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:
Feb. 19, 2008
Filed:
Aug. 26, 2005
Steven R. Turner, Carmel, IN (US);
Mohammad Zakaria, Kokomo, IN (US);
Steven R. Turner, Carmel, IN (US);
Mohammad Zakaria, Kokomo, IN (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
A processor is responsive to a thermistor temperature (T) adjacent a FET and to a drain-to-source voltage (V) of the FET. The processor stores the characteristics of the PET and a thermal model of the system hardware and uses a first set of equations to determine the temperature (T) at the junction of the PET in a stable region of operation where T−Tis nearly constant. The processor is further responsive to a step change in successive measurements of Vindicative of a lag of Trelative to T. In this step-change region, the processor then resolves Tbased upon a second set of equations.