Controlling the 3 speed quadrupole motor

In response to my last post, I have to give you a little more detail. 

Lets assume that coils A, B and C are installed on the outer stator and U, V and W are installed on the inner stator.

Here you will find down 3 possible systems. Your comments are welcome.

Scheme 1, option 1

In scheme 1, option 1, 3 contactors are use in series with the each coils and each coils are connected in parallel. Coil A is in parallel with it's sister coil U, coil B is in parallel with it's sister coil V, and coil C is in parallel with it's sister coil W. Switches are use to control the the contactors in with, the contacors will allow current to the coils, either the inner, the outer or both stators coils. In any condition, the should allways be at least on contactors energize.

Scheme 1, option 2

In scheme 1, option 2, the difference with the shceme 1, option 1, 3 contactors are connected in parallel with each coils and each coils are connected in series. Therefore, Coil A is in series with it's sister coil U, coil B is in series with it's sister coil V, and coil C is in series with it's sister coil W. Switches are use to control the contactors. In turns, the contacts of in parallel of the coils will be shorted to reroute the current, either the inner, the outer or both stators coils. In any cases, should both contactors, C1 and C2 be shorted at the same time.

The last one, two inverters are use. So what is the best system?
 

Scheme 2.

For systems 1, I do not know what will be the reaction of the inverter to rapid change. The answer certainly come from the manufacturer of the inverter.

Maybe the easiest would be 2 inverters.