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:
Sep. 19, 2023
Filed:
Nov. 16, 2020
Marco Bohlländer, Hirschaid, DE;
Marco Bohlländer, Hirschaid, DE;
Rolls-Royce Deutschland Ltd & Co KG, Blankenfelde-Mahlow, DE;
Abstract
A method for identifying an inverter short circuit between two phases includes measuring AC current values of three phases. Values of a temporal current change are also identified based on the measured AC current values. A short circuit between two phases is then assumed if, in one phase at DC+ and one phase at DC−, the current rises more quickly or falls more quickly than a predetermined threshold value. In order to check this assumption, it is identified whether the value of the identified rise in a first phase possibly affected by the short circuit corresponds to the value of the identified fall in a second phase possibly affected by the short circuit. In the event that the assumption has been positively confirmed, it is also checked whether a current sum of the phases is still unchanged. A short circuit is established when the two checks have proven positive.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile