US 12,218,571 B2
Motor cooling system and motor cooling monitoring method
Kiyoshi Uemura, Numazu (JP)
Assigned to MEIDENSHA CORPORATION, Tokyo (JP)
Appl. No. 18/714,013
Filed by MEIDENSHA CORPORATION, Tokyo (JP)
PCT Filed Aug. 24, 2022, PCT No. PCT/JP2022/031798
§ 371(c)(1), (2) Date May 28, 2024,
PCT Pub. No. WO2023/095401, PCT Pub. Date Jun. 1, 2023.
Claims priority of application No. 2021-192662 (JP), filed on Nov. 29, 2021.
Prior Publication US 2024/0421666 A1, Dec. 19, 2024
Int. Cl. H02K 9/24 (2006.01); H02K 9/19 (2006.01); H02K 11/20 (2016.01); H02K 11/33 (2016.01)
CPC H02K 9/24 (2013.01) [H02K 9/19 (2013.01); H02K 11/20 (2016.01); H02K 11/33 (2016.01)] 14 Claims
OG exemplary drawing
 
1. A motor cooling system comprising:
an oil pump for circulating cooling oil of a motor; and
a determination unit configured to detect a decrease in the cooling oil when a standard deviation of a driving current of the oil pump with respect to a plurality of sampling points of the driving current is larger than a preset threshold value.