scholarly journals Direct reuse strategies of rare earth permanent magnets for PM electrical machines – an overview study

2019 ◽  
Vol 86 (2) ◽  
pp. 20901
Author(s):  
Ziwei Li ◽  
Afef Kedous-Lebouc ◽  
Jean-Marc Dubus ◽  
Lauric Garbuio ◽  
Sophie Personnaz
Keyword(s):  
Rare Earth ◽  
Permanent Magnet ◽  
End Of Life ◽  
Permanent Magnets ◽  
State Of The Art ◽  
The State ◽  
Electrical Machines ◽  
Heavy Rare Earth

The global supply of heavy rare earth magnets can become risky with the soaring demand of rare earth permanent magnet (PM) machines. One of the promising solutions is to reuse or recycle permanent magnets from end-of-Life electrical machines. This paper is an overview study of the state-of-the-art permanent magnet reuse and recycling research for electrical machines. Some methodologies for quantifying the recyclability of permanent magnet of electrical machines are also introduced.

Handling and Fixation of Permanent Magnets

2013 ◽  
Vol 769 ◽  
pp. 3-10 ◽  
Author(s):  
Jan Tremel ◽  
Benjamin Hofmann ◽  
Florian Risch
Keyword(s):  
Rare Earth ◽  
Permanent Magnet ◽  
Electric Vehicles ◽  
Permanent Magnets ◽  
Electrical Machines ◽  
Research Projects ◽  
Fixation Methods ◽  
High Efficient ◽  
The Family

Due to rapid developments within the family of rare-earth materials innovative electrical machines can nowadays be used as high efficient generators in various power, as well as rugged constructed machines for automobile battery based propulsion in hybrid and full electric vehicles. The production of different motor concepts spread into different design variants and creates complex variations especially regarding the rotor. Deriving from various research projects, the handling of the permanent magnet components is investigated, including the development of new assembly and fixation methods.

scholarly journals Re-Use and Recycling of Different Electrical Machines

2018 ◽  
Vol 55 (4) ◽  
pp. 13-23 ◽  
Author(s):  
A. Rassõlkin ◽  
A. Kallaste ◽  
S. Orlova ◽  
L. Gevorkov ◽  
T. Vaimann ◽  
...  
Keyword(s):  
Rare Earth ◽  
Permanent Magnet ◽  
Induction Motor ◽  
Permanent Magnets ◽  
Electrical Machines ◽  
Main Attention ◽  
Base Materials ◽  
Synchronous Reluctance Motor ◽  
Reluctance Motor

Abstract The paper discusses the current developments in the recycling of electrical machines. The main attention is devoted to three types of motors: synchronous reluctance motor, permanent magnet assisted synchronous reluctance motor, and induction motor. Base materials of such electrical machines are also described in the paper. Rare-earth permanent magnets used in electrical machines are review separately. Moreover, the paper considers the features of the disassembly and recycling options.

scholarly journals Magnetic Gears and Magnetically Geared Machines with Reduced Rare-Earth Elements for Vehicle Applications

2021 ◽  
Vol 12 (2) ◽  
pp. 52
Author(s):  
Ali Al-Qarni ◽  
Ayman EL-Refaie
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Permanent Magnet ◽  
Electric Vehicles ◽  
Scaling Up ◽  
Electrical Machines ◽  
Mechanical Structure ◽  
Physical Isolation ◽  
Rotational Components ◽  
Rare Earth Content

This paper covers a new emerging class of electrical machines, namely, Magnetic Gears (MGs) and Magnetically Geared Machines (MGMs). This particular kind of gears/machines is capable of either scaling up or down the revolutions-per-minute to meet various load profiles as in the case of mechanical gearboxes, but with physical isolation between the rotating components. This physical isolation between the rotational components leads to several advantages in favor of MGs and MGMs over mechanical gearboxes. Although MGs and MGMs can potentially provide a solution for some of the practical issues of mechanical gears, MGs and MGMs have two major challenges that researchers have been trying to address. Those challenges are the high usage of rare-earth Permanent Magnet (PM) materials and the relatively complex mechanical structure of MGs and MGMs, both of which are a consequence of the multi-airgap design. This paper presents designs that reduce the PM rare-earth content for Electric Vehicles (EVs). Additionally, the paper will ensure having practical designs that do not run the risk of permanent demagnetization. The paper will also discuss some new designs to simplify the mechanical structure.

