Seems to me that the inductance is a variable depending on the rotor speed/position because of the rotor being in motion and thus changing the loading of the stator windings and their inductance. The average inductance would be a factor of the stator winging average inductance value and finally the rest position. so a snubber might well be calculated for the median value. the variable I mention is the basis for a motion sensor called a linear transformer which returns a value that depends on the position of the rotor in relation to the stator. It is very possible that this change might be small and easily done with a means of determining the stator inductance. This was the reason for suggesting a Thyristor rather than a snubber although both should work equally well there is less math/measurement involved in selecting a thyristor.
IMO
Bob