Two-Dimensional and Three-Dimensional Core and Magnet Loss Modeling in a Radial Flux and a Transverse Flux PM Traction Motor
Journal article, 2017

Analytical estimations and verified simulation models both in two dimension (2-D) and three dimension (3-D) are used to compare loss calculations of a radial flux machine (RFM) and a transverse flux machine (TFM) for a traction application. The analysis highlights the importance of a dense mesh and a high number of time steps when calculating core and magnet loss with an finite element method (FEM) program. It also shows the practical handling of loss modeling in 2-D and 3-D, including a stacking factor for the core lamination and magnet segmentation, and it is recommended that one is careful when comparing losses from 2-D and 3-D models. The TFM is shown to have much higher magnet loss compared with the RFM, although the TFM magnet design (with ring magnets) makes segmentation very effective.

traction motors

Magnetic cores

permanent magnet motors

magnetic losses


Sonja Tidblad Lundmark

Chalmers, Energy and Environment, Electric Power Engineering

Poopak Roshanfekr

Chalmers, Energy and Environment, Electric Power Engineering

IEEE Transactions on Industry Applications

0093-9994 (ISSN) 1939-9367 (eISSN)

Vol. 53 3 2028-2039 7858749

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering



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