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:
Aug. 01, 2006
Filed:
Jul. 14, 2003
Harald Kramer, Lohr, DE;
Dierk Gress, Hammelburg, DE;
Harald Kramer, Lohr, DE;
Dierk Gress, Hammelburg, DE;
Rexroth Indramat GmbH, Lohr am Main, DE;
Abstract
The electronic monitoring circuit for monitoring one of a group of series-connected capacitor units in an intermediate circuit in order to detect short-circuiting of one of the capacitor units includes a device for deriving a reference voltage () from an intermediate-circuit voltage (L(+), L(−)) applied across the series-connected capacitor units (), a device for generating a control signal consisting of a voltage difference between the reference voltage () and a junction voltage at a junction () between two capacitor unit () and a device for generating an error signal when said voltage difference falls below or exceeds an activation threshold voltage thus indicating that one of the capacitor units () has been short-circuited. The activation threshold voltage corresponds to a breakdown voltage of a zener diode provided in the monitoring circuit.