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:
Apr. 28, 2015
Filed:
Jun. 28, 2011
David J. Reed, Fairport, NY (US);
Kenneth L. Kaye, Fairport, NY (US);
Derek R. Lebzelter, Fairport, NY (US);
Kevin Sampson, Rochester, NY (US);
David J. Reed, Fairport, NY (US);
Kenneth L. Kaye, Fairport, NY (US);
Derek R. Lebzelter, Fairport, NY (US);
Kevin Sampson, Rochester, NY (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method for providing calibration and synchronization pulses in a pulse width modulation (PWM) signal including cell voltage measurement pulses, where the calibration pulses are four calibration pulses having a pattern of a narrow width high voltage pulse followed by a wide width low voltage pulse followed by a narrow width high voltage pulse followed by a wide width low voltage pulse that has a very low probability of occurring in a practical fuel cell system. The method modulates a combined sequence of the voltage measurement signals and the calibration pulses using an inverted saw tooth wave to provide the PWM signal, where a width of the pulses representing the voltage signals are proportional to a width of the pulses representing the calibration pulses.