Multi-slice FE modeling of electrical machines with skewed slots-the skew discretization error

Analysis of salient-pole synchronous generators operating in single-phase condition

“…In order to take into account the stator skewing, several slices of the generator are analyzed and separately solved [10,11]. These slices differ from each other for the different initial positions of the rotor with respect to the stator.…”

Auralization of electrical machines in variable operating conditions

“…The flux density distribution of one time step can be seen in Figure 8. Skewing is accounted for by means of the multi-slice method [12]. Electromagnetic force-density waves are extracted as nodal forces.…”

Investigation on a choice of stator slot skew angle in brushless PM machines

“…A quasi-3D numerical model for magnetic computation assumes uniform magnetic field distribution along with single two-dimensional submodel (slice) in z direction [12]. The whole model is composed of n s such slices.…”

“…Using backward Euler formula [13] for approximation of time-derivatives in (12) results in the time-stepping system of field and circuit equations:…”

“…The skew factors resulted from this formula are slightly higher than those resulted from (3), and consequently it is worth investigating how application of new skew angle values influences the overall performance of machine as it may lead to costeffective solutions. To characterize these effects quantitatively, the authors develop a quasi-3D multi mesh-slice finite element model [12]. An investigation is presented including the model development and the analysis of machine operation under no-load and full-load conditions.…”