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. 15, 2018
Filed:
Mar. 07, 2017
GM Global Technology Operations Llc, Detroit, MI (US);
Chandra S. Namuduri, Troy, MI (US);
Rajeev Vyas, Rochester Hills, MI (US);
Suresh Gopalakrishnan, Troy, MI (US);
Mark J. Rychlinski, Farmington Hills, MI (US);
Markus Demmerle, Nieder-Olm, DE;
Varsha K. Sadekar, Detroit, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
An electrical system includes a direct current (DC) voltage bus, a power supply providing a supply voltage to the DC voltage bus, an electric machine connected to the power supply, a reverse current protection (RCP) circuit positioned between the power supply and the electric machine, the RCP circuit including an energy dissipating element, and a controller. As part of an associated method, the controller detects a reverse current condition in which a current flows from the electric machine toward the power supply when an induced voltage of the electric machine exceeds a voltage level of the voltage bus. The controller transmits a control signal to the RCP circuit to direct the electrical current through the energy dissipating element for a duration of the reverse current condition or for a predetermined duration equal to or greater than that of the reverse current condition.