The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 04, 2025
Filed:
Aug. 24, 2022
Applicant:
Meidensha Corporation, Tokyo, JP;
Inventor:
Kiyoshi Uemura, Numazu, JP;
Assignee:
MEIDENSHA CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 9/24 (2006.01); H02K 9/19 (2006.01); H02K 11/20 (2016.01); H02K 11/33 (2016.01);
U.S. Cl.
CPC ...
H02K 9/24 (2013.01); H02K 9/19 (2013.01); H02K 11/20 (2016.01); H02K 11/33 (2016.01);
Abstract
In a motor cooling system, a determination unitis configured to perform periodic sampling of a driving current Ip or a rotation speed Np of an oil pump, and detect a decrease in cooling oil of a motorwhen it is determined that a standard deviation of the driving current Ip or the rotation speed Np with respect to a plurality of sampling points is larger than a preset threshold value. The threshold value is set on the bases of a measurement value of the driving current Ip or the rotation speed Np of the oil pumpwhich is obtained by an operation test of the motorin a state in which the cooling oil has decreased.