Compensating resonant converters

I had a question regarding the compensation of a resonant converter be it a resonant inverter or a half/full bridge converter that has DC output voltage or any of the ZVS/ZCS half wave or full wave QR or QSW converters that we studied in class. How do we go about compensating such converters? Is a typical PID controller enough like the one we studied in intro to Power electronics? Or is there something additional required? Any tips and references are appreciated.

How to find jm1 for active clamp forward?

I'm stuck as I can't seem to get an expression for jm1 for the active clamp forward.