scholarly journals Accurate modelling based on a subdomain method for heteropolar radial magnetic bearing with a solid rotor

2021 ◽  
Author(s):  
Chunmin Yu ◽  
Zhiquan Deng ◽  
Lei Mei ◽  
Shangsi Chen ◽  
Cong Peng ◽  
...  
Keyword(s):  
Magnetic Bearing ◽  
Subdomain Method ◽  
Radial Magnetic Bearing

Subdomain Method for Permanent Magnet Biased Homo-Polar Radial Magnetic Bearing

2016 ◽  
Vol 52 (7) ◽  
pp. 1-5 ◽  
Author(s):  
Kang Wang ◽  
Dong Wang ◽  
Yang Shen ◽  
Xianbiao Zhang ◽  
Junquan Chen ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
Magnetic Bearing ◽  
Subdomain Method ◽  
Radial Magnetic Bearing

Magnetic Force Characteristics and Structure of a Novel Radial Hybrid Magnetic Bearing

2012 ◽  
Vol 150 ◽  
pp. 69-74
Author(s):  
Jun Hui Chen ◽  
Feng Yu Yang ◽  
Chao Rui Nie ◽  
Jun Yang ◽  
Peng Yan Wan
Keyword(s):  
Flux Density ◽  
Equilibrium Position ◽  
Magnetic Force ◽  
Magnetic Bearing ◽  
Air Gap ◽  
Magnetic Flux Density ◽  
Initial Current ◽  
Virtual Displacement ◽  
Self Stabilization ◽  
Radial Magnetic Bearing

There are some problems in the permanent magnetic circuit of the current permanent magnet biased magnetic bearings, such as small magnetic force, low magnetic flux density and lack of self-stabilization. To solve this problem, a new hybrid radial magnetic bearing structure has been proposed. The nonlinear model and linearization equation of the new hybrid radial magnetic bearing capacity has been established by current molecular method and virtual displacement theorem. It is found that the permanent magnetic bearing can achieve self-stabilization in the radial degrees of freedom and can reduce the total displacement of negative stiffness. The results show that the air gap flux density is greatly improved by the new hybrid magnetic bearing with Halbach array structure. Current stiffness and displacement rigidity is closely related to initial current and initial gap of the equilibrium position. Near the equilibrium position, current stiffness and displacement rigidity are linear relationship. With the increase of air gap, it remains a good linearity. While with the decrease of air gap, it presents nonlinear characteristics..

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