Characterization of rotor losses in permanent magnet machines

Caunes, Antomne Alexandre; Takorabet, Noureddine; Chaithongsuk, S.; Duranton, Laurent

doi:10.1108/compel-01-2020-0027

Cited by 2 publications

(4 citation statements)

References 11 publications

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“…Using (7), the distribution of phases A, B, and C and three-phase synthetic equivalent current sheet of three-phase under no-load condition when t = 0 can be obtained. The composite equivalent is shown in Figure 3.…”

Section: Analysis Of Equivalent Current Sheet Model Of Motormentioning

confidence: 99%

“…Several studies have been conducted to calculate the rotor eddy current loss of the PM motors [1][2][3][4][5][6][7]. For the axial flux permanent magnet motor, the 2D analytical model cannot accurately calculate the eddy current loss of permanent magnets.…”

Section: Introductionmentioning

confidence: 99%

“…The influence of the structure and the quantity of the auxiliary slots on the performance of the motor is summarized. Antomne et al [7] established a numerical model of the rotor of the high-speed permanent magnet motor by using the FEM and analyzed it by using the method based on the separation of the losses. The experimental results show that this method can accurately estimate different losses in the rotor in a short time.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Eddy Current Loss of 120-kW High-Speed Permanent Magnet Synchronous Motor

Pan

Tao

et al. 2022

Machines

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Pulse width modulation current harmonics and space harmonics are some of the major factors affecting the rotor eddy current loss of the high-speed permanent magnet motor. In this study, based on the principle of the equivalent current sheet, a two-dimensional motor model in a rectangular coordinate system was established. Considering the armature reaction, the end effect, and the current harmonics generated by variable frequency power supply, the eddy current loss of the rotor at different frequencies was analyzed and calculated using the analytical and finite element methods (FEM). When the frequency is between 200 Hz and 600 Hz, the variation trend of the rotor eddy current loss with a frequency obtained by analytical calculation and FEM analysis is roughly the same, and the error is still within a reasonable range. However, as the frequency continues to increase, the error between the two becomes larger and larger. Furthermore, based on the two-dimensional FE model, the influence of the sleeve material, the thickness, and the composite structure on the rotor eddy current loss were studied and analyzed. It was found that adding a graphene shielding layer between the permanent magnet and the sleeve can effectively shield the harmonic magnetic field, greatly reduce the eddy current loss of the permanent magnet, and effectively prevent the temperature of the permanent magnet from being too high, which is conducive to the continuous and stable operation of the high-speed permanent magnet motor.

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Section: Analysis Of Equivalent Current Sheet Model Of Motormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis of Eddy Current Loss of 120-kW High-Speed Permanent Magnet Synchronous Motor

Pan

Tao

et al. 2022

Machines

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“…introduction of additional air gaps), and the cut-edge effect is increased (Rens et al , 2016; Balluff et al , 2018; Steentjes et al , 2014; Vandenbossche et al , 2010). These changes also have an impact on iron losses (Rens et al , 2016; Vandenbossche et al , 2010; Vandenbossche et al , 2013; Petrun et al , 2016; Caunes et al , 2020; Soda et al , 2021; Baker et al , 2018). The aim of this paper is to present an in-depth analysis of the influence of stator segmentation on iron losses under comparable excitation conditions.…”

Section: Introductionmentioning

confidence: 99%

Influence of stator segmentation on iron losses in PMSMs for traction applications

Garmut

Petrun

2022

COMPEL

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Purpose This paper presents a comparative study of different stator-segmentation topologies of a permanent magnet synchronous machine (PMSM) used in traction drives and their effect on iron losses. Using stator segmentation allows one to achieve more significant copper fill factors, resulting in increased power densities and efficiencies. The segmentation of the stators creates additional air gaps and changes the soft magnetic material’s material properties due to the cut edge effect. The aim of this paper is to present an in-depth analysis of the influence of stator segmentation on iron losses. The main goal was to compare various segmentation methods under equal excitation conditions in terms of their influence on iron loss. Design/methodology/approach A transient finite element method analysis combined with an extended iron-loss model was used to evaluate discussed effects on the stator’s iron losses. The workflow to obtain a homogenized airgap length accounting for cut edge effects was established. Findings The paper concludes that the segmentation in most cases slightly decreases the iron losses in the stator because of the overall reduced magnetic flux density B due to the additional air gaps in the magnetic circuit. An increase of the individual components, as well as total power loss, was observed in the Pole Chain segmentation design. In general, segmentation did not change the total iron losses significantly. However, different segmentation methods resulted in the different distortion of the magnetic field and, consequently, in different iron loss compositions. The analysed segmentation methods exhibited different iron loss behaviour with respect to the operation points of the machine. The final finding is that analysed stator segmentations had a negligible influence on the total iron loss. Therefore, applying segmentation is an adequate measure to improve PMSMs as it enables, e.g. increase of the winding fill factor or simplifying the assembly processes, etc. Originality/value The influence of stator segmentation on iron losses was analysed. An in-depth evaluation was performed to determine how the discussed changes influence the individual iron loss components. A workflow was developed to achieve a computationally cheap homogenized model.

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Characterization of rotor losses in permanent magnet machines

Cited by 2 publications

References 11 publications

Analysis of Eddy Current Loss of 120-kW High-Speed Permanent Magnet Synchronous Motor

Analysis of Eddy Current Loss of 120-kW High-Speed Permanent Magnet Synchronous Motor

Influence of stator segmentation on iron losses in PMSMs for traction applications

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