Extreme High Voltage: SassyClassE SSTC: Overview and Demonstration
I dusted off the SassyClassE sstc for some experimentation, so I thought I’d do a “show and tell” of its components and operation.
Erratum: It’s either efficient, or it’s not. At around 8 minutes I say that the Class E operation is pretty efficient, and then a bit later I say that the system as a whole isn’t. This isn’t really a contradiction; the ClassE switching wastes very little power in the mosfet itself, but the system overall wastes power in heating the secondary, radiating RF and making ozone.
I originally used an IRFP450 but last night I tried the higher-current IRFP460 and it is a bit easier to tune the gate bias with that transistor, so I left it in place for this set.
The basic ClassE driver schematic that I used is here:
I’ve never run higher than about 60 volts input though, because I can’t find a 17n80 mosfet in my box.