Halbach structure parameter optimization by Maxwell tensor method for PML in manned hybrid maglev

• Published in: Journal of magnetism and magnetic materials 2024-11, Vol.610, p.172566, Article 172566
• Main Authors: Sun, Ruixue, Zheng, Jun, Li, Haitao, Xiang, Shulan, Jiang, Weian
• Format: Article
• Language: English
• Subjects: Halbach array; Lateral stiffness; Levitation force; Magnetic flux density; Maxwell tensor method; Permanent magnetic levitation(PML)
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2024.172566

•Identify four key parameters for magnetic flux density optimization.•Derive levitation force formulas using Maxwell tensor method.•Visualize parameter interactions with contour plots. This paper presents an optimization of the Halbach structure parameters for the permanent magnetic levitation (PML) component in manned hybrid maglev system using Maxwell tensor method. The focus is on enhancing the levitation force and reducing the lateral stiffness, which are important for improving the system’s load capacity and lateral stability. Based on the analysis of the magnetic flux density formula as presented by Halbach (1985), seven structural parameters were reduced to four independent variables. The Maxwell tensor formulation enabled the derivation of analytical expressions for the levitation force and stiffness, leading to identification of parametier conbinations that maximize magneitc properties. Contour plots were constructed to visually demonstrate the impact of parameter variations on magnetic characteristics, including magnetic flux density, levitation force, and lateral stiffness. Ultimately, a series of optimization cases for structural parameters were proposed in accordance with the design requirements of the manned hybrid Maglev system, and these cases were comprehensively evaluated through contour plot analysis. Furthermore, the finite element software FEMM was utilized to model and validate the optimal cases, thereby confirming the effectiveness of the analytical expressions for magnetic properties and the optimization strategy. This research not only provides theoretical support for the design of PML components but also offers new insights into the optimization of magnetic characteristics for hybrid maglev systems.