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:
Mar. 01, 2016
Filed:
Jul. 16, 2013
GM Global Technology Operations Llc, Detroit, MI (US);
Konking (Michael) Wang, Canton, MI (US);
GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);
Abstract
A method for monitoring an electric power circuit configured to transfer a power signal to a torque module that is electrically isolated from a chassis ground includes injecting a common voltage component into a common mode voltage of electrical phases during operation and monitoring a negative-ground voltage and a positive-negative voltage of the electric power circuit. An AC line resistance is determined based upon the negative-ground voltage and the positive-negative voltage. Faults in electrical isolation between the electric power circuit and a chassis ground are detected based upon the AC line resistance.