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. 03, 2026
Filed:
Aug. 24, 2023
Audi Ag, Ingolstadt, DE;
Daniel Ruppert, Lenting, DE;
AUDI AG, Ingolstadt, DE;
Abstract
An exciter circuit for an externally excited synchronous machine, comprising two voltage supply terminals for a voltage supply, two exciter current terminals configured to be connected to an exciter winding of the externally excited synchronous machine, and a bridge circuit coupled to the voltage supply terminals, a controller, a protective arrangement at a side of the exciter circuit with the exciter current terminals, wherein the protective arrangement includes a semiconductor switch switched in series with the exciter winding and a freewheeling path running in parallel with the exciter winding and having a connection point between one of the exciter current terminals and the semiconductor switch, wherein the freewheeling path has a diode which, in operation, is blocking in an exciter current flow direction, and a conversion resistor, wherein the controller, in operation, opens the semiconductor switch when a de-excitation signal is present.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile