ELECTRIC MACHINE HAVING A LOW-MASS DESIGN IN MAGNETICALLY ACTIVE PARTS Russian patent published in 2016 - IPC H02K1/06 H02K1/14 

FIELD: electricity.

SUBSTANCE: invention relates to an electric machine. Electric machine comprises the first magnetic pole, which comprises an arrangement of layers that comprises magnetically active layers, having a total volume V_a, and the second magnetic pole. First magnetic pole and the second magnetic pole can be moved relative to each other. Gap has a length l_s in direction parallel to one of layers, from an end of the first magnetic pole bounding the gap to an end of the second magnetic pole bounding the gap. Arrangement comprises magnetically inactive layers having a total volume V_i, which have a lower average density than the magnetically active layers, and a sequence in the arrangement of the magnetically inactive layers and the magnetically active layers is specified substantially by a repetition of a period p, which has a defined order of magnetically active layers and magnetically inactive layers. Ratio (k) of total volume (V_a) of magnetically active layers and magnetically inactive layers k fulfills the condition 0.5≤k≤0.8. Magnetically active layers have thicknesses b_ai, which fulfill the condition b_ai≤l_s/4…l_s/20.

EFFECT: reduced weight of active parts without power reduction.

22 cl, 11 dwg