Rotoverter: RV Resonance Recovery Test Circuit - Half Diode Plug Across Run Cap
C1 is shown as 36uF as optimised to my particular motor. The normal range is around 17-24uF for normal RV operation.
The values C2 and C3 can be increased with experiment to see when the resonance is killed and the diode plug begins to draw increased load from the RV.
SOME GENERAL POINTS: