A stator assembly comprising: a first stator segment; a second stator segment; the first stator segment and the second stator segment being arranged along a circumferential direction of the stator assembly, wherein the first stator segment and the second stator segment are located adjacent to each other and are separated by a gap; at least one first coil set of a first multi-phase coil system, and at least one second coil set of a second multi-phase coil system, wherein each coil set (s1, s2) comprises at least one coil (s1, s2, s3) for each phase (u, v, w) of the respective multi-phase coil system (S1, S2); wherein each stator segment (210, 220) comprises a first busbar arrangement having first busbar elements, and a second busbar arrangement having second busbar elements, each busbar element (b1, b2) being assigned to one phase (u, v, w), a segment-to-segment connector connecting each busbar element (b1, b2) of one busbar arrangement (B1, B2) of the first stator segment to one busbar element (b1, b2) assigned to the same phase (u, v, w) of one busbar arrangement (B1, B2) of the adjacent second stator segment, thereby electrically bridging the gap; wherein the segment-to-segment connector is a flexible electrical connector, which is configured to changeably connect one of the busbar elements (b1, b2) of one busbar arrangement (B1, B2) of the first stator segment to one of the busbar elements (b1, b2) assigned to the same phase (u, v, w) of the first busbar arrangement or of the second busbar arrangement of the second stator segment; wherein, in each segment (210, 220), each coil of the coil sets (s1, s2) is connected to one busbar element (b1, b2) assigned to the same phase (u, v, w) of the first busbar arrangement or the second busbar arrangement; wherein, in a first multi-phase coil system distribution, each stator segment (210, 220) carries both, the first and the second multi-phase coil systems (S1, S2), wherein, with respect to the gap between the first stator segment and the second stator segment, the arrangement of coil sets (s1, s2) carried by the first stator segment is a mirror image of the arrangement of coil sets (s2, s1) carried by the adjacent second stator segment; or wherein, in a second multi-phase coil system distribution, each single stator segment carries either only coil sets (s1, s2) of the first multi-phase coil system or of the second multi-phase coil system. a first stator segment; a second stator segment; the first stator segment and the second stator segment being arranged along a circumferential direction of the stator assembly, wherein the first stator segment and the second stator segment are located adjacent to each other and are separated by a gap; at least one first coil set of a first multi-phase coil system, and at least one second coil set of a second multi-phase coil system, wherein each coil set (s1, s2) comprises at least one coil (s1, s2, s3) for each phase (u, v, w) of the respective multi-phase coil system (S1, S2); wherein each stator segment (210, 220) comprises a first busbar arrangement having first busbar elements, and a second busbar arrangement having second busbar elements, each busbar element (b1, b2) being assigned to one phase (u, v, w), a first busbar arrangement having first busbar elements, and a second busbar arrangement having second busbar elements, each busbar element (b1, b2) being assigned to one phase (u, v, w), a segment-to-segment connector connecting each busbar element (b1, b2) of one busbar arrangement (B1, B2) of the first stator segment to one busbar element (b1, b2) assigned to the same phase (u, v, w) of one busbar arrangement (B1, B2) of the adjacent second stator segment, thereby electrically bridging the gap; wherein the segment-to-segment connector is a flexible electrical connector, which is configured to changeably connect one of the busbar elements (b1, b2) of one busbar arrangement (B1, B2) of the first stator segment to one of the busbar elements (b1, b2) assigned to the same phase (u, v, w) of the first busbar arrangement or of the second busbar arrangement of the second stator segment; wherein, in each segment (210, 220), each coil of the coil sets (s1, s2) is connected to one busbar element (b1, b2) assigned to the same phase (u, v, w) of the first busbar arrangement or the second busbar arrangement; wherein, in a first multi-phase coil system distribution, each stator segment (210, 220) carries both, the first and the second multi-phase coil systems (S1, S2), wherein, with respect to the gap between the first stator segment and the second stator segment, the arrangement of coil sets (s1, s2) carried by the first stator segment is a mirror image of the arrangement of coil sets (s2, s1) carried by the adjacent second stator segment; or wherein, in a second multi-phase coil system distribution, each single stator segment carries either only coil sets (s1, s2) of the first multi-phase coil system or of the second multi-phase coil system.