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:
Dec. 02, 1997
Filed:
Apr. 10, 1996
Eric Bettega, Meylan, FR;
Miaoxin Wang, Grenoble, FR;
Schneider Electric SA, , FR;
Electricite de France, , FR;
Abstract
A filtering device, connected between an electrical power supply source and a load, comprises an active filter connected to the source and to the load, and a passive filter connected to the load. A voltage, generated between two terminals of the active filter, is monitored by first and second circuits. The first circuit receives a signal representative of a current, and monitors the voltage according to the signal representative of the current on input of the filtering device and to a first coefficient. The second circuit receives a signal representative of a voltage, and monitors the voltage according to the voltage signal and to a second coefficient. The first and second coefficients have values variable according to the frequency.