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一、引言有着极高各向异性场的稀土钴永磁体,可以看成具有均匀微观磁化强度的均匀磁化体。由于它的μ_r→1,退磁曲线直线性较好,因此磁体在空间产生的磁场,磁体间产生的吸引力和排斥力的计算问题可以按等效的表面电流壳模型来处理,同样也可用“磁荷”概念引入磁库伦定律来处理。国内外已有一些研究,结果表明计算结果和实验结果符合较好。这样稀土钴永磁的磁路设计就有可能形成一个特有的方法。过去基于安培环路定律、高斯定理,还引入了漏磁系数K_f,磁阻系数K_r和有关经验图表进行磁路设计。现在则可从两方面进行:1.应用电流壳或磁壳模型,具体对磁路采用毕奥—沙伐尔定
I. INTRODUCTION Rare earth cobalt permanent magnets with a very high anisotropy field can be considered as homogeneous magnetizers with uniform microscopic magnetization. Due to its μ_r → 1, the demagnetization curve has good linearity, so the magnetic field generated by the magnet in the space and the calculation of the attraction and repulsion force generated between the magnets can be treated according to the equivalent surface current shell model, and the “ Magnetic charge ”concept into the magnetic Coulomb law to deal with. Some researches have been done at home and abroad, and the results show that the calculated results are in good agreement with the experimental results. Such rare earth cobalt permanent magnet magnetic circuit design may form a unique method. The past based on the law of Ampere loop, Gauss theorem, but also the introduction of leakage magnetic coefficient K_f, reluctance K_r and the relevant experience chart magnetic circuit design. Now it can be carried out from two aspects: 1.Application of current shell or magnetic shell model, the specific magnetic circuit using Biot-Salvarin