US 12,451,764 B2
Motor having cooling flow path
Jung Woo Lee, Seoul (KR); Young Jin Shin, Changwon-Si (KR); Ju Ho Lee, Gwangmyeong-Si (KR); Young Chul Kim, Gwangmyeong-Si (KR); and Jong Hoon Lee, Seoul (KR)
Assigned to Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed by Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed on Feb. 1, 2023, as Appl. No. 18/104,663.
Claims priority of application No. 10-2022-0114653 (KR), filed on Sep. 13, 2022.
Prior Publication US 2024/0088751 A1, Mar. 14, 2024
Int. Cl. H02K 9/14 (2006.01); H02K 1/27 (2022.01); H02K 5/20 (2006.01)
CPC H02K 9/14 (2013.01) [H02K 1/27 (2013.01); H02K 5/203 (2021.01)] 17 Claims
OG exemplary drawing
 
1. A motor, comprising:
a rotor and a stator,
wherein the rotor includes:
a rotor core including a plurality of core portions disposed on a rotation shaft along an axial direction of the rotor, wherein the rotor core includes a core flow path through which a cooling fluid passes through each core portion; and
a cooling plate which is inserted between two neighboring core portions among the plurality of core portions so that first and second surfaces thereof are joined to the two neighboring core portions,
wherein a distribution flow path that distributes the cooling fluid supplied from a cooling flow path of the rotation shaft into the core flow path of the two neighboring core portions are provided between at least one of the two neighboring core portions and the cooling plate,
wherein a flow path groove is formed on a joint surface of the cooling plate to which the core portion are joined,
wherein a joint surface of the core portions joined to the joint surface of the cooling plate and the flow path groove of the cooling plate form the distribution flow path,
wherein the distribution flow path includes:
a first distribution flow path that distributes a part of the cooling fluid supplied from the cooling flow path of the rotation shaft into the core flow path of the two neighboring core portions; and
a second distribution flow path that supplies a remainder of the cooling fluid supplied from the cooling flow path of the rotation shaft to a gap between the rotor and the stator,
wherein the first distribution flow path includes a flow path groove formed on the first surface of the cooling plate, and a joint surface of a first core portion joined to the first surface of the cooling plate among the two neighboring core portions, and
wherein the second distribution flow path includes a flow path groove formed on the second surface of the cooling plate, and a joint surface of a second core portion joined to the second surface of the cooling plate among the two neighboring core portions.