The iron core is used to maximize the coupling between the coils (formed by conductors) placed on the stator and rotor, to increase the flux density in the machine and to decrease the size of machine.
铁芯用于使放置在转子和定子中的线圈（由导体构成）之间的耦合最大，以增加电机的磁通密度以及减小电机尺寸。
The structure has the advantages that: a plurality of air gaps are left at the two ends of the stator iron core and the end part of the stator winding, thus increasing the area of the wind path.
优点在 于，在定子铁芯两端，定子绕组的端部，留有很多的气隙，增加了风路 的面积。
The structure has the advantages that: a plurality of air gaps are left at the two ends of the stator iron core and the end part of the stator winding, thus increasing the area of the wind path.
优点在 于，在定子铁芯两端，定子绕组的端部，留有很多的气隙，增加了风路 的面积。
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