US 12,149,120 B2
Stator with split teeth with coupling portion to back yoke
Kwangyong Jang, Seoul (KR); Yongdae Kim, Seoul (KR); and Jin Hong, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Appl. No. 17/640,650
Filed by LG Electronics Inc., Seoul (KR)
PCT Filed Jul. 24, 2020, PCT No. PCT/KR2020/009759
§ 371(c)(1), (2) Date Mar. 4, 2022,
PCT Pub. No. WO2021/045383, PCT Pub. Date Mar. 11, 2021.
Claims priority of application No. 10-2019-0109495 (KR), filed on Sep. 4, 2019.
Prior Publication US 2022/0360122 A1, Nov. 10, 2022
Int. Cl. H02K 1/14 (2006.01); H02K 7/14 (2006.01); H02K 15/02 (2006.01)
CPC H02K 1/148 (2013.01) [H02K 7/14 (2013.01); H02K 15/022 (2013.01); H02K 2213/03 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A stator comprising:
a back yoke having a radial thickness in a radial direction of the stator; and
split teeth coupled to the back yoke,
wherein the back yoke defines grooves that receive the split teeth, respectively,
wherein each of the split teeth comprises:
a winding portion on which a coil is wound, and
a coupling portion that extends from the winding portion in the radial direction and is inserted into one of the grooves,
wherein the coupling portion comprises radial portions that extend from the winding portion in the radial direction of the back yoke,
wherein each of the radial portions comprises:
a support portion that extends from the winding portion along a first direction inclined with respect to the radial direction such that a width of the support portion decreases along the radial direction, and
a bonding portion that extends from the support portion along a second direction inclined with respect to the first direction such that a width of the bonding portion increases along the radial direction,
wherein the width of the bonding portion is greater than the width of the support portion to thereby reduce an area that blocks magnetic flux between the bonding portion and an outer circumferential surface of the back yoke, and
wherein a radial length of the coupling portion in the radial direction is greater than a half of the radial thickness of the back yoke.