Hello, so I was looking at some dc to ac mechanical generators when a dc motor is used to drive a generator which in turn induced ac as was used for power conversion back in the day when semiconductor devices were not around yet.Well they had some drawbacks as the mechanical wear and etc. So I came up with a strange idea and wanted to ask some expert opinion about could such a device work at all and how efficiently? In the attached picture you can see a toroidal ring with a empty middle.around the ring there are 4 primary windings and 4 secondary windings.The windings could be switched in parallel or series operation based on the ring size wire turn ratio etc.But to get a theoretical understanding that is not so important right now. In the middle of the toroidal ring there is a magnetic fluid the fluid is separated in three or four parts let's say and the separation is made by a dielectric fluid with no magnetic properties, the inside magnet could be made out of solid magnet with solid dielectric between and flowing into a fluid or whatnot.But that is again "semantics" this is just a theoretical device. So applying the DC current to the primary coils would start to push and create magnetic field in the rotating ring magnet which would then while rotating pass the secondary coils that are just after the primary ones and induce a current in them hence a moving magnetic field cutting the secondary wire perpendicularly. The question then is how fast could the magnetic fluid be able to spin if the ring would be in vacuum from inside? Also could mounting a electrically charged plate right between each of the primary and secondary windings help to make the field of the liquid fluid stronger as it now would have a opposing electrical field to the one in the primary wires just like in a dc brushed motor where the rotor has winding with current passing through them too which make the magnetic field between the stator and rotor stronger. Basically this is a linear motor bent around into a toroid shape ring , for the toroidal ring to work the inner flowing magnets should be separated in parts I guess otherwise because of the uniform field on the DC the magnets would not spin at all but when they are separated each of them feels a pull when passing through each of the DC primary windings shown in the picture , the secondary windings are colored pink. Also what difference would it make if the toroid ring itself the outer part of it would be made if a dielectric material like plastic or metal like copper?wouldn't metal outer shell distribute the magnetic field created by the DC primary windings evenly and hence stop the chance of the inner flowing magnet to start moving ?