scholarly journals Analysis and optimisation of an axial flux permanent magnet coreless motor based on the field model using the superposition principle and genetic algorithm

2016 ◽  
Vol 65 (3) ◽  
pp. 601-611 ◽  
Author(s):  
Rafał M. Wojciechowski
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Field Model ◽  
Superposition Principle ◽  
Electromagnetic Torque ◽  
Axial Flux ◽  
Magnetic Field Simulation ◽  
Field Distributions ◽  
Field Simulation ◽  
The Magnetic Field

Abstract In the paper, methodologies for the magnetic field simulation in an axial flux permanent magnet coreless (AFPMC) motor have been proposed and discussed. Two approaches have been considered and investigated, both based on representing the 3D field distribution by superimposing axisymmetric 2D patterns. The first of studied approaches applies directly to the Biot-Savart law while the second uses a 2D axisymmetric finite element method. The selected results of magnetic field distributions and electromagnetic torque characteristics for the considered AFPMC motor have been presented and compared with results obtained using the commercial FEM package ‘Maxwell’. The elaborated algorithms have been incorporated into the design routines allowing multi-parameter optimisation of the considered motor construction.

scholarly journals Analysis of Magnetic Forces in Axial-Flux Permanent-Magnet Motors with Rotor Eccentricity

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Xiaoting Zhang ◽  
Bingyi Zhang
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Air Gap ◽  
Computational Time ◽  
End Effect ◽  
Permanent Magnet Motors ◽  
Axial Flux ◽  
Magnetic Forces ◽  
Rotor Eccentricity ◽  
The Magnetic Field

In this study, an analytical model is established to efficiently compute the magnetic field and unbalanced magnetic pull (UMP) in axial-flux permanent-magnet motors (AFPMMs). The effects of stator slotting, end effect, and rotor eccentricity on the magnetic field and forces were investigated. Static and dynamic eccentricities are analyzed and considered in the model. An effective function of the air gap permeance was introduced for effect of the stator slots to compute the flux density. A specific coefficient function is defined to calculate the end effect. A Fourier transform is used to compute the variations of the permanent-magnet remanence and the air gap permeance due to the slotted stator opposite to a slotless stator. The unbalanced magnetic forces were evaluated as a function of the air gap magnetic field using analytical equations. The proposed analytical method dramatically reduces the model size and computational time. It can be applied to the analysis of AFPMMs and is much faster than the three-dimensional finite element method (FEM). By comparing with the obtained using the FEM, the model results are validated.

The Design of Small H-Style Permanent Magnet Used for NMR

2014 ◽  
Vol 703 ◽  
pp. 114-118
Author(s):  
Guang Cai Zhang ◽  
Hong Fu Ai ◽  
Ya Jie Xu ◽  
Qiao Yan Chen ◽  
Xiao Dong Yang
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Static Magnetic Field ◽  
Simulation Analysis ◽  
Magnetic Actuator ◽  
Permanent Magnetic Actuator ◽  
Performance Requirements ◽  
Magnetic Field Simulation ◽  
Field Simulation ◽  
3D Software

This paper introduces the design of permanent magnet that can been used to small nuclear magnetic resonance (NMR) system, and its static magnetic field simulation analysis uses Ansoft's Maxwell software. According to the theory of magnetic circuit design and the performance requirements of magnetic field, An H-style permanent magnetic actuator has been designed, and it can generate uniform magnetic field larger than 0.4 T in the interested region of this actuator. The static magnetic field simulation analysis of this permanent magnetic actuator has done by Ansoft's Maxwell 3D software, and the experimental results show that the design of permanent magnet can meet the requirements.

Driving System Design of Lifting Permanent Magnet

2013 ◽  
Vol 765-767 ◽  
pp. 125-128 ◽  
Author(s):  
Ning Ding ◽  
Ding Tong Zhang ◽  
Yu Mei Song ◽  
Jian Shi ◽  
Li Gong Ding
Keyword(s):  
Magnetic Field ◽  
System Design ◽  
Permanent Magnet ◽  
Permanent Magnets ◽  
Superposition Principle ◽  
Drive System ◽  
Driving System ◽  
The Magnetic Field

Based on our proposed superposition principle of the magnetic field, the drive system of parallel moving type and rotation moving type lifting permanent magnet were designed. Industry prototypes were manufactured, respectively, and they verify that the designed lifting permanent magnets are feasible.

scholarly journals Modeling of Axial Flux Permanent Magnet Generators

Energies ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5741
Author(s):  
Natalia Radwan-Pragłowska ◽  
Tomasz Węgiel ◽  
Dariusz Borkowski
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Laboratory Tests ◽  
Iron Core ◽  
Full Model ◽  
Axial Flux ◽  
Permanent Magnet Generators ◽  
The Magnetic Field ◽  
Simplified Mathematical Model ◽  
Optimal Machine

This article focuses on modeling of an Axial Flux Permanent Magnet Generator (AFPMG). The authors analyzed selected variants of disk generators, including coreless stator constructions and with iron core ones, also taking into account the Permanent Magnet (PM) arrangement in order to show the way to obtain the optimal machine characteristics based on analytical equations. In addition to the full model, which takes into account the higher harmonics of the magnetic field distribution, the paper presents a simplified mathematical model developed for generator operation cases such as standalone, connected to a 3-phase power grid and loaded with a diode rectifier. The analytical and finite-element method (FEM) calculations were performed as well as laboratory tests to confirm the correctness of presented model assumptions.

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