Various aspects of home brew inverters

Author	Message
Tinker Guru Joined: 07/11/2007 Location: Australia Posts: 1904	Posted: 11:22pm 27 Mar 2017         poida said   Maybe a good approach to inverter design would be: 1 select matched FETS, tested as good and well suited for parallel use 2 figure out the gate charge and driver current needed to get sensible switch speeds 3 verify adequate dead time 4 verify ringing on gate or drain or source is small enough to live with 5 ensure little or no dV/dT turn-on, and other parasitic issues Once these are sorted, only silly overload mistakes should kill the mosfets. What other failure modes are there? No 3,4 and 5 will need a decent digital storage oscilloscope. Yeah right, but we don't have a decent digital storage CRO. And, buying an off the shelf inverter might turn out to be cheaper So it's left to experimenting, at least for this tinkerer. I could blow up an awful lot of Mosfets for the price of that fancy scope. Thanks for the gate resistor thing, I try to experiment with that for a bit. Not bored with it yet but have to slow down a bit to catch up with neglected house chores Klaus