Analytical Modeling of Axial-Flux Permanent Magnet Eddy Current Couplings With a Slotted Conductor Topology

Dai, Xin; Liang, Qinghua; Cao, Jiayong; Long, Yongjun; Mo, Jinqiu; Wang, Shigang

doi:10.1109/tmag.2015.2493139

Cited by 69 publications

(31 citation statements)

References 38 publications

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“…The difference between the two characteristics is never greater than 2%. This result has been confirmed with other geometrical values and is in accordance with the results given in [6] and [7]. Therefore, it is possible to neglect the back-iron conductivity in order to obtain a simpler model for the axial-field eddy-current magnetic coupling, as it is illustrated in the next section.…”

Section: Impact Of the Conductor Back-iron On The Torque Valuesupporting

confidence: 89%

“…The 3-D radial edge effects, which cannot be neglected for such devices, are taken into account by using the well-known Russel and Norsworthy's correction factor [11]. However, it has been shown that this correction factor is not always accurate [5], [6]. Its precision greatly depends on the slip speed and on the coupling geometry: radial depth and pole pitch values.…”

Section: Introductionmentioning

confidence: 99%

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Improved 3-D Analytical Model for Axial-Flux Eddy-Current Couplings With Curvature Effects

Lubin

Rezzoug

2017

IEEE Trans. Magn.

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An improved three-dimensional analytical model for axial-flux permanent-magnet eddy-current couplings is presented in this paper. As the problem is solved in a 3-D cylindrical coordinate system, the proposed model directly takes into account the radial edge effects and the curvature effects on the torque prediction without the need of any correction factor. It is shown that the new analytical model is very accurate, even for the geometries where the curvature effects are very pronounced. Another advantage of the proposed model is the great reduction of computation time compared to 3-D finite elements simulations and an easier adaptation for parametric studies and optimization.

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Section: Impact Of the Conductor Back-iron On The Torque Valuesupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Improved 3-D Analytical Model for Axial-Flux Eddy-Current Couplings With Curvature Effects

Lubin

Rezzoug

2017

IEEE Trans. Magn.

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“…The magnetic torque of the AFPMCs with a Halbach array is critical because the operation area of the PMCs is restricted by the maximum allowable torque [8][9][10]. By accurately predicting the maximum torque value, the product can be minimized, and unnecessary production costs can be reduced [11].…”

Section: Results Obtained With 3d Finite Element Analysismentioning

confidence: 99%

Design of Axial Flux Type Permanent Magnet Coupling with Halbach Magnet Array for Optimal Performance Considering Eddy Current Loss Reduction Using 3-D Finite Element Method

Jang¹,

Seo²,

Kim³

et al. 2018

IJET

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Background/Objectives: This study proposes and verifies a design method that considers the permanent magnet (PM) loss reduction of axial flux permanent magnet coupling (PMC), to replace mechanical coupling.Methods/Statistical analysis: In this study, the design of an axial magnetic flux PMC is performed using a three–dimensional (3D) commercial finite element (FEM) analysis program, and an optimum design is performed through parametric analysis. In addition, we designed a PMC that minimizes loss by analyzing the PM eddy current loss when using divided magnets.Findings: We found that some parameters (thickness of the PM, number of poles, ratio of inner radius to outer radius) act on the magnetic torque of the axial flux coupling. Using these results, we could obtain the design point. Further, to reduce the PM eddy current loss in the designed coupling, we used the PMs divided radially and circumferentially to obtain the magnet shape to minimize the loss. In addition, the fabricated coupling proved that the design results of the 3D FEM matched with the experimental results.Improvements/Applications: We propose an optimal design method of an axial flux PMC using 3D FEM, and a method to reduce eddy current loss using divided magnets

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“…The 3D integral process of space electromagnetic field is complex, which is unfavorable for rapid optimization design. The validity of the average radius for solving the output torque has been proved in the literature [25][26][27][28][29][30]. Therefore, the output torque is as follows:…”

Section: Torque Modelmentioning

confidence: 96%

“…Current studies show that results according to this model are not always accurate. Further, when slip is higher than 10% the error model is unacceptable, such that present studies are limited to less than 10% slip [25][26][27][28][29][30][31]. In literature [32], according to the slip, the Russell-Norsworthy factor is continuously revised, and the theoretical value is basically consistent with the FEM value within 100% slip.…”

Section: Introductionmentioning

confidence: 93%

Nonlinear Modeling of Transmission Performance for Permanent Magnet Eddy Current Coupler

Yang

Liu

Wang

2019

Mathematical Problems in Engineering

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Establishing the analytical model for accurately predicting the transmitted torque of the permanent magnet eddy current coupler (PMEC) with double conductor rotors is very important to study the nonlinear transmission performance of the PMEC. In this paper, based on magnetic equivalent circuit (MEC) approaches, considering the effects of permanent magnet (PM) end leakage, side leakage, and back iron saturation, the 3D magnetic field model of the PMEC is established. Based on the magnetic field model, combined with Faraday’s law and Ampere’s law, the 3D nonlinear model of the PMEC is established. The proposed model adopts the Jenei method to describe the inductance limited eddy current field. The theoretical data, 3D finite element method (FEM) data, and experimental data are compared. The research shows that the predicted value of the analytical model matches well with the torque obtained by 3D FEM and experiments in the range of 0-100% slip, with an error less than 5.3% observed. Finally, the influence of structural parameters on the transmission performance of the PMEC is studied by using the proposed model.

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Analytical Modeling of Axial-Flux Permanent Magnet Eddy Current Couplings With a Slotted Conductor Topology

Cited by 69 publications

References 38 publications

Improved 3-D Analytical Model for Axial-Flux Eddy-Current Couplings With Curvature Effects

Improved 3-D Analytical Model for Axial-Flux Eddy-Current Couplings With Curvature Effects

Design of Axial Flux Type Permanent Magnet Coupling with Halbach Magnet Array for Optimal Performance Considering Eddy Current Loss Reduction Using 3-D Finite Element Method

Nonlinear Modeling of Transmission Performance for Permanent Magnet Eddy Current Coupler

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