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Old 09-13-2010, 08:51 AM   #31 (permalink)
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electrowizard, great to see you have it all working now and looks like you learnt a lot on the way. Switching 380 amps is impressive for any electrical design.

Hope your looking forward to your next electrical challenge

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Old 03-29-2012, 09:45 AM   #32 (permalink)
Deyan Stoev
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How exactly do you increase dt?

Hi to everyone in this wonderful forum!!!

It is an old thread with solution, which is not really obvious to me...

Originally Posted by electrowizard View Post
Hey guess what? My controller no longer blowing mosfets!!!

The only thing we can change is dt, the time to switch. I have increased it to 200ns. The theoretical inductance needed to fry my mosfet is now 60nH.
So, electrowizard, how exactly do you increase dt - by adding 100 om gate resistance?

Thank you in advance!

P.S. I'm on 378-th page of the thread "Open ReVolt: open source DC motor controller" and still reading that marvelous guide!

Last edited by deodeo; 03-30-2012 at 04:07 AM..
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Old 03-29-2012, 06:35 PM   #33 (permalink)
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"Congratulations upon your success!"

As a retired-EE, I can definitely empathize with you and your problem. Turning voltage or current ON and OFF at high rates is always a headache, even when it's NOT power, but just signal-levels that are being switched!

Today's giga-Hertz computer board traces aren't designed, they're RF-traced, as constant imedance (Z) antennas!

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