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. 04, 2012
Filed:
Jul. 19, 2006
Christian Rudel, Königsfeld, DE;
Jörg Hornberger, Dornstetten-Aach, DE;
Michael Schäuble, Villingen, DE;
Michael Kisch, St. Georgen, DE;
Christian Rudel, Königsfeld, DE;
Jörg Hornberger, Dornstetten-Aach, DE;
Michael Schäuble, Villingen, DE;
Michael Kisch, St. Georgen, DE;
EBM-Papst St. Georgen GmbH & Co. KG, St. Georgen, DE;
Abstract
An electric motor () has: a stator () and a rotor () having a shaft (). The rotor () has a sensor magnet () having a number SP of sensor poles () for generating a predetermined distribution of the magnetic flux density, such that SP=2, 4, 6, 8, etc. The motor also has at least two rotor position sensors () for generating rotor position signals (B_S, B_S) characterizing the magnetic flux density, the rotor position sensors () being arranged in the region () of the circumference of the sensor magnet (). The motor also has an evaluation apparatus () that ascertains, from the rotor position signals (B_S, B_S), an absolute value (phi_el, phi_mech) for the rotational position of the rotor (). A method of generating an absolute value for the rotational position of an electric motor is likewise described.