### 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:

MANATEE permeance / mmf model:

MANATEE finite element model (FEMM):

### Results

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.