Title :
Frequency Domain Decomposition of 3-D Eddy Current Problems in Steel Laminations of Induction Machines
Author :
Handgruber, Paul ; Stermecki, Andrej ; Biro, O. ; Ofner, Georg
Author_Institution :
Christian Doppler Lab. for Multiphysical Simulation, Anal. & Design of Electr. Machines, Graz Univ. of Technol., Graz, Austria
Abstract :
A novel method to reduce the computational burden of 3-D eddy current problems in steel laminations of induction machines is presented. Instead of a nonlinear time-stepping analysis, a set of linear time-harmonic simulations for known frequencies is used. The linear model considers the machines´ saturation by a reluctivity obtained from a nonlinear 2-D field solution. Solving the time-harmonic problems in parallel results in a fast method. Comparisons with a time-stepping approach confirm the validity of the proposed method. Different eddy current formulations are investigated to accelerate the solution of the time-harmonic problems.
Keywords :
asynchronous machines; eddy currents; frequency-domain analysis; 3D eddy current problems; frequency domain decomposition; induction machines steel laminations; linear time-harmonic simulations; nonlinear 2D field solution; nonlinear time-stepping analysis; time-harmonic problems; Computational modeling; Eddy currents; Harmonic analysis; Rotors; Solid modeling; Stators; Transient analysis; AC machines; eddy currents; electric machines; finite element analysis; magnetic losses;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2013.2279379