[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Recent s.s.t.c work



Original poster: Steve Conner <steve@xxxxxxxxxxxx>



Interesting...what's the squiggle, I wonder?

Well, the primary current was flowing in the anti-parallel diodes from the switching instant up until the squiggle. So I'm guessing the squiggle is the recovery transient of the diodes, as the current stops flowing in the diodes and starts flowing in the IGBTs. Unless it's an IGBT switching when it shouldn't and causing arm shoot-through. To be more certain I'd want to check the gate voltage of one IGBT alongside the bottom trace.


I'm impressed by the output from your scope camera :-o

Steve Conner
http://www.scopeboy.com/