scholarly journals Novel rotors with low eddy current loss for high speed permanent magnet machines

2019 ◽  
Vol 3 (2) ◽  
pp. 187-194
Author(s):  
Xin Cheng ◽  
Wei Xu ◽  
Guanghui Du ◽  
Guohui Zeng ◽  
Jianguo Zhu
Keyword(s):  
Permanent Magnet ◽  
Eddy Current ◽  
High Speed ◽  
Eddy Current Loss ◽  
Permanent Magnet Machines ◽  
Current Loss

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.

Reduction of Eddy-Current Loss in Flux-Switching Permanent-Magnet Machines Using Rotor Magnetic Flux Barriers

2017 ◽  
Vol 53 (11) ◽  
pp. 1-5 ◽  
Author(s):  
Jianhua Luo ◽  
Wenxiang Zhao ◽  
Jinghua Ji ◽  
Junqiang Zheng ◽  
Ying Zhang ◽  
...  
Keyword(s):  
Magnetic Flux ◽  
Permanent Magnet ◽  
Eddy Current ◽  
Eddy Current Loss ◽  
Permanent Magnet Machines ◽  
Current Loss
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