March 2016 : MANATEE 1.05.02 and ICEM publications

MANATEE v1.05.02 is available

MANATEE (Magnetic Acoustic Noise Analysis Tool for Electrical Engineering) software logo

This new version introduces the following features :
- Permeance computation with FEMM including magnetic wedge effect.
- A new way to handle buried magnets to create more complex BPMSM topology
- Some new geometries of slots have been added to make sure that you will find the one that suits to your application.
- The possibility to provide your own skew function.
- Some new validation tests have been implemented to compare the software results to experimental data.

All the new features of MANATEE v1.05.02 are available on our website.

Zoom on MANATEE feature

It is now possible to calculate the rotor magnetomotive force using finite element (automated coupling to FEMM) by specifying Input.Simu.type_rmmf_model=1. This is particularly interesting for interior magnet applications with complex geometries, where the reluctance models are unavailable or not accurate due to wrong estimation of the bridge saturation levels.

This way, the advantages of permeance / magnetomotive force models, such as eccentricity and uneven airgap modelling, can be kept for buried magnet topologies. This is done by a single call to a parametrized pole model in non-linear magnetostatics. Example of the Prius 2004 case:

Prisu rotor magnetomotive force computation with FEMM
Prisu rotor magnetomotive force computation with FEMM


International Conference on Electrical Machines

Three articles have been submitted to ICEM 2016 around MANATEE models :

The first one "Fast Prediction of Variable-Speed Acoustic Noise and Vibrations due to Magnetic Forces in Electrical Machines" analyses several vibro-acoustic simulation works based on full numerical methods, and shows that the models of MANATEE can be as accurate as FEA while overcoming several limitations of FEA.

The second one entitled "A review of subdomain modelling techniques in electrical machines: performances and applications" reviews the subdomain model techniques used for airgap flux density calculation, and shows how an efficient numerical implementation can give both fast and accurate results, without being sensitive to meshing contrary to FEA techniques. These modelling methods are therefore particularly adapted for the calculation of noise & vibration due to electromagnetic forces.

The third one entitled "Effect of magnetic wedges on electromagnetically-induced acoustic noise and vibrations of electrical machines" uses MANATEE to estimate the effect of magnetic wedges on electromagnetic acoustic noise and vibration, and show that magnetic wedges have a very limited effect on vibroacoustics.

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