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:
Jun. 24, 2025
Filed:
Feb. 11, 2021
Lenze SE, Aerzen, DE;
Torben Jonsky, Hannover, DE;
Heiko Stichweh, Springe, DE;
Lenze SE, Aerzen, DE;
Abstract
A method for determining a rotational angle position of a rotor of a multiphase electrical machine, includes the steps of: generating phase voltages for the multiphase electrical machine by pulse width modulation in accordance with a drive voltage vector circulating in a stator-fixed coordinate system. During a determination time interval: a) generating a test voltage vector, vectorially adding the test voltage vector and the actual drive voltage vector to form a sum vector, outputting the sum vector, and measuring a resulting change of a current vector formed from phase currents; b) repeating step a) for a changed rotational angle position and/or a changed value of the drive voltage vector and for a changed test voltage vector a number n of times so that a total of n+I different test voltage vectors and sum vectors are generated and n+I resulting changes of the current vector are measured; and c) estimating the rotational angle position of the rotor in accordance with the total of n+I measured changes of the current vector.