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. 18, 2000
Filed:
Mar. 03, 1999
Scott D Sudhoff, West Lafayette, IN (US);
Steven F Glover, Lafayette, IN (US);
P.C. Krause & Associates, Inc., West Lafayette, IN (US);
Abstract
Power electronic based power and propulsion systems are used in a wide variety of applications including locomotives, hybrid electric vehicles, aircraft, spacecraft, and ships. In general, the power electronic loads in such systems have tightly regulated outputs which causes them to behave as constant power loads exhibiting negative input impedances in a small signal sense. Such systems can be prone to negative impedance instability. The present invention mitigates negative impedance instability without the introduction of any passive or active devices into the system by providing nonlinear modulation of the power into the power electronic load.