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:
Jan. 27, 2009
Filed:
Mar. 07, 2005
Roland Finkler, Erlangen, DE;
Hans-georg Köpken, Erlangen, DE;
Roland Finkler, Erlangen, DE;
Hans-Georg Köpken, Erlangen, DE;
Siemens Aktiengesellschaft, München, DE;
Abstract
The invention relates to a method for determining the angular position (theta) of a rotor () pertaining to an electric motor () and comprising a number of pairs of poles. Said method consists of the following steps: a pulse pattern (PMPMPM) with a pulse duration (T) flows through at least one stator coil () of the electric motor (), such that the rotor () does not rotate by more than 90 DEG, divided between the number of pairs of poles, during the pulse duration (T); the angular acceleration (alpha) of the rotor (), caused by the pulse pattern flowing through the at least one stator coil, () is detected; and the angular position (theta) of the rotor () is determined by means of the correlation between the flow through the stator coil () and the angular acceleration (alpha) of the rotor ().