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Old 01-02-2009, 07:32 PM   #90 (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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Communism...

Oh Snap(ping turtle), you're right. Plan B: Everyone else work, and I lay back and take it easy!

We got 4 50 Ohm 10watt resistors from radio shack. I'm going to wire them in parallel to get a single 12.5 Ohm 40watt precharge resistor. I'll take the oscilloscope to the garage to see the shape of the PWM signal through the mosfets from drain to source? I have never thought about how to do it, or maybe from gate to source? Or gate to drain? hehe, how about all of them to see what happens. Hopefully the voltage spikes on the transitions from the mosfets being off to being on aren't too big. They need to stay below the 100v max.

I don't think I'll hyper-analyze and optimize the bike version too much, because the car's version will be pretty different as far as how the power board is laid out. I think for the car version, we'll definitely do maybe 1 mosfet at a time to make sure everything is working right, since those 200v monsters are expensive!
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