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:
Aug. 03, 2021
Filed:
Apr. 25, 2018
Robert Bosch Gmbh, Stuttgart, DE;
Alexander Maass, Kornwestheim, DE;
Gholamabas Esteghlal, Stuttgart-Weilimdorf, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The invention relates to a method and device for determining the position angle of a rotor () in an electric synchronous machine (). The device is designed to comprise: a voltage generator () for generating electrical voltage pulses at angles in a coordinate system fixed in respect of the stator when the rotor () is stationary; a measuring device () for measuring any electrical current value returning to the electrical voltage pulses generated by the voltage generator (); and a computing device (), which is designed: —to store a current signal curve of the current values measured; —to generate a zero-mean current signal curve by shifting the current signal curve or the measured current values; —to compute an integral function () of the zero-mean current signal curve; and—to determine the position angle of the rotor () on the basis of the computed integral function ().