AFPM Machines Equipped With Multilayer Magnets

This article investigates the manufacturability and applicability of unified multilayer magnets, comprising two different magnetic materials with distinct characteristics, for use in electrical machines. In particular, the self-produced multilayer magnets are made of compressed NdFeB bonded powders...

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Vydané v:IEEE transactions on energy conversion Ročník 40; číslo 2; s. 712 - 723
Hlavní autori: Darmani, Mostafa Ahmadi, Poskovic, Emir, Franchini, Fausto, Ferraris, Luca, Cavagnino, Andrea, Gerada, Chris
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: New York IEEE 01.06.2025
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Predmet:
axial flux machines
bonded magnets
Casting
Composite materials
Configuration management
cost-efficient
FEM simulations
flux weakening
high efficiency
Hybrid composites
hybrid magnets
Magnetic flux
Magnetic materials
Magnetic multilayers
Magnetic separation
Magnets
Manufacturability
Monolayers
Multilayer permanent magnets
Multilayers
Nonhomogeneous media
Permanent magnets
Rotors
Stator windings
synchronous PM machines
Torque
variable flux machines
ISSN:0885-8969, 1558-0059
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Abstract This article investigates the manufacturability and applicability of unified multilayer magnets, comprising two different magnetic materials with distinct characteristics, for use in electrical machines. In particular, the self-produced multilayer magnets are made of compressed NdFeB bonded powders for the ' strong ' magnet layer and hybrid composite materials for the ' weak ' magnet layer. Various combinations of material for the self-produced permanent magnets are experimentally investigated. Also, the suitability of resultant multilayer bonded magnets to electrical machines is articulated on the basis of finite element simulations. To assess their performance, three axial-flux surface-mounted permanent magnet machines are constructed: one conventional machine with single-layer bonded magnets as the reference, and two machines equipped with multilayer magnets with series and parallel configurations. The performance of the machines are evaluated in terms of the back-EMF, output torque, torque ripple, losses, efficiency, and cost. The findings indicate an appreciable enhancement in flux-weakening operation for the machine equipped with multilayer magnets, but at the expense of lower flux linkage values and nominal torque. Further analyses of the multilayer magnet's trade-offs and potential applications in electrical machines are presented.
AbstractList This article investigates the manufacturability and applicability of unified multilayer magnets, comprising two different magnetic materials with distinct characteristics, for use in electrical machines. In particular, the self-produced multilayer magnets are made of compressed NdFeB bonded powders for the ' strong ' magnet layer and hybrid composite materials for the ' weak ' magnet layer. Various combinations of material for the self-produced permanent magnets are experimentally investigated. Also, the suitability of resultant multilayer bonded magnets to electrical machines is articulated on the basis of finite element simulations. To assess their performance, three axial-flux surface-mounted permanent magnet machines are constructed: one conventional machine with single-layer bonded magnets as the reference, and two machines equipped with multilayer magnets with series and parallel configurations. The performance of the machines are evaluated in terms of the back-EMF, output torque, torque ripple, losses, efficiency, and cost. The findings indicate an appreciable enhancement in flux-weakening operation for the machine equipped with multilayer magnets, but at the expense of lower flux linkage values and nominal torque. Further analyses of the multilayer magnet's trade-offs and potential applications in electrical machines are presented.
Author Franchini, Fausto
Darmani, Mostafa Ahmadi
Cavagnino, Andrea
Gerada, Chris
Poskovic, Emir
Ferraris, Luca
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  organization: Power Electronics, Machines and Control (PEMC) Research Group of University of Nottingham, Nottingham, U.K
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SubjectTerms axial flux machines
bonded magnets
Casting
Composite materials
Configuration management
cost-efficient
FEM simulations
flux weakening
high efficiency
Hybrid composites
hybrid magnets
Magnetic flux
Magnetic materials
Magnetic multilayers
Magnetic separation
Magnets
Manufacturability
Monolayers
Multilayer permanent magnets
Multilayers
Nonhomogeneous media
Permanent magnets
Rotors
Stator windings
synchronous PM machines
Torque
variable flux machines
Title AFPM Machines Equipped With Multilayer Magnets
URI https://ieeexplore.ieee.org/document/10584293
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Volume 40
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