Nothing to absorb, there are two individual fields on a duo-voltage motor. You have the main winding and the auxiliary winding. When one is positive the other is negative when running at 220v. On 110v only the main winding is used for power.
All windings are active regardless of the voltage, there is not a primary, and auxillary. All windings run at 120V regardless of the supply.
If only half are active, how do you explain the current difference?
It should be the same, and the HP should be less running on 120V if only half are active.
So yes, there is something to absorb, and you still haven't...
Explanation - The windings of a single-phase dual voltage 120V/240V motor are 120V rated windings. They must be put in parallel on 120 so that they will be connected at their rated voltage. Likewise, if put in series on a 240V supply, the 240V divides across the two equal resistance windings, so 1/2 of the 240V (120V) is applied across each winding.
If you put the windings in series on 120V, you would only receive 60V on each winding, which would not be enough to provide the proper magnetizing effect to develop turning torque.
If you put the windings in parallel on 240V, you would be putting the full 240V on each 120V rated winding, and you would burn the windings up.
A good read: