US 12,249,867 B2
Rotary electrical device
Yoshinari Asano, Osaka (JP); Naohiro Kido, Osaka (JP); Tsukasa Asari, Osaka (JP); Akane Ueda, Osaka (JP); and Yuuya Horinouchi, Osaka (JP)
Assigned to DAIKIN INDUSTRIES, LTD., Osaka (JP)
Appl. No. 17/997,762
Filed by DAIKIN INDUSTRIES, LTD., Osaka (JP)
PCT Filed Apr. 30, 2021, PCT No. PCT/JP2021/017229
§ 371(c)(1), (2) Date Nov. 2, 2022,
PCT Pub. No. WO2021/230113, PCT Pub. Date Nov. 18, 2021.
Claims priority of application No. 2020-083123 (JP), filed on May 11, 2020.
Prior Publication US 2023/0163646 A1, May 25, 2023
Int. Cl. H02K 1/14 (2006.01)
CPC H02K 1/145 (2013.01) [H02K 2213/03 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A rotary electrical device comprising:
a rotor having a substantially hollow cylindrical shape or a substantially solid cylindrical shape and configured to be rotatable; and
a stator having a substantially annular shape and disposed in a radial direction of the rotor to surround a rotation axis of the rotor,
wherein the stator includes a winding that is wound in a substantially annular shape around the rotation axis, and a stator core that surrounds the winding and is constituted by a magnetic powder core,
wherein the stator core includes a plurality of cores facing each other with the winding interposed therebetween in an axial direction of the stator,
wherein one core of the plurality of cores includes a yoke that is in contact with one other core of the plurality of cores, and one or more claw magnetic poles that protrude from the yoke toward the rotor in the radial direction,
wherein the one or more claw magnetic poles of the one core of the plurality of cores are alternately arranged with claw magnetic poles of the one other core, with which or to which the yoke is in contact, in a circumferential direction of the stator,
wherein the yoke has at least one yoke surface that is substantially parallel to the axial direction, and
wherein the yoke surface of the yoke of the one core of the plurality of cores includes a surface that is in contact with a yoke surface of a yoke of the one other core in the circumferential direction.