Magnetic field analytical solution and electromagnetic force calculation of coreless stator axial-flux permanent-magnet machines

2017 ◽  
Vol 54 (1) ◽  
pp. 93-105 ◽  
Author(s):  
Yongjuan Cao ◽  
Shaoqin Tao ◽  
Jun Cai ◽  
Li Yu ◽  
Hongyun Jia ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Analytical Solution ◽  
Permanent Magnet ◽  
Electromagnetic Force ◽  
Permanent Magnet Machines ◽  
Axial Flux ◽  
Force Calculation

scholarly journals Electromagnetic Force Analysis of Eccentric Axial Flux Permanent Magnet Machines

2020 ◽  
Vol 2020 ◽  
pp. 1-16
Author(s):  
Qiaoshan Li ◽  
Bingyi Zhang ◽  
Aimin Liu
Keyword(s):  
Permanent Magnet ◽  
Electromagnetic Force ◽  
Force Density ◽  
Permanent Magnet Machines ◽  
The Finite Element Method ◽  
Force Analysis ◽  
Distribution Law ◽  
Axial Flux ◽  
Maxwell Stress Tensor ◽  
The Magnetic Field

Based on Schwarz–Christoffel mapping, this paper presents a fast analytical method to analyze the electromagnetic force of eccentric axial flux permanent magnet machines, considering static, dynamic, and mixed eccentricities. A quasi-3D model of an axial flux permanent magnet machine is established, and the magnetic field is obtained by Schwarz–Christoffel mapping. The electromagnetic force density is obtained by the Maxwell stress tensor method, and the electromagnetic force density is used to characterize the variation of electromagnetic force. The distribution law of electromagnetic force is investigated. The calculated results are verified by the finite element method, which has shown that the method in this paper can be widely used in the analysis of axial flux permanent magnet machines.

scholarly journals Magnetic Field Analytical Solution for Non-homogeneous Permeability in Retaining Sleeve of a High-Speed Permanent-Magnet Machine

2018 ◽  
Vol 23 (4) ◽  
pp. 72 ◽  
Author(s):  
Gabriel Mendonça ◽  
Thales Maia ◽  
Braz Cardoso Filho
Keyword(s):  
Magnetic Field ◽  
Analytical Solution ◽  
Permanent Magnet ◽  
High Speed ◽  
Fourier Method ◽  
Load Condition ◽  
Magnetic Flux Density ◽  
Permanent Magnet Machines ◽  
Field Calculation ◽  
Saturation Profile

This work presents a novel solution for magnetic field calculation in two-dimensional problems in which one region is defined with space-varying magnetic parameter. The proposed solution extends the well-established Maxwell–Fourier method for calculating magnetic fields in surface-mounted cylindrical high-speed permanent-magnet machines. This contribution is effective to evaluate more realistic magnetic parameters, where measurements of a high-speed permanent-magnet generator prototype indicate saturation in the retaining sleeve due to pole-to-pole leakage flux. The saturation profile is a function of mechanical angle and can be modeled with the aid of a space-varying relative permeability, expressed in terms of a Fourier series. As an example, the presented solution has been applied to a surface-mounted PM machine at no-load condition. Magnetic field calculations show that a simple saturation profile, with low order space-varying permeability in the retaining sleeve significantly affects the magnetic flux density distribution in the air-gap. The analytical solution is confronted with finite-element method, which confirms validity of the proposed methodology.

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