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The paper deals with the accurate flux map modeling of synchronous reluctance motors, using finite element analyses. Non-negligible discrepancies were initially observed by comparing two-dimensional (2-D) finite element method (FEM) simulation results with measured flux maps of real machines. Conversely, the three-dimensional (3-D) FEM-based flux mapping offers more accurate estimation of the aforementioned flux linkage characteristics and gives evidence of the 3-D end effects being also a function of the relative position between the magneto-motive force waveforms of the rotor and the stator. The paper investigates such 3-D end effects for different rotor geometries and winding structures, utilizing 2-D and 3-D FEM analysis in comparison to experimental data. The paper confirms that the 3-D effects are non-negligible both in concentrated and distributed winding machines. A simple mathematical approach is proposed for the concentrated winding machine, capable of off-line correction of the 2-D FEM flux maps. The proposed closed-form equation is validated through 3-D FEM and experiments. [ABSTRACT FROM AUTHOR]

This paper deals with the results of measurements, calculations, and computer simulations, leading to the determination of the stator core's building factor (BF) of the fractional power synchronous reluctance motor (350 W). In the process of calculation, the authors indicated the part of the BF factor resulting from the punching process, the geometry of the stator core, and the fabrication process carried out during manufacture of the core. The obtained results indicate that for the analyzed core, the BF factor component resulting from the punching is greater than the sum of the components coming from clamping and pressing the core into the housing. The factor component dependent on geometry is less important. The data necessary for the finite-element method modeling were obtained from the modified SST system, whose idea has been described in detail. [ABSTRACT FROM PUBLISHER]