US 11,955,861 B2
Brushless motor, stator and method of manufacturing the same
Ying Feng, Shenzhen (CN); Yick Kun Kenny Tsui, Hong Kong (CN); Ping Wo Poon, Hong Kong (CN); Kam Ting Ko, Hong Kong (CN); Siu Kin Tam, Hong Kong (CN); and Da Wei Zhou, Hong Kong (CN)
Assigned to JOHNSON ELECTRIC INTERNATIONAL AG, Murten (CH)
Filed by Johnson Electric International AG, Murten (CH)
Filed on Jul. 27, 2020, as Appl. No. 16/947,278.
Claims priority of application No. 201910684966.4 (CN), filed on Jul. 26, 2019.
Prior Publication US 2021/0028666 A1, Jan. 28, 2021
Int. Cl. H02K 3/52 (2006.01); H02K 1/14 (2006.01); H02K 11/40 (2016.01); H02K 15/00 (2006.01); H02K 15/02 (2006.01)
CPC H02K 3/522 (2013.01) [H02K 1/146 (2013.01); H02K 11/40 (2016.01); H02K 15/0062 (2013.01); H02K 15/022 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A stator of a brushless motor, comprising a stator core, an insulation frame arranged on the stator core, and a plurality of windings wound around the insulating frame,
wherein, the stator core comprises a ring-shaped yoke part, and a pole part mounted to a radial inner side of the yoke part;
the pole part comprises a plurality of teeth spaced-apart from each other along a circumferential direction, and a ring-shaped portion connected to radial inner sides of the teeth;
radial outer sides of the teeth abut against the radial inner side of the yoke part;
the insulating frame is arranged on the pole part;
a plurality of power terminals are fixed to one axial end of the insulating frame and respectively electrically connected to the windings,
the ring-shaped portion comprises a plurality of pole shoes respectively corresponding to the teeth, and a plurality of bridges configured to connect adjacent pole shoes;
the ring-shaped portion further comprises a plurality of holes, each of which is formed between two axially adjacent bridges, and
the insulating frame comprises an inner ring corresponding to the ring-shaped portion and a plurality of branches respectively corresponding to the teeth, the windings are wound on the branches, the insulating frame further comprises a plurality of protrusions formed at a radial inner side of the inner ring corresponding to the holes, and the protrusions are received in the corresponding holes.