1. Torque and Loss Characteristics of Magnetic Gear by Bonded PM Magnetization Direction
- Author
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Eui-Jong Park, Yong-Jae Kim, and Sang-Yong Jung
- Subjects
010302 applied physics ,Materials science ,Magnetic gear ,Torque density ,01 natural sciences ,Electronic, Optical and Magnetic Materials ,law.invention ,Magnetic field ,Magnetization ,Neodymium magnet ,law ,Magnet ,0103 physical sciences ,Eddy current ,Physics::Accelerator Physics ,Electrical and Electronic Engineering ,Coaxial ,Composite material - Abstract
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.
- Published
- 2021