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:
May. 23, 2006
Filed:
Dec. 13, 2003
Jörg Hornberger, Dornstetten, DE;
Hermann Rappenecker, Vöhrenbach, DE;
Christian Rudel, Königsfeld, DE;
Siegfried Schreiner, Villingen-Schwenningen, DE;
Jörg Hornberger, Dornstetten, DE;
Hermann Rappenecker, Vöhrenbach, DE;
Christian Rudel, Königsfeld, DE;
Siegfried Schreiner, Villingen-Schwenningen, DE;
ebm-papst St. Georgen GmbH & Co. KG, St. Georgen, DE;
Abstract
An electric motor has a stator and an external rotor (). Its external rotor () has a sensor magnet () having a plurality SP of sensor poles (). The motor also has: at least one rotor position sensor () for generating a rotor position signal and a rotor position evaluation arrangement for generating an absolute value for the rotor position, which apparatus comprises an A/D converter () having a resolution of at least two bits, the at least one rotor position sensor () being connected to the A/D converter. In order to enable obtaining different digital values, even at rotational positions within the angle range of one sensor pole, each analog rotor position sensor signal is converted by the A/D converter into a digital value having at least two bits.