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. 15, 2015
Filed:
Dec. 07, 2011
Jens-werner Falkenstein, Aalen, DE;
Jens-Werner Falkenstein, Aalen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A method for detecting the malfunction in a three-phase synchronous electric machine by modulating variables. Two variables, which influence the torque of the electric machine are modulated. The first variable represents the q component of the stator current. The second variable represents the rotor flux. The variables are modulated by superimposing on their base signals, a test signal. Under faultless operation of the machine, there is no effect caused by the modulated variables on an electrical or magnetic parameter of the machine. When the modulated variables cause an effect on an electrical or magnetic parameter of the machine, a fault condition is detected.