Nonlinear Calculation of Active Magnetic Bearings Dynamic Magnetic Field by Finite Element Method
Nonlinear Calculation of Active Magnetic Bearings Dynamic Magnetic Field by Finite Element Method
复制标题
主动磁力轴承动态磁场的有限元非线性计算
DOI：
10.4028/www.scientific.net/amm.392.285
复制
发表时间：
2013-09
期刊：
影响因子：
--
通讯作者：
Gao Bin
中科院分区：
文献类型：
--
作者：
Ding Guoping;Gao Bin
主动磁力轴承的开环不稳定性使得动态磁场的特征对控制性能至关重要。我们提出了利用有限元法对 AMB 动态磁场进行非线性计算。首先，构建了考虑磁体非线性磁导率的AMB动态场有限元模型；其次，我们通过 160 个负载步骤和零磁势边界条件向线圈施加谐波电流；最后求解磁场并检索和分析磁通线、气隙磁通密度和涡流密度。由于涡流的非线性，气隙磁通密度不是标准谐波，滞后于源电流，并且随着磁化能量均衡涡流损耗，气隙磁通密度接近谐波。
Active magnetic bearings open-loop instability makes the features of dynamic magnetic field crucial to the control performance. We presented a nonlinear calculation of AMBs dynamic magnetic field by FEM. Firstly, we constructed a AMBs dynamic field FEM model considering the magnets nonlinear permeability; Secondly, we applied a harmonic current to the coils through 160 load steps and a zero magnetic potential boundary condition; Finally the field was solved and magnetic flux lines, air gap flux density and eddy current density were retrieved and analyzed. Because of the nonlinearity of eddy current, air gap flux density is not standard harmonic and lags behind the source current,and as magnetizing energy equalizes eddy current losses, air gap flux density approaches harmonic.
影响因子：
2.1
作者：
L. S. Stephens;M. Casemore
通讯作者：
L. S. Stephens;M. Casemore
影响因子：
2.1
作者：
G. Štumberger;D. Dolinar;U. Palmer;K. Hameyer
通讯作者：
G. Štumberger;D. Dolinar;U. Palmer;K. Hameyer