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:
Feb. 22, 2011
Filed:
Jul. 27, 2006
Christian Rudel, Königsfeld, DE;
Joerg Hornberger, Dornstetten-Aach, DE;
Michael Schaeuble, VS-Villingen, DE;
Christian Rudel, Königsfeld, DE;
Joerg Hornberger, Dornstetten-Aach, DE;
Michael Schaeuble, VS-Villingen, DE;
Ebm-Papst St. Georgen GmbH & Co. KG, St. Georgen, DE;
Abstract
An electric motor has a stator () having a bearing tube () made of a magnetically transparent material; it also has a rotor () having a rotor shaft () that is at least partially journaled in the bearing tube (), and has a ring magnet () that is fixedly arranged on the rotor shaft () inside the bearing tube (). Two magnetic-field-dependent analog sensors (″) are arranged on a circuit board () outside the bearing tube (), at an angular distance (PHI) from one another, in order to generate rotor position signals as a function of the rotational position of the ring magnet (). A corresponding device () that serves to control the motor is provided, in order to process these rotor position signals into a signal that indicates the absolute rotational position of the rotor ().