Analytical iron loss model for the optimization of magnetic gear

Desvaux, Melaine; Multon, Bernard; Sire, Stéphane; Ahmed, Hamid Ben

doi:10.1109/iemdc.2017.8002255

Cited by 12 publications

(10 citation statements)

References 18 publications

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“…The configuration used to analyze the evolution of eddy current losses comprises a fixed pole-piece ring, which implies that the high-speed rotor corresponds to the internal ring while the low-speed rotor corresponds to the external ring. Integrating splitting into the analytical model solely entails dividing the angular integration terminals as a function of splitting (shown in (15) for the internal ring). Fig.…”

Section: B Magnets Splitting Considerationmentioning

confidence: 99%

“…To determine whether a ferromagnetic region is subjected to significant iron losses, it is suggested to draw the flux density evolution in a 2D , plane. The locus of the various ferromagnetic parts must then be analyzed in order to better understand the iron loss evolution, as presented in [15]. As shown in Fig.…”

Section: A Flux Density Evolutionmentioning

confidence: 99%

“…Magnetic losses have already been computed using the finite element method [9] [14], but computation time remains too high to integrate the magnetic loss computation into a set of models for a global mechatronic optimization of magnetic gears. Magnetic field hybrid analytical models proposed in [15] based on subdomain model [16] [17] coupled with permeance network model [18] should allow to compute analytically the different magnetic losses (eddy current in magnets and iron losses). An optimization procedure adapted to the analytical computation of magnetic losses must also be proposed.…”

mentioning

confidence: 99%

“…The major contribution of this article lies in the development of a fast computation of magnetic losses that incorporates both eddy current losses in permanent magnets and iron losses in laminated yokes and pole pieces based on a hybrid analytical model [15]. The magnetic loss computation model is based on the solution to Laplace's and Poisson's equations [16] [17] for permanent magnets and yokes and moreover depends on the evolution of the magnetic field.…”

mentioning

confidence: 99%

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Development of a Hybrid Analytical Model for a Fast Computation of Magnetic Losses and Optimization of Coaxial Magnetic Gears

Desvaux

Sire

Hlioui³

et al. 2019

IEEE Trans. Energy Convers.

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This article focuses on a 2D analytical model for a fast computation of magnetic losses due to eddy currents in the permanent magnets as well as iron losses in the ferromagnetic parts within coaxial magnetic gears. The magnetic field distribution is computed in yokes and permanent magnets by solving both Maxwell's equations, whereas for pole pieces the magnetic field is computed by coupling the previous analytical model with a reluctance network model. Both the eddy current losses and iron losses are determined from this hybrid analytical model. The iron loss model takes into account the temporal and spatial variations of flux density. The eddy current loss model takes into account the magnet splitting. Results of this magnetostatic eddy current loss model are then compared to the results obtained with a 2D magnetodynamic finite element model. A verification of validity limits is also proposed. The final function of this analytical model is to ensure integration into a set of models in the aim of a global mechatronic optimization of magnetic gears, for their insertion into a multi-megawatt wind turbines. A preliminary bi-objective, mass-efficiency optimization protocol is subsequently proposed along with an analysis of the computation time reduction via the presented models.

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Section: B Magnets Splitting Considerationmentioning

confidence: 99%

Section: A Flux Density Evolutionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Development of a Hybrid Analytical Model for a Fast Computation of Magnetic Losses and Optimization of Coaxial Magnetic Gears

Desvaux

Sire

Hlioui³

et al. 2019

IEEE Trans. Energy Convers.

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“…The average magnetic densities of the tooth and yoke for the iron loss evaluation have been obtained on the basis of the continuity of magnetic flux in the air-gap. Desvaux et al (2017) [18] used a hybrid method between the subdomain technique and the discretized linear MEC in the pole piece (i.e., modulation layer) for the optimization of coaxial magnetic gear. This enabled them to calculate the magnetic flux density distribution and the…”

Section: Introductionmentioning

confidence: 99%

Analytical Prediction of Iron-Core Losses in Flux-Modulated Permanent-Magnet Synchronous Machines

et al. 2019

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In this paper, an analytical approach allowing the prediction of the iron core losses in flux-modulated permanent-magnet synchronous machines (FM-PMSMs). According to the Maxwell-Fourier method (viz., the multi-layer model) and Cauchy's product theorem, the magnetic field distribution is determined in different parts of machine by considering the iron permeability on the basis of the solving both Poisson's and Laplace's equations. Next to the direct current (DC) bias flux density and the minor hysteresis loops, which are taken into account, the Bertotti's model and the flux variation locus (FVL) are employed to calculate the iron core losses under load and no-load conditions in post-processing from the magnetic field analytical calculation. Finally, in order to validate the proposed analytical method, the results are verified by the comparison with finite-element method (FEM). The comparisons show good results of the proposed model.

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