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. 15, 2014
Filed:
Nov. 17, 2010
Dirk Hertz, Fichtenhof, DE;
Marco Schönenberg, Kuemmersbruck, DE;
Johann Seitz, Amberg, DE;
Stefan Zitzler, Schwandorf, DE;
Dirk Hertz, Fichtenhof, DE;
Marco Schönenberg, Kuemmersbruck, DE;
Johann Seitz, Amberg, DE;
Stefan Zitzler, Schwandorf, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A method is disclosed for determining a phase failure in an electrical device for driving or monitoring a three-phase AC motor, wherein the electrical device comprises a first, a second and a third line. In order to detect a phase failure in a line in the three-phase electrical device, in particular in a soft starter, the phase failure in the third line is determined by analysing the first and second lines, wherein the analysis includes: determining a value which characterizes a phase shift between a current in the first and second lines, and outputting a signal if the value which has been determined is in a range of values which characterizes a phase failure in the third line.