I have seen various designs over the years.
Some crude as hell and producing basically a square wave.
A neat design I saw used a Class D chip - LX1725SK - which doesn't exist anymore except on Ebay, but there are loads of new ones. But these will need a BIG inductor as the output filter, which incidentally whistles unless potted.
I also want to avoid a BGA package because they are a pig to prototype and debug.
The original sinewave will come out of a DAC so that's no problem.
I reckon a Class D chip is still the best way today but wonder if there are other ingenious ways.
The load is highly inductive.
Distortion below a few % :)
Any tips appreciated.