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Old 11-30-2011, 09:10 PM   #5234 (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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HI Ben! If we make it a book, we should cut out the naked North Korean Dictator. I can't remember what page it's on, but that was nasty.

Hi Amin! I'm SOOOOOOOOOOOOOO glad it's working!! I can officially breathe again.

Hey! I'm going to do some thermal tests on some lower end diodes. They are rated for 300v, and 60amp per leg. I'm officially a professional at soldering TO-247 package mosfets/diodes to heavy duty bus bars now. And I don't think the thermal stress is too much. They still work just fine after their backs are soldered to the bar and they aren't at solder temperature for very long. It takes a hammer poundind a flat head screwdriver against it to remove them, and that's only after the outer black plasticky part has been completely destroyed. Seriously about 30 pounds with a hammer really hard before I can break the copper back of the mosfets/diodes from the copper bus bar. Those things aren't going to "wiggle" loose. haha. It took a whole bunch of different approaches to get it just right, and the process keeps getting smoother!

For 1000 amps, I need about 84 motor amps from the cheap diodes, which are rated for 120 amps average. In bulk they are only like $3-$4 each I think.
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