Experimental Validation of 3-D Magnet Eddy Current Loss Prediction in Surface-Mounted Permanent Magnet Machines

Nair, Sreeju S.; Wang, Jiabin; Sun, Tianfu; Chen, Liang; Chin, Robert; Beniakar, Minos E.; Svechkarenko, Dmitry; Manolas, Iakovos

doi:10.1109/tia.2017.2707078

Cited by 15 publications

(5 citation statements)

References 25 publications

(38 reference statements)

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“…A methodology based on the 3-D Fourier Transform (3-D FFT) method has already been proposed in the literature [89]. Moreover, a technique has been introduced, enabling evaluation of eddy current losses in permanent magnets, by using a 2-D Finite Element Modeling (2-D FEA) combined with differential resistance concept in the magnet's end regions.…”

Section: Combined Permanent Magnet and Lamination Loss Modellingmentioning

confidence: 99%

Overview on Permanent Magnet Motor Trends and Developments

Vlachou,

Sakkas,

Xintaropoulos

et al. 2024

Energies

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The extreme environmental issues and the resulting need to save energy have turned attention to the electrification of energy applications. One of the key components involved in energy efficiency improvements is the appropriate conception and manufacturing of electric machines. This paper overviews the electromagnetic analysis governing the behavior of permanent magnets that enable substantial efficiency gains in recent electric machine developments. Particular emphasis is given to modeling the properties and losses developed in permanent magnets in emerging high speed applications. In addition, the investigation of properties and harmonic losses related to ferromagnetic materials constituting the machine magnetic circuits are equally analyzed and discussed. The experimental validation of the implemented methodologies and developed models with respect to the obtained precision is reported. The introduction of mixed numerical techniques based on the finite element method intended to appropriately represent the different physical phenomena encountered is outlined and discussed. Finally, fast and accurate simulation techniques including aggregated lumped parameter models considering harmonic losses associated with inverter supplies are discussed.

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Section: Combined Permanent Magnet and Lamination Loss Modellingmentioning

confidence: 99%

Overview on Permanent Magnet Motor Trends and Developments

Vlachou,

Sakkas,

Xintaropoulos

et al. 2024

Energies

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“…Thus, eddy current losses on the Can stretched out the core segment, circulating current losses between the Can and other end structures should continue to be calculated by 3D FEM. To calculate these two kinds of losses, the principle of superposition is adopted [21]. Three models corresponding to three cases are established.…”

Section: Fig 4 Eddy Current Density Of Partial Solving Modelmentioning

confidence: 99%

Evaluation of Can eddy current losses and Can circulating current losses between the Can and end structures in double canned induction motors

Gao

Wang

Liang

et al. 2019

IET Electric Power Applications

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The stator Can and rotor Can are unique structures in double canned induction motors, and Can losses include Can eddy current losses and Can circulating current losses between the Can and other end structures. However, the current research of Can losses is mainly focused on Can eddy current losses, and operation conditions are limited to the no-load condition, rated-load condition and start condition. Aiming at this problem, two kinds of Can losses are calculated and analysed in details. The influence factors are researched. Based on this, a reduction method of Can losses is proposed, and the efficiency curve is provided. Calculation results are compared with test values to validate the accuracy of the solving model. The reliable basis is provided for reducing Can losses in double canned induction motors.

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“…Even though several papers demonstrate the importance of taking into account magnet length for various PM topologies [20]- [25], no existing harmonic loss model considers ringshaped rotor magnets of finite length. Therefore, this paper presents a unique model for prediction of time-harmonic losses in a 2-pole slotless machine with ring-shaped magnets, taking into account saturation, axial segmentation and eddy-current shielding effects.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Harmonic Losses in a Two-Pole Slotless Permanent-Magnet Motor Due to Wide Bandgap Inverter Supply

Millinger¹,

Wallmark²,

Soulard³

2020

IEEE Trans. Ind. Electron.

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The recent emerge of wide band-gap power devices enables higher switching frequencies in electric motor drives. The subsequent possibility for higher efficiency and smaller size requires accurate prediction of harmonic losses in motors. Therefore this paper presents an original analysis of harmonic losses arising in inverter-fed 2-pole slotless permanent-magnet machines with axially segmented ring magnets. The developed three-dimensional time-efficient numerical model is successfully validated under high-speed no-load operation using a silicon-carbide based three-phase inverter and rotors carrying a broad range of magnet segment thicknesses (3-12.6 mm). The model enables harmonic loss prediction capability (including loss separation) with an accuracy of 15 % over a wide frequency range (8-120 kHz), which is a unique contribution. The sensitivity analysis primarily emphasizes the importance of taking into account the axial segmentation, and secondarily the rotor-shaft magneto-elasticity effects for accurate modeling of harmonic losses. The conducted case-study demonstrates that wide band-gap transistors effectively can contribute to eliminating the need for inductive filters in motor drives. Index Terms-Time-harmonic losses, permanent-magnet machines, wide band-gap semiconductors.

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Experimental Validation of 3-D Magnet Eddy Current Loss Prediction in Surface-Mounted Permanent Magnet Machines

Cited by 15 publications

References 25 publications

Overview on Permanent Magnet Motor Trends and Developments

Overview on Permanent Magnet Motor Trends and Developments

Evaluation of Can eddy current losses and Can circulating current losses between the Can and end structures in double canned induction motors

Investigation of Harmonic Losses in a Two-Pole Slotless Permanent-Magnet Motor Due to Wide Bandgap Inverter Supply

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