US 12,261,492 B2
Rotor structure, electric motor and rotor manufacturing method
Yusheng Hu, Zhuhai (CN); Bin Chen, Zhuhai (CN); Yong Xiao, Zhuhai (CN); Jinfei Shi, Zhuhai (CN); Xia Li, Zhuhai (CN); and Zhidong Zhang, Zhuhai (CN)
Assigned to GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI, Guangdong (CN)
Appl. No. 18/017,061
Filed by GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI, Guangdong (CN)
PCT Filed Jul. 22, 2021, PCT No. PCT/CN2021/107838
§ 371(c)(1), (2) Date Jan. 19, 2023,
PCT Pub. No. WO2022/127110, PCT Pub. Date Jun. 23, 2022.
Claims priority of application No. 202011503752.1 (CN), filed on Dec. 17, 2020.
Prior Publication US 2023/0308001 A1, Sep. 28, 2023
Int. Cl. H02K 1/24 (2006.01); H02K 15/023 (2025.01); H02K 19/10 (2006.01); H02K 19/14 (2006.01)
CPC H02K 19/14 (2013.01) [H02K 1/246 (2013.01); H02K 15/023 (2025.01); H02K 19/103 (2013.01); H02K 2213/03 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A rotor structure, comprising:
a plurality of rotor sheets stacked in sequence along an axial direction of the rotor structure, each of the plurality of rotor sheets is provided with a shaft hole, a first slot, and first filling slots at both ends of the first slot, the first slot extending in a direction of a direct axis of the rotor structure and comprising slot sections at opposite sides of the shaft hole; and
rotating shaft passing through the shaft hole of the plurality of rotor sheets,
wherein the first slot, the first filling slots, and the rotating shaft form a first flux barrier layer; a minimum distance L1 between each slot section and the shaft hole is ranged as: σ≤L1≤5σ, wherein σ is a width of an air gap between an inner diameter of a stator and an outer diameter of a rotor in an electric motor comprising the rotor structure.