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:
May. 26, 2026
Filed:
Nov. 10, 2023
Magnetic flux reducing circuits for mitigating main bearing current in electric motors and gearboxes
GM Global Technology Operations Llc, Detroit, MI (US);
Yilun Luo, Ann Arbor, MI (US);
Jack M. Gayney, Grosse Ile, MI (US);
John A. Diemer, Royal Oak, MI (US);
Patrick S. Portell, Clarkston, MI (US);
Sanjeev M. Naik, Troy, MI (US);
Azadeh Narimissa, Lake Orion, MI (US);
Mohammad F. Momen, Rochester Hills, MI (US);
GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);
Abstract
A motor system includes: a stator connected to a case of a motor; main bearings connected to the case; a main shaft rotating on the main bearings; a rotor mounted on the main shaft and rotating relative to the stator; and at least one of a magnetic flux reducing circuit element and a conductive rolling-element device disposed inward of the main bearings and closer to the stator and the rotor than the main bearings and reducing flow of bearing current through the main bearings.