US 12,476,500 B2
Motor, powertrain, and device
Hongbing Liu, Shanghai (CN); Haisong Xu, Shanghai (CN); Bayaer Eerhemu, Shanghai (CN); Shaobo Yang, Dongguan (CN); and Jun Chen, Dongguan (CN)
Assigned to Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed on May 22, 2023, as Appl. No. 18/321,102.
Application 18/321,102 is a continuation of application No. PCT/CN2021/098023, filed on Jun. 2, 2021.
Claims priority of application No. 202011340779.3 (CN), filed on Nov. 25, 2020.
Prior Publication US 2023/0318370 A1, Oct. 5, 2023
Int. Cl. H02K 1/20 (2006.01)
CPC H02K 1/20 (2013.01) 18 Claims
OG exemplary drawing
 
1. A motor, comprising a housing, wherein at least a stator is disposed in the housing, the stator comprises a stator core and a coil winding, an inner surface of the stator core is provided with a plurality of coil slots disposed at intervals, and the coil winding is partially located inside the coil slots;
a plurality of first oil channels is formed between an inner surface of the housing and an outer surface of the stator core, wherein the plurality of first oil channels is circumferentially disposed at intervals along a periphery of the stator core, and the first oil channels are all connected to an oil filling port provided on the housing;
second oil channels are formed at slot bottoms of at least some of the coil slots, the slot bottoms is the part of the coil slots that is farthest from the center axis of the stator core; and
one end of the plurality of first oil channels is connected to one end of some of the second oil channels, the other end of the some of the second oil channels is connected to nozzles at one end of the motor, the other end of the plurality of first oil channels is connected to one end of a remaining second oil channel, and the other end of the remaining second oil channel is connected to nozzles at the other end of the motor;
a first end cap and a second end cap are respectively located at two ends of the stator core, the first end cap is provided with a plurality of first nozzles disposed at intervals, and the second end cap is provided with a plurality of second nozzles disposed at intervals; or
a first end cap of the motor comprises at least a first annular end plate, a second end cap of the motor comprises at least a second annular end plate, a plurality of first nozzles is circumferentially disposed at intervals along the first annular end plate, a plurality of second nozzles is circumferentially disposed at intervals along the second annular end plate, orthographic projections of the plurality of second nozzles towards the first annular end plate and the plurality of first nozzles are circumferentially arranged alternately on the first annular end plate.