Space vector model of an induction machine with two independently controllable shafts based on the DUOMOTOR® principle

The DUOMOTOR consists of one stator and two unilateral bearing rotors which are controlled independently of each other. The utilized rotors are either squirrel-cage induction or permanent magnet synchronous types. The paper describes the space vector model, the field oriented control and the losses of the machine which combines an induction and a permanent magnet synchronous rotor. The proposed models of both machine parts take into account additional space harmonics in the stator MMF distribution caused by the two independent machine parts.