E. Schmidt, R. Lechner, M. Schrödl:
"Space Vector Model of an Induction Machine with Two Independently Controllable Shafts Based on the DUOMOTOR Principle";
Poster: IEEE Canadian Conference on Electrical and Computer Engineering (CCECE), Winnipeg, CA; 05-12-2002 - 05-15-2002; in: "Proceedings of the IEEE Canadian Conference on Electrical and Computer Engineering (CCECE)", Vol.I (2002), ISBN: 07803-7514-9; 268 - 273.

The DUOMOTOR consists of one stator and two unilateral beared 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 of additional space harmonics in the stator MMF distribution caused by the two independent machine parts.