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:
Nov. 29, 2022
Filed:
Dec. 07, 2018
Abb Schweiz Ag, Baden, CH;
Piotr Lipnicki, Lublin, PL;
Daniel Lewandowski, Cracow, PL;
ABB Schweiz AG, Baden, CH;
Abstract
The subject of the invention is a method and a device for determination of a torsional deflection of a rotation shaft in the electromechanical drivetrain. The method uses a current and a voltage signals measurement of the driving electrical machine and an angular speed measurement of the shaft of the drivetrain and includes the step of measuring of a voltage Uof the DC link unit of a converter; the step of calculating a value of a load torque Tof the driving electrical machine; the step of detecting of an oscillation O(T) in the load torque Tand calculation magnitudes of characteristic frequencies of Fast Fourier Transform FFT(U) of the voltage Uof DC link unit; the step of determining of a timestamp indicators tfor oscillations O(T) and tof Ufor magnitudes of characteristic frequencies of FFT(U) of the voltage Uof DC link unit; the step of comparing the value of the timestamp indicators tand tand determining a torsional deflection of the rotation shaft if t<t; the step of presenting the result of the comparison to the user in a diagnostic unit.