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:
Jul. 15, 2025
Filed:
Oct. 13, 2023
GM Global Technology Operations Llc, Detroit, MI (US);
Martin E. Rosalik, Jr., Oakland Township, MI (US);
Todd M. York, Highland, MI (US);
Tanvi Nagarale, Rochester Hills, MI (US);
Brent S. Gagas, Pleasant Ridge, MI (US);
Brian A. Welchko, Oakland Township, MI (US);
Wei Wang, Troy, MI (US);
GM GLOBAL TECHNOLOG OPERATIONS LLC, Detroit, MI (US);
Abstract
Vehicles and related systems and monitoring methods are provided for detecting a loss of isolation on one side of a power converter. One method involves monitoring a normalized voltage input to a power conversion module coupled to the electric motor, in response to the normalized voltage exceeding a diagnostic activation threshold, determining a first number of instances of a range between successive extremas of the normalized voltage exceeding a loss of isolation range threshold over a diagnostic window of time, and automatically initiating a remedial action when the first number is greater than a loss of isolation detection threshold.