Comparative Analysis of Eddy-Current Loss in Permanent Magnet Synchronous Machine Considering PM Shape and Skew Effect Using 3-D FEA

Koo, Min-Mo; Choi, Jang-Young; Hong, Keyyong; Lee, Kangsu

doi:10.1109/tmag.2015.2442240

Cited by 19 publications

(6 citation statements)

References 12 publications

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“…The PM is inserted into the rotor core in a solid form, so the return path and the axial direction of the eddy current cannot be ignored. For this reason, the eddy current loss of the PM should be calculated by three-dimensional (3-D) finite element analysis (FEA) or 3-D analytical analysis so that accurate values can be obtained [9][10][11][12]. However, 3-D FEA has many limitations in terms of time, cost, and effort.…”

Section: Of 15mentioning

confidence: 99%

Interior Permanent Magnet Synchronous Motor Design for Eddy Current Loss Reduction in Permanent Magnets to Prevent Irreversible Demagnetization

et al. 2020

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We designed and analyzed an interior permanent magnet synchronous motor (IPMSM) to prevent irreversible demagnetization of the permanent magnets (PMs). Irreversible demagnetization of NdFeB PMs mainly occurs due to high temperature, which should thus be minimized. Therefore, it is necessary to reduce the eddy current loss in the PM through optimal design. The shape of the rotor core was optimized using finite element analysis (FEA) and response surface methodology. Three-dimensional (3-D) FEA is required for accurate computation of the eddy current loss, but there is huge time, effort, and cost consumption. Therefore, a method is proposed for indirectly calculating the eddy current loss of PMs using 2-D FEA. A thermal equivalent circuit analysis was used to calculate the PM temperature of the optimized model. For the thermal analysis, the copper loss, core loss, and eddy current loss in PMs were estimated and applied as a heat source. Based on the results, we confirmed the stability of the optimum model in terms of the PM demagnetization.

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Section: Of 15mentioning

confidence: 99%

Interior Permanent Magnet Synchronous Motor Design for Eddy Current Loss Reduction in Permanent Magnets to Prevent Irreversible Demagnetization

et al. 2020

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“…The magnet segmentation method is currently the most effective method to decrease permanent magnets' eddy current losses, and this method has a low impact on other motor performance [3][4][5] . Many scholars have studied magnet segmentation to reduce eddy current loss: Gu et al [6] analyzed the theoretical relationship of eddy-current loss of magnet between the axial and circumferential division of permanent magnet.…”

Section: Introductionmentioning

confidence: 99%

Effect of Permanent Magnet Segmentation Structure on Eddy Current Loss of Permanent Magnet Synchronous Motor

Yang,

Wu,

Wang

2023

J. Phys.: Conf. Ser.

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For this essay, the mechanism of cutting a magnet to reduce its loss is investigated using the equivalent circuit of magnet segmentation, and the method is verified by the finite element method. The results indicate that the segmentation of magnets can effectively reduce the eddy current loss of magnets. The larger the product of segmented lengths is, the smaller the eddy current loss is. The higher the number of segments is, the lower of loss value is. The rotational speed and eddy current loss are in the square. Load multiple and eddy current loss is in cubic growth.

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“…There are four methods, FEA, analytical, magnetic equivalent circuit, hybrid method, to predict magnetic field distribution. FEA can predict magnetic field distribution accurately by considering saturation effect and the complex geometric models of machines [7]- [8]. It is very timeconsuming and the accuracy is depended on the quality of mesh.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Field Prediction of Module-Combined Stator Permanent Magnet Synchronous Motor Based on a Nonlinear Hybrid Analytical Model

et al. 2021

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Module-combined stator permanent-magnet machines have several independent stator modules and each module can be controlled independently. To predict the magnetic field distribution of modulecombined stator permanent-magnet machines accurately under asymmetric conditions, this paper proposes a novel nonlinear subdomain and magnetic equivalent circuit hybrid analytical model. The main novelty of the proposed nonlinear hybrid analytical model is representing nonlinear effect by equivalent current sheets on the edges of slots. Equivalent current densities are calculated from magnetic equivalent circuit and used as boundary conditions in the improved subdomain model. The values of the equivalent current sheets are obtained in an iterative algorithm. The nonlinear hybrid analytical model considering saturation effect can accurately calculate magnetic field distribution and electromagnetic performance even under overload conditions. The finite element analysis is performed to validate the accuracy of the proposed model. A prototype with three stator modules is manufactured and the experimental results verified these predictions.INDEX TERMS Magnetic field prediction, saturation effect, hybrid model, module-combined stator.

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Comparative Analysis of Eddy-Current Loss in Permanent Magnet Synchronous Machine Considering PM Shape and Skew Effect Using 3-D FEA

Cited by 19 publications

References 12 publications

Interior Permanent Magnet Synchronous Motor Design for Eddy Current Loss Reduction in Permanent Magnets to Prevent Irreversible Demagnetization

Interior Permanent Magnet Synchronous Motor Design for Eddy Current Loss Reduction in Permanent Magnets to Prevent Irreversible Demagnetization

Effect of Permanent Magnet Segmentation Structure on Eddy Current Loss of Permanent Magnet Synchronous Motor

Magnetic Field Prediction of Module-Combined Stator Permanent Magnet Synchronous Motor Based on a Nonlinear Hybrid Analytical Model

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