Analytical comparison of two different redundancy concepts for switched reluctance machines

In this paper two different, fully redundant SRM (switched reluctance machine) topologies are compared: Firstly a 6/4-topology with two identical motors on one axis, and secondly a 12/8-topology, where one 3-phase-system uses every other stator tooth (and the second, redundant, 3-phase-system uses the rest of the stator teeth). The following calculations are performed using analytical formulae to get a fast and clear comparison. The nonlinearity caused by the usual saturation of SRM is covered by a simple correction factor: As the relative comparison of the two redundancy concepts is of interest, this method leads to qualitative and quantitative good results. In addition, a very good starting point for the detailed FEM-refinement of the most promising alternative is generated