This is for a two speed motor. If you were doing a mod, you would just ignore the low speed motor and use the High speed motor with a drive. I don't think it would be too hard to put a VVVF drive and circuitry to drive the unit. Do you have the rest of the prints for the elevator? The reactors could be replaced with starter grids. A good motor man could guesstimate the reactance of the motor and size the grids.