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. 11, 2005
Filed:
Apr. 10, 2003
Thomas A. Baudendistel, Farmersville, OH (US);
Donald T. Morelli, White Lake, MI (US);
Bruce Heaston, West Milton, OH (US);
Curtis Cyran, Dayton, OH (US);
Jeff A. Foust, Eaton, OH (US);
Thomas A. Baudendistel, Farmersville, OH (US);
Donald T. Morelli, White Lake, MI (US);
Bruce Heaston, West Milton, OH (US);
Curtis Cyran, Dayton, OH (US);
Jeff A. Foust, Eaton, OH (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
A resistor (having a resistance of R) is connected in series with an inductor whose inductance and/or resistance is desired to be determined. An alternating voltage (such as a sinusoidal voltage) is applied across the series-connected resistor and inductor, wherein the alternating voltage has a frequency ω, a unique maximum or minimum value V, an average value and a unique crossover of the average value. The voltage Vis measured across the resistor when the alternating voltage is at its maximum or minimum value. The voltage Vis measured across the resistor when the alternating voltage is at its average value. The resistance Rof the inductor is calculated from an equation in which Ris a function of V, V, Rand V. The inductance L of the inductor is calculated from an equation in which L is a function of V, R, R, Vand ω.