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Old 10-21-2010, 10:05 AM   #3884 (permalink)
wakinyantanka
Custom EV Builder...
 
Join Date: Jul 2009
Location: Ohio
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Quote:
Originally Posted by MPaulHolmes View Post
Sorry, I was away getting pinewood derby supplies for my 3 year old. "He's" going to enter the competition on Nov. 20th. hahaha.

I'm using 10 stth6002c diodes.

If you use a diode and resistor in series, the mosfet drain voltage will pulse MUCH higher than if you don't have a resistor in series with the diode, assuming paths are already at a minimum length. I also simulated that, but I haven't posted it. With a resistor it was 300v at the mosfet, and without the resistor it was about 140v at the mosfet.

I think your layout is the reason you are observing different results. I think you should have each diode/capacitor/mosfet loop as small as possible, because that loop has the fastest changing current on it. Everything else is a slop fest.
Hey Paul,
Your knowledge on this is simply astounding.
If may pick your brain a little, how does the SR controller handle these spikes and singing?
Thanks for all you do here.
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