Patent ID: 11936261
Assignee: KONGSBERG MARITIME AS
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An electric machine, comprising:
a stator formed by a stator armature (100) provided with a plurality of slots (110), each slot having a height and an open end and extending in transversal direction of the stator armature (100),
coils (10, 10a-10n) positioned in said slots (110), each of the coils comprising a first coil side (11) and a second coil side (12),
several conductors (20A-20D, 20E-20H) positioned in-line one after another along the height of the slot (110), each conductor defining an axis,
end-winding areas (30) connecting the first coil side (11) and second coil side (12) outside each slots (110), wherein
the first coil side (11) and second coil side (12) of respective coils (10, 10a-10n) are arranged in separate non-adjacent slots (110),
the first coil side (11) of the respective coil (10, 10a-10n) is positioned in one of the slots (110) closer to a bottom (111) of the slot (110) and the second coil side (12) of the respective coil (10, 10a-10n) is positioned in the non-adjacent slot (110) closer to an opening (112) of the slot (110),
the conductors (20A-D, 20A-H) of respective coils (10, 10a-n) are litz wire conductors,
some or all of the conductors (20A-20D, 20E-20H) are transposed at an end-winding area (30) of the respective coil (10, 10a-10n) changing their vertical positions in the coil sides (11, 12),
the end-winding portions of the conductors (20A-20D, 20E-20H) are not twisted or turned around the axis of the respective conductor (20A-20D, 20E-20H), and the end-winding portions of a conductor (20D, 20H) in the end-winding area (30) is positioned axially closest to an active length section of the coils (10, 10a-10n), and
the end-winding portions of subsequent conductors (20C-20A, 20G-20E) of the respective coils (10, 10a-10n) are positioned next to the end-winding portions of a preceding conductor (20D-20A, 20H-20E), while axially outside and further from the active length section of the coils (10, 10a-10n) than the preceding conductor (20D-20A, 20H-20E).