In the active magnetic bearing (AMB) system, the eddy current is generated during the rotation of the rotor, which brings about the AMB loss and eddy-current magnetic field. The eddy-current magnetic field will reduce the electromagnetic force and generate the resistance torque of the AMB. Basing on the AM-B of the Primary Helium Circulator(PHC) in HTR-PM, two-dimensional (2D) and three-dimensional (3D) AMB models are built and analyzed with finite element analysis (FEA) in maxwell. The 2D FEA shows that the eddy-current loss and the resistance torque increase as the rotor speed increases, and the eddy-current magnetic field will affect the air-gap magnetic field and reduce the electromagnetic force. The 3D FEA shows that dividing the rotor in insulate sheets can reduce the eddy-current loss. The loss and the sheets thickness have a linear relationship, which is different from the theoretical analysis.
展开▼
机译:在主动磁轴承(AMB)系统中,在转子旋转过程中会产生涡流,这会导致AMB损耗和涡流磁场。涡流磁场将减小电磁力并产生AMB的电阻扭矩。基于HTR-PM中主氦循环器(PHC)的AM-B,建立了二维(2D)和三维(3D)AMB模型,并在maxwell中进行了有限元分析(FEA)进行了分析。二维有限元分析表明,涡流损耗和电阻转矩随着转子转速的增加而增大,涡流磁场将影响气隙磁场并减小电磁力。 3D FEA显示,将转子分成绝缘片可以减少涡流损耗。损耗和片材厚度具有线性关系,这与理论分析不同。
展开▼