US 12,231,019 B2
Rotary electrical machine
Tokio Morohoshi, Tokyo (JP); Yudai Fujioka, Tokyo (JP); Takashi Fukunaga, Tokyo (JP); and Takayoshi Fujii, Tokyo (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD., Sagamihara (JP)
Appl. No. 17/795,671
Filed by MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD., Sagamihara (JP)
PCT Filed Mar. 4, 2021, PCT No. PCT/JP2021/008432
§ 371(c)(1), (2) Date Jul. 27, 2022,
PCT Pub. No. WO2021/177404, PCT Pub. Date Sep. 10, 2021.
Claims priority of application No. 2020-036918 (JP), filed on Mar. 4, 2020.
Prior Publication US 2023/0077059 A1, Mar. 9, 2023
Int. Cl. H02K 5/24 (2006.01); H02K 5/20 (2006.01)
CPC H02K 5/24 (2013.01) [H02K 5/203 (2021.01)] 4 Claims
OG exemplary drawing
 
1. A rotary electrical machine comprising:
a rotor that is rotatable using a predetermined axial direction as a direction of an axis of rotation;
a stator that is disposed outside the rotor in a radial direction of the rotor; and
a housing which includes a flow passage portion, in which a refrigerant flows, is formed and in which the rotor and the stator are housed with one axial end open and the other end closed,
wherein the flow passage portion includes an inner peripheral wall that is in contact with an outer peripheral surface of the stator, an outer peripheral wall that is disposed outside the inner peripheral wall in the radial direction and that is provided to form the flow passage portion between the outer peripheral wall and the inner peripheral wall, a bottom portion that is provided at the other end of the housing in the axial direction so as to be disposed on the other axial side of the rotor and the stator, and connects the inner peripheral wall and the outer peripheral wall in the radial direction, and a partition wall portion that is provided at a part in a circumferential direction orthogonal to both the axial direction and the radial direction and that connects the inner peripheral wall to the outer peripheral wall in the radial direction,
the flow passage portion is such that a length in the axial direction is longer than a length in the axial direction of the stator over the entire circumferential direction,
a lid member is fixed to one end of the housing in the axial direction, so that the rotor and the stator are housed inside the housing, and the flow passage portion is sealed,
the stator includes a tubular yoke portion, and a plurality of teeth which are arranged side by side in the circumferential direction and which extend inward from the yoke portion in the radial direction,
the yoke portion includes first portions that are connected to the respective teeth, and second portions which are each disposed between two first portions adjacent to each other in the circumferential direction, and
the partition wall portion faces the second portion in the radial direction.