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Author:Silwal, Bishal
Title:Computation of eddy currents in a solid rotor induction machine with 2-D and 3-D FEM
Publication type:Master's thesis
Publication year:2012
Pages:ix + 62      Language:   eng
Department/School:Sähkötekniikan laitos
Main subject:Sähkömekaniikka   (S-17)
Supervisor:Arkkio, Antero
Instructor:Belahcen, Anouar
Electronic version URL: http://urn.fi/URN:NBN:fi:aalto-201209213171
OEVS:
Electronic archive copy is available via Aalto Thesis Database.
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Location:P1 Ark Aalto  1397   | Archive
Keywords:electrical machines
finite element method
FEM
eddy currents
coupled models
Abstract (eng): Although a two-dimensional numerical analysis of an electrical machine provides an approximately accurate solution of the electromagnetic field in the machine, a three-dimensional study is needed to understand the actual phenomena.
But due to the large problem size and the complex geometries, the three dimensional model requires a huge amount of degrees of freedoms (DoFs) to be solved, which is not possible with a limited computing resources.
Therefore, a coupled 2D-3D model can be the best alternative to solve such type of problems.

In this thesis, a 2-D finite element analysis is performed on a solid rotor induction motor by an in-house software FCSMEK.
The eddy current in the solid steel rotor was computed.
A 3-D model for the same machine was built and solved in COMSOL MultiphysicsTM.
To reduce the computation time of the 3-D model, the solution of the 2-D model was used as the source to the 3-D model where the stator current density is used as a transferred variable.
The eddy currents are computed and the results from both 2-D and 3-D simulations are compared.
Other quantities of interest such as the torque of the machine computed with the 2-D and 3-D models are also computed and compared.
ED:2012-08-20
INSSI record number: 45058
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