US 12,348,096 B2
Coil having segment conductors welded with a welded metal portion
Masakazu Kikawada, Yokohama (JP); and Tetsuo Sakai, Taito (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 Feb. 17, 2022, as Appl. No. 17/651,449.
Application 17/651,449 is a continuation of application No. PCT/JP2019/037791, filed on Sep. 26, 2019.
Prior Publication US 2022/0173629 A1, Jun. 2, 2022
Int. Cl. H02K 3/12 (2006.01); H02K 1/16 (2006.01); H02K 3/32 (2006.01)
CPC H02K 3/12 (2013.01) [H02K 1/16 (2013.01); H02K 3/32 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A coil, comprising:
a first segment conductor;
a second segment conductor; and
a welded metal portion at which the first and second segment conductors are welded,
the first segment conductor and the second segment conductor each including
a fixed portion held in a stator core, the fixed portion extending in a first direction,
an inclined portion protruding from the stator core and extending in a second direction inclined with respect to the first direction, the inclined portion including side surfaces covered with a coating film, the coating film being insulative, and
a weld portion located at a tip of the inclined portion, the weld portion not being covered with the coating film, the weld portion including
a first surface located within an extension plane in the second direction of one surface of the side surfaces,
a second surface contacting the first surface, and
a third surface contacting the second surface,
the first surface of the first segment conductor contacting the first surface of the second segment conductor,
the second surface of the first segment conductor and the second surface of the second segment conductor forming a continuous surface,
the third surface of the first segment conductor being separated from the third surface of the second segment conductor, and
the welded metal portion contacting the first, second, and third surfaces of the first segment conductor and contacting the first and second surfaces of the second segment conductor, wherein
when viewed along the first direction, a surface area of the second surface of the first segment conductor is less than a surface area of a region surrounded with an edge of the second surface of the first segment conductor at the inclined portion side, an edge of the second surface of the second segment conductor at the inclined portion side, and extension planes of the side surfaces of the inclined portion of the first segment conductor.