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:
Jan. 21, 2014
Filed:
Mar. 05, 2010
S. M. Nayeem Hasan, Novi, MI (US);
David P. Tasky, Farmington Hills, MI (US);
Mohammad N. Anwar, Van Buren Township, MI (US);
Wei D. Wang, Troy, MI (US);
S. M. Nayeem Hasan, Novi, MI (US);
David P. Tasky, Farmington Hills, MI (US);
Mohammad N. Anwar, Van Buren Township, MI (US);
Wei D. Wang, Troy, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method for monitoring electric isolation of a high voltage DC bus to detect ground isolation faults includes monitoring voltage differentials between a positive DC electric power bus and a negative DC electric power bus and a chassis ground. Electrical isolation between each of the positive and negative DC electric power buses and the chassis ground is monitored using a ratio of the voltage differentials.