A gear efficiency improvement in magnetic gear by eddy-current loss reduction

2019 ◽  
Vol 60 (1) ◽  
pp. 103-112 ◽  
Author(s):  
Eui-Jong Park ◽  
Chan-Seung Gim ◽  
Sang-Yong Jung ◽  
Yong-Jae Kim
Keyword(s):  
Eddy Current ◽  
Eddy Current Loss ◽  
Loss Reduction ◽  
Efficiency Improvement ◽  
Current Loss ◽  
Gear Efficiency ◽  
Magnetic Gear

Performance analysis of magnetic gear with Halbach array for high power and high speed

2020 ◽  
Vol 64 (1-4) ◽  
pp. 959-967
Author(s):  
Se-Yeong Kim ◽  
Tae-Woo Lee ◽  
Yon-Do Chun ◽  
Do-Kwan Hong
Keyword(s):  
Permanent Magnet ◽  
Eddy Current ◽  
High Power ◽  
High Speed ◽  
Torque Ripple ◽  
Eddy Current Loss ◽  
Element Analysis ◽  
Current Loss ◽  
Halbach Array ◽  
Magnetic Gear

In this study, we propose a non-contact 80 kW, 60,000 rpm coaxial magnetic gear (CMG) model for high speed and high power applications. Two models with the same power but different radial and axial sizes were optimized using response surface methodology. Both models employed a Halbach array to increase torque. Also, an edge fillet was applied to the radial magnetized permanent magnet to reduce torque ripple, and an axial gap was applied to the permanent magnet with a radial gap to reduce eddy current loss. The models were analyzed using 2-D and 3-D finite element analysis. The torque, torque ripple and eddy current loss were compared in both models according to the materials used, including Sm2Co17, NdFeBs (N42SH, N48SH). Also, the structural stability of the pole piece structure was investigated by forced vibration analysis. Critical speed results from rotordynamics analysis are also presented.

Eddy current loss reduction of superconducting magnets for MAGLEV with a multilayer superconducting sheet

1997 ◽  
Vol 7 (2) ◽  
pp. 912-915 ◽  
Author(s):  
M. Arata ◽  
M. Kawai ◽  
T. Yamashita ◽  
M. Fujita ◽  
T. Hamajima ◽  
...  
Keyword(s):  
Eddy Current ◽  
Superconducting Magnets ◽  
Eddy Current Loss ◽  
Loss Reduction ◽  
Current Loss
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