US 12,261,480 B2
Motor
Shung Hun Woo, Seoul (KR)
Assigned to LG INNOTEK CO., LTD., Seoul (KR)
Appl. No. 17/618,319
Filed by LG INNOTEK CO., LTD., Seoul (KR)
PCT Filed Jun. 10, 2020, PCT No. PCT/KR2020/007474
§ 371(c)(1), (2) Date Dec. 10, 2021,
PCT Pub. No. WO2020/251244, PCT Pub. Date Dec. 17, 2020.
Claims priority of application No. 10-2019-0068764 (KR), filed on Jun. 11, 2019; and application No. 10-2019-0102384 (KR), filed on Aug. 21, 2019.
Prior Publication US 2022/0368176 A1, Nov. 17, 2022
Int. Cl. H02K 1/14 (2006.01)
CPC H02K 1/146 (2013.01) [H02K 2201/03 (2013.01); H02K 2213/03 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A motor comprising:
a shaft;
a rotor coupled to the shaft; and
a stator disposed to correspond to the rotor,
wherein the stator includes a yoke and a tooth protruding from the yoke,
wherein the tooth includes grooves and a plurality of protrusions disposed on an inner surface of the tooth,
wherein the grooves are disposed radially concave on the inner surface of the tooth,
wherein the plurality of protrusions are radially convexly disposed on the inner surface of the tooth,
wherein the plurality of protrusions include a first surface and a plurality of third surfaces,
wherein the grooves include a plurality of second surfaces,
wherein the first surface is disposed between the plurality of third surfaces, and
wherein a length of a protrusion including the first surface is longer than a length of protrusions including the plurality of third surfaces in a length direction of the tooth.