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基于磁路电路等效性原理,构建了混合悬浮系统的数学模型,并从承载力、可控性及永磁工作点对混合悬浮磁铁进行了优化设计。对于设计的混合磁铁,进行了刚度问题的分析,推导了刚度与永久磁铁截面积及厚度的关系,并导出在最优间隙反馈系数下混合磁铁结构的最优悬浮刚度。有限元仿真结果表明,适当增加永久磁铁的截面积能提高混合磁铁的承载能力、可控性及悬浮刚度,并使永磁材料工作于最大能积点附近。
Based on the principle of equivalent circuit of magnetic circuit, a mathematical model of hybrid suspension system is constructed, and the hybrid suspension magnet is optimally designed from the bearing capacity, controllability and permanent magnet working point. For the designed hybrid magnet, the stiffness problem was analyzed, the relationship between stiffness and the cross-sectional area and thickness of the permanent magnet was deduced, and the optimal suspension stiffness of the hybrid magnet structure under the optimal backlash coefficient was deduced. Finite element simulation results show that increasing the cross-sectional area of the permanent magnet can increase the carrying capacity, controllability and suspension stiffness of the hybrid magnet, and make the permanent magnetic material work near the maximum energy point.