Coupled 2-D and 3-D Eddy Current Analyses for Evaluating Eddy Current Loss of a Permanent Magnet in Surface PM Motors

Okitsu, Takashi; Matsuhashi, Daiki; Gao, Yanhui; Muramatsu, Kazuhiro

doi:10.1109/tmag.2012.2197189

Cited by 32 publications

(11 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The 3D eddy-current analysis only of the PM was calculated from the flux distribution obtained by 2D FEA. An extended coupled method applied to surface-mounted PMSM was presented in [112], where the uniform air-gap was replaced by a variable equivalent air-gap to consider the space variation of the air-gap width. The authors of [113,114] proposed a multilayer-2D-2D coupled model to estimate eddy-current losses in PMs of axial-flux PMSMs.…”

Section: Fe Magneto-dynamic Methodmentioning

confidence: 99%

Permanent-Magnet Eddy-Current Losses: A Global Revision of Calculation and Analysis

Ouamara

Dubas

2019

MCA

View full text Add to dashboard Cite

Eddy-current analysis is an important research field. This phenomenon occurs in multiple areas and has several applications: electromagnetic braking, repulsive effects, levitation, etc. Thereby, this paper is limited to eddy-current study in rotating electrical machines. In the design process, if the permanent-magnet (PM) loss calculation is very important, the overheating due to eddy-currents must be taken into account. The content of this paper includes sources, calculation methods, reduction techniques, and thermal analysis of PM eddy-current losses. This review aims to act as a guide for the reader to learn about the different aspects and points to consider in studying the eddy-current.

show abstract

Section: Fe Magneto-dynamic Methodmentioning

confidence: 99%

Permanent-Magnet Eddy-Current Losses: A Global Revision of Calculation and Analysis

Ouamara

Dubas

2019

MCA

View full text Add to dashboard Cite

show abstract

“…Due to sub-and superharmonics of the air-gap field, the eddy current losses generated in the permanent magnets of such machines may always lead to an excessive heating [1][2][3][4][5]. In particular with surface mounted permanent magnets, this can cause the magnets to get partially or even fully demagnetised [6][7][8][9]. Thus, the precalculation of these eddy current losses caused by the harmonics of the air-gap field is an important matter of interest with the design process of such electrical machines.…”

Section: Introductionmentioning

confidence: 99%

Eddy current losses in permanent magnets of surface mounted permanent magnet synchronous machines—Analytical calculation and high order finite element analyses

Schmidt

Wolfschluckner²

2017

Elektrotech. Inftech.

View full text Add to dashboard Cite

Permanent magnet exited synchronous machines always show three significant portions of their losses: Iron losses within the magnetic circuit, power losses within the stator winding and finally eddy current losses within the permanent magnets. In particular, surface mounted magnets are directly exposed to asynchronous components of the air-gap field caused by either higher harmonic waves or higher time harmonics. Analytical calculation of the eddy current losses within the permanent magnets for both linear as well as cylindrical arrangements describe fundamental characteristics in dependence on only few significant parameters. These results serve as reference results for detailed numerical calculations using the finite element method, too. The finite element analyses with various formulations of the shape functions show the significant influence of the higher order elements on the accuracy of the eddy current losses. Additionally, the effects of a various pole coverage can be obtained from the results of the numerical calculations. Therefore, a clear summary of the significant parameters influencing the eddy current losses within the permanent magnets for both linear as well as cylindrical arrangements will be established.Keywords: eddy currents; eddy current losses; permanent magnet machine; finite element analysis Wirbelstromverluste in den Oberflächenmagneten von Synchronmaschinen mit PermanentmagneterregungTheoretische und praktische Aspekte der analytischen und numerischen Berechnungen. Synchronmaschinen mit Permanentmagneterregung besitzen drei wesentliche

show abstract

“…In particular three dimensional (3D) FEA is essential when considering stator skew effect. The variations of the eddy current in the z-direction due to armature-reaction field are obtained using 3D FEA [8]- [10].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2015

View full text Add to dashboard Cite

In this study, eddy current loss in permanent magnets (PMs) due to the armature reaction field of a PM synchronous machine (PMSM) was analyzed. Various techniques, including numerical techniques such as finite element analysis (FEA), enable the accurate prediction and analysis of magnetic field distribution with saturation effects. Furthermore, the eddy current loss can be easily analyzed using commercial software. Three dimensions (3D) FEA is essential when considering the stator skew effect. In particular, the influence of time harmonics in armature current and space harmonics due to distributed magneto-motive force on the eddy current loss is thoroughly investigated and discussed on the basis of 3D FEA.Index Terms-3D FEA, eddy current loss, PM shape, skew effect.

show abstract

Coupled 2-D and 3-D Eddy Current Analyses for Evaluating Eddy Current Loss of a Permanent Magnet in Surface PM Motors

Cited by 32 publications

References 10 publications

Permanent-Magnet Eddy-Current Losses: A Global Revision of Calculation and Analysis

Permanent-Magnet Eddy-Current Losses: A Global Revision of Calculation and Analysis

Eddy current losses in permanent magnets of surface mounted permanent magnet synchronous machines—Analytical calculation and high order finite element analyses

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

Contact Info

Product

Resources

About