US 12,345,266 B2
Electric water pump
Tae Gwan Heo, Gwacheon-si (KR); Gun Goo Lee, Suwon-si (KR); Shin Gyu Kim, Hwaseong-si (KR); and Byung Soo Kim, Pyeongtaek-si (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 Oct. 18, 2022, as Appl. No. 17/968,350.
Claims priority of application No. 10-2021-0174544 (KR), filed on Dec. 8, 2021.
Prior Publication US 2023/0179055 A1, Jun. 8, 2023
Int. Cl. F04D 13/06 (2006.01); H02K 3/44 (2006.01); H02K 3/52 (2006.01); H02K 21/24 (2006.01)
CPC F04D 13/0626 (2013.01) [F04D 13/0666 (2013.01); H02K 3/522 (2013.01); H02K 21/24 (2013.01); H02K 3/44 (2013.01); H02K 2203/12 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An electric water pump comprising:
a pump cover having an inlet for inflow of a fluid and an outlet for outflow of the fluid; and
an impeller disposed in an internal space of the pump cover and rotated by a motor to transfer the fluid, introduced through the inlet, to the outlet,
wherein the motor includes
a rotor coupled to the impeller to rotate with the impeller,
a stator disposed beneath the rotor and configured to rotate the rotor by generating a magnetic field using an externally applied current, and
a casing configured to receive and protect the stator and provided with a separator to isolate an electrical component of the stator from the fluid,
wherein the separator is formed integrally with an upper portion of the stator so as to surround the upper portion of the stator, without covering an upper surface of the stator,
wherein the stator includes
a plurality of stator cores, each having a core head accommodating magnetic flux and a core body formed integrally on a lower surface of the core head, and magnetized by the magnetic field; and
a plurality of bobbins, each disposed on an outer peripheral surface of the associated core body and having a coil wound therearound, the current being applied to the coil from outside,
wherein the plurality of bobbins is formed integrally with the separator such that the plurality of bobbins extends downward on a lower surface of the separator,
wherein the separator is formed integrally with each core head so as to surround each core head, without covering an upper surface of each core head,
wherein the separator has a plurality of insert holes arranged in an arrangement direction of the stator cores, and
wherein the upper surface of each core head comes into direct contact with the fluid respectively through each of the plurality of insert holes.