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Analysis of the magnetic field and the magnetic force in a magnetic clutch of the automotive air conditioner

机译：磁场分析汽车空调磁离合器中的磁力

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This paper investigated the characteristics of the magnetic field and the attractive magnetic force in a magnetic clutch of the automotive air conditioner. The magnetic force was calculated by using the finite element method, the principle of virtual work and the Maxwell stress tensor, and it was measured by experiment. Magnetic field is not affected by the pulley groove and the attractive magnetic force is also not significantly affected by the bearing because the total magnetic field in the airgap is not changed. The magnetic force increases rapidly as the airgap decreases. The bridges in the disk and the pulley decrease the magnetic force because they create the radial flux to saturation and reduce the effective axial magnetic flux in the airgap to the amount of the radial magnetic flux flowing in the bridges. Also the magnetic force is decreased proportionally as the increase of the cross-sectional area of the bridge.
机译：本文研究了磁场的特性和汽车空调的磁性离合器中的吸引磁力。通过使用有限元方法，虚拟工作原理和麦克斯韦压力张量的原理计算磁力，并通过实验测量。磁场不受滑轮槽的影响，并且具有轴承的吸引力的磁力也不会显着影响，因为气隙中的总磁场不会改变。随着气隙的降低，磁力迅速增加。盘中的桥梁和皮带轮降低了磁力，因为它们会产生径向通量到饱和，并将气隙中的有效轴向磁通量降低到在桥梁中流动的径向磁通量的量。由于桥的横截面积的增加，磁力成比例地降低。

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