US 11,955,841 B2
Stator and motor assembly including same
Sung Woo Chang, Hwaseong-si (KR); and Seung Yeol Lee, Daegu (KR)
Assigned to DAEGU GYEONGBUK INSTITUTE OF SCIENCE AND TECHNOLOGY, Daegu (KR)
Appl. No. 17/275,782
Filed by DAEGU GYEONGBUK INSTITUTE OF SCIENCE AND TECHNOLOGY, Daegu (KR)
PCT Filed Sep. 18, 2019, PCT No. PCT/KR2019/012073
§ 371(c)(1), (2) Date Mar. 12, 2021,
PCT Pub. No. WO2020/060190, PCT Pub. Date Mar. 26, 2020.
Claims priority of application No. 10-2018-0111603 (KR), filed on Sep. 18, 2018.
Prior Publication US 2022/0052566 A1, Feb. 17, 2022
Int. Cl. H02K 1/14 (2006.01); H02K 1/278 (2022.01); H02K 21/16 (2006.01)
CPC H02K 1/146 (2013.01) [H02K 1/278 (2013.01); H02K 21/16 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A stator comprising:
a stator core disposed outside a rotor having a rotation axis, wherein the stator core has an inner surface surrounding the rotor around the rotation axis;
a plurality of coil-wound teeth extending from the inner surface of the stator core towards the rotation axis, wherein a coil is wound around each of the plurality of coil-wound teeth; and
openings formed by sidewalls of the plurality of coil-wound teeth and the inner surface of the stator core and having a cross-sectional area perpendicular to the rotation axis,
wherein the inner surface of the stator core is inclined with respect to the rotation axis, thus the cross-sectional area of the openings changes along a direction of the rotation axis, a thickness of the stator core in a radial direction linearly increases along the direction of the rotation axis, and a distance from the rotation axis to the inner surface of the stator core in the radial direction linearly decreases along the direction of the rotation axis.