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Hi Mark,
I see what you mean now, I read your other post wrong. I would do what you suggest and add in 500A sections. I might do a 3 fet design to be able to add in 200-300A sections. The only problem might be heat-sink and even more buss bars. I have an idea about how to expand the heat-sinks, and even the B+ and B- buss bars, but I cannot think of how the M- bar could be expanded without getting in the way of the heat-sink. I think that it would need to be replaced with one designed for X number of power module's. It would also leave a problem of the cover. I think I could draw up something that could have flanges on it and it would screw together to create a box. It would have to have end ones still, but i guess that would be in the basic controller.
-Adam
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