US 12,231,001 B2
Stator and manufacturing method thereof
Kohei Watanabe, Okazaki (JP); Masashi Matsumoto, Nagoya (JP); and Hazuki Kawamura, Nisshin (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on May 31, 2022, as Appl. No. 17/804,689.
Claims priority of application No. 2021-093206 (JP), filed on Jun. 2, 2021.
Prior Publication US 2022/0393524 A1, Dec. 8, 2022
Int. Cl. H02K 3/28 (2006.01); H02K 1/16 (2006.01); H02K 3/12 (2006.01)
CPC H02K 1/165 (2013.01) [H02K 3/12 (2013.01); H02K 3/28 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A stator comprising:
a stator core comprising a cylindrical shape; and
a coil fixed to the stator core,
wherein
the stator core comprises a first end surface and a second end surface located on opposite sides of the stator core in an axial direction of the stator core,
a first slot, a second slot, a third slot, and a fourth slot are provided in an inner circumferential surface of the stator core,
each of the first slot, the second slot, the third slot, and the fourth slot extends along the axial direction from the first end surface to the second end surface,
the coil comprises a first segment conductor, a second segment conductor, and a third segment conductor,
each of the first segment conductor, the second segment conductor, and the third segment conductor comprises a U-shape including a first linear portion, a second linear portion, and a coupling portion coupling the first linear portion and the second linear portion,
the coupling portion of the first segment conductor is located at a position facing the first end surface,
the first linear portion of the first segment conductor is inserted in the first slot,
the second linear portion of the first segment conductor is inserted in the second slot,
the coupling portion of the second segment conductor is located at a position facing the second end surface,
the first linear portion of the second segment conductor is inserted in the second slot,
the second linear portion of the second segment conductor is inserted in the third slot,
the coupling portion of the third segment conductor is located at a position facing the first end surface,
the first linear portion of the third segment conductor is inserted in the third slot,
the second linear portion of the third segment conductor is inserted in the fourth slot,
a tip end of the second linear portion of the first segment conductor and a tip end of the first linear portion of the second segment conductor are electrically connected with each other in the second slot in a state overlapping each other in a circumferential direction of the stator, and
a tip end of the second linear portion of the second segment conductor and a tip end of the first linear portion of the third segment conductor are electrically connected with each other in the third slot in a state overlapping each other in the circumferential direction of the stator, and
wherein
in a cross section perpendicular to the axial direction, a contact interface between the tip end of the second linear portion of the first segment conductor and the tip end of the first linear portion of the second segment conductor is inclined with respect to a radial direction of the stator core,
a protrusion is provided on a side surface of the second slot,
a plurality of coil wirings including a coil wiring constituted of the first segment conductor and the second segment conductor is stacked along the radial direction in the second slot, and
the plurality of coil wirings is fixed in a compressed state between the protrusion of the second slot and a bottom surface of the second slot.