US 12,176,776 B2
Stator including coil segments with hook-shaped portions
Hideki Hisada, Kuwana Mie (JP)
Assigned to Kabushiki Kaisha Toshiba, Tokyo (JP); and Toshiba Infrastructure Systems & Solutions Corporation, Kawasaki (JP)
Filed by KABUSHIKI KAISHA TOSHIBA, Tokyo (JP); and TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORPORATION, Kawasaki (JP)
Filed on Sep. 5, 2022, as Appl. No. 17/929,725.
Application 17/929,725 is a continuation of application No. PCT/JP2020/009488, filed on Mar. 5, 2020.
Prior Publication US 2022/0416605 A1, Dec. 29, 2022
Int. Cl. H02K 3/28 (2006.01); H02K 3/48 (2006.01); H02K 3/50 (2006.01)
CPC H02K 3/28 (2013.01) [H02K 3/48 (2013.01); H02K 3/50 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A stator comprising:
a stator core that includes a yoke having an annular shape and a plurality of teeth each extending in a radial direction from an inner periphery of the yoke and positioned side by side at intervals in a circumferential direction of the yoke, wherein a gap between a pair of teeth adjacent in the circumferential direction forms a slot; and
a stator coil configured by joining a plurality of coil segments mounted in the slots,
wherein the coil segments each include a pair of linear portions arranged in different slots, a bridging portion arranged outside the stator core and connecting one ends of the pair of linear portions, an extending portion extending from the other end of the linear portion to the outside of the stator core, a joining end portion having a distal end surface formed at an extending end of the extending portion, and a hook-shaped portion formed at the joining end portion and having the distal end surface and a first engagement surface intersecting the distal end surface, and
the extending portions of the plurality of coil segments include:
a plurality of first extending portions each including a bent portion bent in a first direction in a circumferential direction of the stator core, an inclined portion extending from the bent portion while being inclined with respect to an axial direction of the stator core, and the joining end portion and the hook-shaped portion provided at an extending end of the inclined portion, the first engagement surface facing a second direction opposite to the first direction in the circumferential direction and inclined in the first direction from one side toward a center side of the distal end surface with respect to the radial direction; and
a plurality of second extending portions each including a bent portion bent in the second direction opposite to the first direction in the circumferential direction of the stator core, an inclined portion extending from the bent portion while being inclined with respect to the axial direction of the stator core, and the joining end portion and the hook-shaped portion provided at an extending end of the inclined portion, the first engagement surface of the hook-shaped portion facing the first direction opposite to the second direction in the circumferential direction and inclined in the second direction from one side to a center side of the distal end surface with respect to the radial direction, and
the joining end portion of the first extending portion and the joining end portion of the second extending portion are arranged side by side in the radial direction such that the distal end surfaces are located at substantially the same height, the hook-shaped portion of the first extending portion is meshed with the hook-shaped portion of the second extending portion, and the first engagement surface of one of the joining end portions faces and abuts on the first engagement surface of the other of the joining end portions.