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Is your Darlington power section modeled after BlackPanther's?
If so, what are you using for your 5 volt supply?
It would need to source 20 constant amps and also be isolated from the
other voltage sources and ground.
BlackPanther used a PSU from a desktop computer, driven via a 12v inverter.
Just be aware that they are not always isolated though.
In relative terms, we're talking about a 100 watt DC-DC converter here.
When you drive FETs and IGBTs, you hit them with a pulse of current, so
a similarly rated single IGBT module can be driven using the 6 watt
DC-DC converter that is included on the Revolt control board.
You've learned your lesson on fusing. Check with CTR-surplus.com
They will probably have a semiconductor rated 300 amp fuse for $10 or less.
As JackBauer noted, most of them are capable of breaking tens of thousands
of amps of DC current due to shorting. They are just what we want!
As a practical note, we should fuse every single wire that runs from power.
Even if we are only powering a small indicator or such.
It is cheap fire insurance!
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