all fit.
i was thinking of making the bars only as wide as the terminals on the IGBT's, and then making them taller to make up for the reduced width and still get the same copper cross sectional area. probably just added weight though... |
A 1/4" x 3/4" bus bar is good for about 35A continuous with a 30 degree C rise in temp. The same size bar is good for 500A continuous with a 65 degree C rise.
Even the 1kA controller will not run at more then 350A continuous, and peaks like acceleration will not melt the bars or anything.
Here's a chart that might help a bit.
Ampacity Chart for Copper Bus Bar
-Adam