US 12,224,634 B2
Stator of rotary electric machine
Takahiro Toi, Yokohama Kanagawa (JP); Hiroaki Makino, Fuchu Tokyo (JP); Minoru Awazu, Yokohama Kanagawa (JP); Makoto Matsushita, Fuchu Tokyo (JP); Kazuya Yasui, Houston, TX (US); and Masaru Kano, Novi, MI (US)
Assigned to Kabushiki Kaisha Toshiba, Tokyo (JP); and Toshiba Infrastructure Systems & Solutions Corporation, Kawasaki Kanagawa (JP)
Filed by Kabushiki Kaisha Toshba, Tokyo (JP); and Toshiba Infrastructure Systems & Solutions Corporation, Kawasaki (JP)
Filed on Dec. 9, 2022, as Appl. No. 18/063,928.
Application 18/063,928 is a continuation of application No. PCT/JP2020/022741, filed on Jun. 9, 2020.
Prior Publication US 2023/0105198 A1, Apr. 6, 2023
Int. Cl. H02K 1/16 (2006.01); H02K 3/12 (2006.01); H02K 3/28 (2006.01); H02K 3/48 (2006.01)
CPC H02K 3/12 (2013.01) [H02K 1/16 (2013.01); H02K 3/28 (2013.01); H02K 3/48 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A stator of rotary electric machine, comprising:
a stator core including an annular yoke with a central axis line and a plurality of teeth extending from an inner periphery of the yoke, in which a slot is formed between adjacent teeth; and
multi-phase segment coils each including a plurality of coil segments each comprising a first linear part and a second linear part arranged in different slots and a bridge part positioned outside the stator core to connect the first linear part and the second linear part together, the coil segment formed of a rectangular conductor, wherein,
given that a direction of the central axis line is an axial direction, a direction orthogonal to the central axis line is a radial direction, and a direction about the central axis line is a circumferential direction,
a plurality of first linear parts or second linear parts are aligned in the radial direction in the slot,
at least an innermost coil segment in the slot is structured with a plurality of divided segments adhered together, each divided segment including a first linear part and a second linear part, and a bridge part positioned outside the stator core to connect the first linear part and the second linear part together, and formed of a rectangular conductor cross-sectional area of which is smaller than the rectangular conductor,
the bridge parts of the divided segments are arranged to cross each other in the radial direction,
the first linear parts of the divided segments are, in the slot, aligned in a first direction of the radial direction and the second linear parts are, in the slot, aligned in an opposite direction of the first direction,
the innermost coil segment is structured with a first coil segment including a first divided segment and a second divided segment, and a second coil segment including a third divided segment and a fourth divided segment and arranged to sandwich the first coil segment from both sides in the circumferential direction,
a bridge part of the first divided segment includes a first section extending from an extending end of the first linear part in the circumferential direction, a first crank part bending by a first length from the first section to an outer peripheral side in the radial direction, and a second section extending from the first crank part to an extending end of the second linear part in the circumferential direction and positioned to be shifted from the first section by the first length outward in the radial direction,
a bridge part of the second divided segment includes a first section extending from the extending end of the first linear part in the circumferential direction, a second crank part bending by a second length which is shorter than the first length from the first section to the outer peripheral side in the radial direction, and a second section extending from the second crank part to the extending end of the second linear part in the circumferential direction and positioned to be shifted from the first section by the second length outward in the radial direction, and
the first crank part and the second crank part are arranged to overlap with each other in the axial direction, and the second crank part extends to cross the first crank part.