Analysis of Axial Flux PM Machines including stator and rotor core losses

This study presents a new method to detect the magnet defects in permanent magnet (PM) machines by calculating the magnet's MMF function from the machine's electrical variables. The authors propose for the first time an inverse transformation to map the winding flux waveform into the corresponding magnet MMF function. The analysis of this function defines the fault occurrence and its position. The winding flux waveform is computed from the electrical variables and this study adopts a reduced order model of the magnetic equivalent circuit to define the direct and inverse transform between the magnet's MMF and the winding flux; for this reason the authors call the new approach the inverse transform method. A dedicated PM machine with a defective magnet has been constructed to validate the proposed method by comparing simulation and experimental results.

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“…FEM is an accurate method for analysis of the electrical machines [14, 15]. In this paper, the FEM analysis is done by MAXWELL software (Fig.…”

Section: Reduced Order Model Of Mecmentioning

confidence: 99%

Inverse transform method for magnet defect diagnosis in permanent magnet machines

Abbaszadeh

Saied

Hemmati

et al. 2014

IET Electric Power Applications

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“…Some other solutions are based on mathematical reluctance network models [10]. In [11] and [12], a quasi-3-D analytical solution is proposed, while in [13], a 3-D analytical model in terms of space vectors is proposed. However, analytical solutions are not only proposed for the electromagnetic modeling of an axial-flux machine.…”

Section: Introductionmentioning

confidence: 99%

Axial-Flux-Machine Modeling With the Combination of FEM-2-D and Analytical Tools

Egea

Almandoz

Poza

et al. 2012

IEEE Trans. on Ind. Applicat.

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This paper deals with the development of analysis tools for axial-flux permanent-magnet machines. Normally, the study of this kind of machine involves three-dimensional (3-D) finite element method (FEM) (FEM-3-D) due to the 3-D nature of the magnetic problem. As it is widely known, the FEM-3-D software could take too much time, and both definition and solving processes of the problem may be very arduous. In this paper, a novel analysis procedure for axial-flux synchronous machines is proposed. This method consists in the combination of 2-D FEM simulations with analytical models based on the Fourier-series theory. The obtained results prove that the proposed method could be a very interesting option in terms of time and accuracy.Index Terms-Analytic models, axial-flux machines, finite element method (FEM), Fourier series.

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