US 12,249,892 B2
Cooling jacket for cooling permanent magnet synchronous electric motor
Mohammad Naeem Khan, Hai Phong (VN); The Quynh Nguyen, Hai Phong (VN); Van Hoan Nguyen, Hai Phong (VN); and Van Tho Nguyen, Hai Phong (VN)
Assigned to VINFAST TRADING AND PRODUCTION JOINT STOCK COMPANY, Hai Phong (VN)
Filed by VINFAST TRADING AND PRODUCTION JOINT STOCK COMPANY, Hai Phong (VN)
Filed on Dec. 13, 2022, as Appl. No. 18/080,246.
Claims priority of application No. 1-2022-01123 (VN), filed on Feb. 23, 2022.
Prior Publication US 2023/0268795 A1, Aug. 24, 2023
Int. Cl. H02K 5/20 (2006.01); H02K 1/20 (2006.01); H02K 5/173 (2006.01); H02K 9/19 (2006.01); H02K 9/193 (2006.01)
CPC H02K 5/203 (2021.01) [H02K 1/20 (2013.01); H02K 5/1732 (2013.01); H02K 9/193 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A cooling jacket for cooling a permanent magnet synchronous electric motor, wherein the permanent magnet synchronous electric motor comprises a stator outer housing substantially in a form of a hollow cylinder surrounding the cooling jacket which is also substantially in a form of a hollow cylinder; a stator core in a form of a hollow cylinder located inside the cooling jacket; and a rotor rotatably mounted inside the stator core, and the stator outer housing has an end portion configured to form a bearing housing of the motor, the cooling jacket comprising:
a bearing housing cooling portion; and
a stator cooling portion,
wherein the stator cooling portion comprises an outer wall located on an outer end side and an inner wall located on an inner end side thereof, a partition wall that extends in a spiral shape around a circumference of the stator cooling portion, and the partition wall is connected with the outer wall and the inner wall at one end and other end of the partition wall, respectively, wherein the partition wall, the outer wall, and the inner wall are in hermetically contact with an inner surface of the stator outer housing and together form a stator coolant guiding channel,
wherein a middle section of the stator coolant guiding channel is enlarged, at a middle of the enlarged middle section there is provided a flow splitter having a shape that corresponds to the enlarged middle section, the flow splitter has a same height as that of the partition wall, and a upper surface of the flow splitter is curved to form a seal with the inner surface of the stator outer housing, and
wherein at a middle of the stator coolant guiding channel, the stator coolant guiding channel includes a middle rib that extends in a spiral shape around the circumference of the stator cooling portion, the middle rib comprises a front rib portion and a rear rib portion, wherein the front rib portion extends substantially parallel with the partition wall from a coolant inlet to a position located between the partition wall and a side surface of the flow splitter, the rear rib portion extends substantially parallel with the partition wall from a position located between the partition wall and an opposite side surface of the flow splitter to a coolant outlet, and the middle rib has a lower height than the height of the partition wall.