| CPC H02K 3/28 (2013.01) [H02K 5/207 (2021.01); H02K 7/116 (2013.01); H02K 2205/09 (2013.01)] | 12 Claims |
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1. A stator for an electric machine, comprising:
a stator core which extends along a longitudinal axis and has a first end side and a second end side that lies opposite the first end side; and
a stator winding, wherein:
a multiplicity of grooves that are disposed in a circumferential direction are configured in the stator core,
the stator winding occupies a plurality of winding zones in the multiplicity of grooves,
the stator winding has a number of N strands and a number of 2·P poles, and the number of grooves is 2·P·N·q, where P, N and q are natural numbers, and q≥2,
each winding zone extends across at least q+1 of the grooves and is radially subdivided into first to Lth layers which are designated according to their sequence in a radial direction,
the layers configure first to (L/2)th double layers, wherein an ith double layer comprises a (2i−1)th and a (2i)th layer for all 1≤i≤(L/2), where L≥6 and is even, where L and i are natural numbers,
a number of the double layers being less than a remainder of double layers is displaced by at least one groove counter to a pre-defined circumferential direction in relation to the remainder of double layers,
each winding zone in the circumferential direction is subdivided into first to qth sub-winding zones which comprise in each case all layers and are designated according to their sequence in the circumferential direction, and
the stator winding for a respective strand has a phase winding comprising at least one sub-winding which configures a current path and comprises internal portions that are disposed within the multiplicity of grooves, and connection portions that are disposed on the first end side and the second end side of the stator core and connect in each case in an electrically conductive manner two internal portions which are directly successive in terms of the current path,
wherein the at least one sub-winding comprises a plurality of conductor sequences of internal portions which are successive in terms of the current path,
each conductor sequence is disposed in one of the double layers and configures a full encirclement of the stator core,
first to L/2th of the plurality of conductor sequences run in each case along the circumferential direction along the pre-defined circumferential direction, and
[(L/2)+1]th to Lth of the plurality of conductor sequences run in each case along a further circumferential direction that is counter to the circumferential direction.
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