The LIM has the second longitudinal end effect caused by eddy currents in secondary plate in its operation, which reduces its available magnetic flux of air gap and pull coefficient.

单边直线感应电机运行中因次级板产生涡流而存在第二类纵向边缘效应，造成气隙有效磁通和牵引力系数降低。

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The adoption of hybrid magnetic circuit structure in permanent magnet motors can effectively increase air gap flux density.

永磁电机中采用混合式磁路结构能有效地提高气隙磁通密度。

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To keep leakage flux to be constant, the relation is analyzed between the air gap length and the non-magnetic material thickness with the rare earth magnet thickness under the air gap length variety.

在气隙长度发生变化时，为了保证漏磁大小不变，讨论了气隙与非导磁衬套厚度、磁钢厚度的关系。

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