Torque and Loss Characteristics of Magnetic Gear by Bonded PM Magnetization Direction

As coaxial magnetic gears use NdFeB permanent magnets with high-energy density, they have a torque density comparable to that of mechanical gears, and active research activities have been conducted since. However, NdFeB permanent magnets have conductivity and cause high permanent magnet eddy current...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2021-06, Vol.57 (6), p.1-4
Main Authors: Park, Eui-Jong, Jung, Sang-Yong, Kim, Yong-Jae
Format: Article
Language:English
Subjects:
Bonding strength
Coaxial magnetic gear
Current loss
Eddy currents
experiment
finite element analysis (FEA)
Finite element method
Flux density
Gears
Magnetic fields
Magnetic flux
Magnetic gears
Magnetism
Magnetization
Nd-bonded
Neodymium
Permanent magnets
Rotors
Torque
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Summary:As coaxial magnetic gears use NdFeB permanent magnets with high-energy density, they have a torque density comparable to that of mechanical gears, and active research activities have been conducted since. However, NdFeB permanent magnets have conductivity and cause high permanent magnet eddy current losses due to the driving characteristics of coaxial magnetic gears. Ferrite has no conductivity, but because of its weak magnetic force, its competitiveness is poor. In this article, Nd-bonded permanent magnet which has high magnetic force and no conductivity is used. Finite element analysis (FEA) calculations and experimental results of coaxial magnetic gears using Nd-bonded permanent magnets were compared, and the direction of applying Nd-bonded to coaxial magnetic gears was presented by comparing the magnetization method of Nd-bonded.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2021.3064705