Analytical Model for a Permanent Magnet Eddy-Current Brake With Transverse Edge Effect

The analytical model of a permanent magnet eddy current coupler (PMECC) is mainly used for evaluation of its characteristics and the initial optimization of design. Based on the equivalent magnetic circuit method, this paper carries out analytical modeling for four typical PMECCs composed of surface-mounted and interior permanent magnet, slotted and non-slotted conductor rotors, which provides a theoretical basis for the subsequent research in this paper. The basic electromagnetic characteristics of the PMECCs are investigated by the established analytical model. Simultaneously, the analytical results about permeance, flux density, torque and power are verified by FEA simulation. The analysis results show that the slotted CR will obtain a much higher power density, and the iron loss mainly exists in the CRs. In addition, the analytical and FEA results agree well, which proves the reliability of the proposed, nearly unified analytical model.

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A Novel Cage-Secondary Permanent Magnet Linear Eddy Current Brake with Wide Speed Range and its Analytical Model

IEEE Transactions on Industrial Electronics ◽

10.1109/tie.2021.3097603 ◽

2021 ◽

pp. 1-1

Author(s):

Baoquan Kou ◽

Wen Chen ◽

Yinxi Jin

Keyword(s):

Permanent Magnet ◽

Analytical Model ◽

Eddy Current ◽

Speed Range ◽

Wide Speed Range

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An Analytical Model for the Computation of No-Load Eddy-Current Losses in the Rotor of a Permanent Magnet Synchronous Machine

IEEE Transactions on Magnetics ◽

10.1109/tmag.2013.2257825 ◽

2016 ◽

Vol 52 (6) ◽

pp. 1-13 ◽

Cited By ~ 17

Author(s):

O. de la Barriere ◽

S. Hlioui ◽

H. Ben Ahmed ◽

M. Gabsi

Keyword(s):

Permanent Magnet ◽

Analytical Model ◽

Eddy Current ◽

Synchronous Machine ◽

Permanent Magnet Synchronous Machine ◽

Eddy Current Losses

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Investigation of Volumic Permanent-Magnet Eddy-Current Losses in Multi-Phase Synchronous Machines from Hybrid Multi-Layer Model

Mathematical and Computational Applications ◽

10.3390/mca25010014 ◽

2020 ◽

Vol 25 (1) ◽

pp. 14

Author(s):

Youcef Benmessaoud ◽

Daoud Ouamara ◽

Frédéric Dubas ◽

Mickael Hilairet

Keyword(s):

Permanent Magnet ◽

Analytical Model ◽

Eddy Current ◽

Separation Of Variables ◽

Fourier Method ◽

Synchronous Machines ◽

Magnetic Flux Density ◽

Layer Model ◽

Eddy Current Losses ◽

Multi Phase

This paper investigates the permanent-magnet (PM) eddy-current losses in multi-phase PM synchronous machines (PMSM) with concentric winding and surface-mounted PMs. A hybrid multi-layer model, combining a two-dimensional (2-D) generic magnetic equivalent circuit (MEC) with a 2-D analytical model based on the Maxwell–Fourier method (i.e., the formal resolution of Maxwell’s equations by using the separation of variables method and the Fourier’s series), performs the eddy-current loss calculations. First, the magnetic flux density was obtained from the 2-D generic MEC and then subjected to the Fast Fourier Transform (FFT). The semi-analytical model includes the automatic mesh of static/moving zones, the saturation effect and zones connection in accordance with rotor motion based on a new approach called “Air-gap sliding line technic”. The results of the hybrid multi-layer model were compared with those obtained by three-dimensional (3-D) nonlinear finite-element analysis (FEA). The PM eddy-current losses were estimated on different paths for different segmentations as follow: (i) one segment (no segmentation), (ii) five axial segments, and (iii) two circumferential segments, where the non-uniformity loss distribution is shown. The top of PMs presents a higher quantity of losses compared to the bottom.

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