EM_SCIM_NL_006

Objective

Validation objective
Topology SCIM
Model Types Electromagnetic non-linear magnetostatic FEM EM3.PMSM
Electromagnetic permeance / mmf model EM1.SCIM
Quantities Airgap radial no-load flux density
Geometry Internal rotor
Semi-closed slots, polar geometry
Winding Shorted-pitch distributed windings

The objective is to validate the calculation of the no-load airgap flux density waveform by comparison with the following article based on subdomain: Boughrara, K.; Takorabet, N.; Ibtiouen, R.; Touhami, O.; Dubas, F., "Analytical Analysis of Cage Rotor Induction Motors in Healthy, Defective, and Broken Bars Conditions," in Magnetics, IEEE Transactions on , vol.51, no.2, pp.1-17, Feb. 2015

Machine

The model from the article is the following:

Publication winding distribution
Publication winding distribution
Publication topology
Publication topology

MANATEE permeance / mmf model:

SCIM_006 Topology
SCIM_006 Topology

MANATEE finite element model (FEMM):

MANATEE finite element model (FEMM)
MANATEE finite element model (FEMM)

Results

Radial airgap flux (Femm vs Permeance/mmf)
Radial airgap flux (Femm vs Permeance/mmf)

One can see that the permeance mmf model accuracy is similar to the finite element one. In that case the use of permeance mmf model is very interesting as its computing time (0.1 sec) is much smaller than the subdomain or the finite element one. All the slotting effects are correctly taken into account, which is particularly important for the assessment of vibration and noise due to magnetic forces.

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