Using Chlorine Gas to Recover Rare Earth Metals from End-of-Life Permanent Magnets

JOM ◽  
2021 ◽  
Author(s):  
Valery Kaplan ◽  
Ellen Wachtel ◽  
Konstantin Gartsman ◽  
Yishay Feldman ◽  
Kyoung-Tae Park ◽  
...  
Keyword(s):  
Rare Earth ◽  
End Of Life ◽  
Permanent Magnets ◽  
Rare Earth Metals ◽  
Chlorine Gas

scholarly journals Additive manufacturing of heavy rare earth free high-coercivity permanent magnets

2020 ◽  
Vol 188 ◽  
pp. 733-739 ◽  
Author(s):  
A.S. Volegov ◽  
S.V. Andreev ◽  
N.V. Selezneva ◽  
I.A. Ryzhikhin ◽  
N.V. Kudrevatykh ◽  
...  
Keyword(s):  
Rare Earth ◽  
Additive Manufacturing ◽  
Permanent Magnets ◽  
High Coercivity ◽  
Heavy Rare Earth

Static Devices with New Permanent Magnets

1987 ◽  
Vol 96 ◽  
Author(s):  
J. Chavanne ◽  
J. Laforest ◽  
R. Pauthenet
Keyword(s):  
Corrosion Resistance ◽  
Rare Earth ◽  
Permanent Magnet ◽  
Special Interest ◽  
Permanent Magnets ◽  
Uniaxial Anisotropy ◽  
Temperature Behaviour ◽  
Metal Compounds ◽  
New Concepts ◽  
Permanent Magnet Materials

ABSTRACTThe high remanence and coercivity of the new permanent magnet materials are of special interest in the static applications. High ordering temperature and large uniaxial anisotropy at the origin of their good permanent magnet properties are obtained in rare earth-transition metal compounds. Binary SmCo5 and Sm2Co17 and ternary Nd2Fe14B compounds are the basis materials of the best permanent magnets. New concepts of calculations of static devices with these magnets can be applied : the magnetization can be considered as rigid, the density of the surface Amperian current is constant, the relative permeability is approximately 1 and the induction calculations are linear. Examples of hexapoles with Sm-Co and NdFeB magnets are described and the performances are compared. The problems of temperature behaviour and corrosion resistance are underlined.

Magnetic Hardening Mechanism in Sintered R-Fe-B Permanent Magnets

1987 ◽  
Vol 96 ◽  
Author(s):  
M. Sagawa ◽  
S. Hirosawa
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnets ◽  
State Of The Art ◽  
Spontaneous Magnetization ◽  
Experimental Results ◽  
Surface Conditions ◽  
Hardening Mechanism ◽  
Sintered Magnets ◽  
Field Coefficient ◽  
Magnetic Hardening

ABSTRACTThe state-of-the-art description of the magnetic hardening mechanism in the sintered Nd-Fe-B permanent magnet is given. Recent experimental results concerning the coercivity-anisotropy (Hc -HA) correlation in B-rich Pr-Fe-B and Nd-Fe-B sintered magnets and the inhluence of the surface conditions of the sintered Nd-Fe-B magnets on the coercivity are reported. These results are interpreted in terms of the μ0Hc versus cμ0 HA -NIS plot, where I is the spontaneous magnetization of R2 Fe14 (R=Pr or Nd) and N the effective demagnetization field coefficient.

scholarly journals RARE-EARTH PERMANENT MAGNETS AND THEIR APPLICATION IN MAGNETIC SYSTEMS OF TECHNOLOGICAL ELECTRON ACCELERATORS

2021 ◽  
pp. 46-51
Author(s):  
V.A. Bovda ◽  
A.M. Bovda ◽  
I.S. Guk ◽  
V.N. Lyashchenko ◽  
A.O. Mytsykov ◽  
...  
Keyword(s):  
Electron Beam ◽  
Rare Earth ◽  
Permanent Magnet ◽  
Radiation Resistance ◽  
High Performance ◽  
Permanent Magnets ◽  
Magnetic Systems ◽  
Electron Accelerators ◽  
Advanced Production ◽  
Process Method

High performance rare-earth permanent magnets become crucial components of modern electron accelerators. PLP (pressless process) method was described as the advanced production step in the current rare-earth permanent magnet manufacturing. The radiation resistance of SmCo and Nd-Fe-B magnets under electron beam with 10 and 23 MeV and bremsstrahlung were studied. Dipole magnetic systems on the base of rare-earth permanent magnets were designed for the technological electron accelerators at NSC KIPT.

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