US 11,855,489 B2
Rotor assembly and consequent-pole motor
Bin Chen, Guangdong (CN); Quanfeng Li, Guangdong (CN); Yong Xiao, Guangdong (CN); and Jinfei Shi, Guangdong (CN)
Assigned to Gree Electric Appliances, Inc. of Zhuhai, Guangdong (CN)
Appl. No. 17/055,881
Filed by Gree Electric Appliances, Inc. of Zhuhai, Guangdong (CN)
PCT Filed Dec. 18, 2018, PCT No. PCT/CN2018/121701
§ 371(c)(1), (2) Date Nov. 16, 2020,
PCT Pub. No. WO2020/034514, PCT Pub. Date Feb. 20, 2020.
Claims priority of application No. 201810918419.3 (CN), filed on Aug. 13, 2018.
Prior Publication US 2021/0226492 A1, Jul. 22, 2021
Int. Cl. H02K 1/27 (2022.01); H02K 1/276 (2022.01)
CPC H02K 1/2766 (2013.01) [H02K 2213/03 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A rotor assembly, comprising:
an iron core provided with a plurality of mounting grooves; and
a plurality of permanent magnets accommodated respectively in the plurality of mounting grooves,
wherein the plurality of mounting grooves are distributed along a circumferential direction of the iron core, and divide the iron core into a plurality of permanent magnetic pole regions and a plurality of consequent-pole regions, each mounting groove of the mounting grooves has a first end adjacent to an outer edge of the iron core; one side of the first end is provided with a second air slot located in the consequent-pole regions; the second air slot is communicated with the mounting groove, and magnetic poles of the plurality of permanent magnets facing the outer edge of the iron core are the same;
a center of the iron core is provided with a rotation shaft hole; the iron core is further provided with a third air slot annularly arranged on an outer edge of the rotation shaft hole; the third air slot is a structure composed of a plurality of segments, each segment of the third air slot is interposed between two of the mounting grooves, and an end face of the third air slot is disposed to be spaced apart from the mounting grooves.