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. 27, 2022
Filed:
May. 03, 2018
Hamilton Bonaduz Ag, Bonaduz, CH;
HAMILTON BONADUZ AG, Bonaduz, CH;
Abstract
There is provided a method for contactless determination of the position of a driven moving portion () of an electric motor () by means of a plurality of magnetic field sensors (), wherein the moving portion is movably arranged with respect to a stator () and has a plurality of permanent magnets () which generate a moving-portion magnetic field having a plurality of periodically spaced apart maxima, and wherein the plurality of magnetic field sensors are arranged along a movement path () of the moving portion. The method comprises the following steps: by means of the plurality of magnetic field sensors, determining a plurality of measured values () for a momentary magnetic field that is generated by the plurality of permanent magnets and dependent on the position of the moving portion, determining a specific spectral signal component () from the plurality of measured values (), the specific spectral signal component having the spatial frequency corresponding to the distance between adjacent like maxima of the moving-portion magnetic field, and determining the position of the driven moving portion by means of the specific spectral signal component.