Analytical Modeling of the Open-Circuit Magnetic Field in Axial Flux Permanent-Magnet Machines With Semi-Closed Slots

Tiegna, Huguette; Bellara, A.; Amara, Yacine; Barakat, Georges

doi:10.1109/tmag.2011.2171979

Cited by 95 publications

(49 citation statements)

References 20 publications

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“…In this work, one method in calculation of the air gap flux is the Quasi 2D modeling based on [12,13]. The idea of this method is to stretch the machine over the 2D domain and to divide the radial length of the machine to n s slices each of average radius R av i in (1) and radial length t cp in (2).…”

Section: Calculation Of Magnetic Field Using An Analytical Modelmentioning

confidence: 99%

Analytical modeling of eddy current losses in Axial Flux PMSM using resistance network

Hemeida

Sergeant

2014

2014 International Conference on Electrical Machines (ICEM)

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This paper presents an analytical modeling of eddy current losses of an Axial Flux Permanent Magnet Synchronous Machine (AFPMSM) using coupled solution of Maxwell's equations and resistance network. The idea is based on calculating the flux density in an accurate way in the air gap area and on the magnet surface taking into account the effect of armature field and slotting effect. The resistance network for the magnet is then reconstructed by dividing it into a number of nodes and branches. The sources in the resistance network are based on the time derivative of the flux density on the permanent magnet (PM) surface.The field solution is analyzed in the frequency domain and the magnetic resistance network is solved for each frequency. Compared to the Finite Element Method (FEM), the analytical model has the advantage of flexibility in geometrical machine parameters, less CPU time, and accurate results.

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Section: Calculation Of Magnetic Field Using An Analytical Modelmentioning

confidence: 99%

Analytical modeling of eddy current losses in Axial Flux PMSM using resistance network

Hemeida

Sergeant

2014

2014 International Conference on Electrical Machines (ICEM)

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“…To take into account the magnetic yoke, the method of images is used. -Fourier analysis based on the resolution of Maxwell's equations by the method of separation of variables [17][18][19][20][21][22][23][24]. This method assumes an infinite permeability of the ferromagnetic materials so iron faces appear as homogeneous boundary conditions.…”

Section: Soft-iron Yokementioning

confidence: 99%

“…Most of the computations are done in 2D so neglecting edge effects [19,20]. To consider 3D effects in a 2D model, a multi-slice approach can be used so better results can be obtained [21,22]. Three-dimensional models [23,24] are also developed for electrical machines analysis but the slotting effects are taken into account using the Carter coefficient.…”

Section: Soft-iron Yokementioning

confidence: 99%

Three-Dimensional Analytical Model for an Axial-Field Magnetic Coupling

Dolisy

Lubin

Mezani

et al. 2014

PIER M

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Abstract-In this paper, we propose an analytical method for modeling a permanent magnets axial field magnetic coupling. The three-dimensional model takes into account the radial fringing effects of the coupler. The analytical solution requires resolving the Laplace equation in low permeability subdomains. The magnetic field calculation allows the determination of global quantities like axial force and torque. 3D finite element computations as well as measurements validate the proposed model.

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“…However, such a model is a very time consuming. Faster 2D FE models are developed in [6]. These models consist of three steps.…”

Section: Introductionmentioning

confidence: 99%

“…The obtained vector potentials are linked to each other via suitable boundary conditions. The authors, in [6,18], updated the model to be used for AFPMSMs with semiclosed slots. In [19], the authors developed a subdomain model of one slot and two PMs and made a superposition of all PMs and slots in the machine.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Three Analytical Methods for the Precise Calculation of Cogging Torque and Torque Ripple in Axial Flux PM Machines

Hemeida

Hannon

Vansompel

et al. 2016

Mathematical Problems in Engineering

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A comparison between different analytical and finite-element (FE) tools for the computation of cogging torque and torque ripple in axial flux permanent-magnet synchronous machines is made. 2D and 3D FE models are the most accurate for the computation of cogging torque and torque ripple. However, they are too time consuming to be used for optimization studies. Therefore, analytical tools are also used to obtain the cogging torque and torque ripple. In this paper, three types of analytical models are considered. They are all based on dividing the machine into many slices in the radial direction. One model computes the lateral force based on the magnetic field distribution in the air gap area. Another model is based on conformal mapping and uses complex Schwarz Christoffel (SC) transformations. The last model is based on the subdomain technique, which divides the studied geometry into a number of separate domains. The different types of models are compared for different slot openings and permanent-magnet widths. One of the main conclusions is that the subdomain model is best suited to compute the cogging torque and torque ripple with a much higher accuracy than the SC model.

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Analytical Modeling of the Open-Circuit Magnetic Field in Axial Flux Permanent-Magnet Machines With Semi-Closed Slots

Cited by 95 publications

References 20 publications

Analytical modeling of eddy current losses in Axial Flux PMSM using resistance network

Analytical modeling of eddy current losses in Axial Flux PMSM using resistance network

Three-Dimensional Analytical Model for an Axial-Field Magnetic Coupling

Comparison of Three Analytical Methods for the Precise Calculation of Cogging Torque and Torque Ripple in Axial Flux PM Machines

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