Space-Vector Dynamic Model of Dual-Three Phase Induction Motors With Balanced and Unbalanced Structures in State Form

This paper proposes a space-vector dynamic model of the dual three-phase induction motor that tries to overcome some limits of the previously developed models. It is expressed in state form assuming the stator current and the rotor flux as state variables and formalized in the stator reference frame. The model has been formulated mathematically in such a formal way that the same structure can be used in both structurally balanced and unbalanced (open stator phase winding) working conditions. Moreover, the model can describe the behavior of the motor for any open stator winding. The proposed dynamic model has been tested in numerical simulation and has been validated experimentally, in both structurally balanced and unbalanced working conditions. To this aim, a dual three-phase winding has been designed and constructed starting from an off-the-shelf traditional three-phase induction motor.