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Old 04-17-2009, 11:11 AM   #959 (permalink)
MPaulHolmes
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Join Date: Feb 2008
Location: Maricopa, AZ (sort of. Actually outside of town)
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Michael's Electric Beetle - '71 Volkswagen Superbeetle 500000
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Calling all people to improve power section layout so as to allow for through-hole soldering of mosfets/diodes!

Right now, with 2 sided PCB, if I were to drill through to the other side, and attach the legs of each mosfet and diode to it's own little island, it would be a bottleneck on the capacitor track side. I'd be eating up real-estate over there! At this point I plan on bending the legs so the expansion and contraction applies stress mostly to the legs rather than the solder joints. And if you want to get out the big guns, slather (I love that word! hahaha!) the solder joints, all the way up to (0.2 inches away) the bus bar! I'll bet you $10000000000000 it won't pop loose! I don't think cooling would be a huge issue, with a huge copper bus bar 0.2 inches away, and the solder connected to 4 or 6 ounce copper.

Note: The "Power Wheel" is patent pending, and attaching the legs with screws has its issues as well.
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