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:
Aug. 21, 2012
Filed:
Nov. 09, 2009
Martin Weinmann, Bad Waldsee, DE;
Stefan Zeh, Wangen, DE;
Rainer Frisch, Wangen, DE;
Hartmut Wauer, Kisslegg, DE;
Nicola-valeriu Olarescu, Wangen, DE;
Radu Liviu Florea, Nürnberg, DE;
Martin Rieser, Wangen, DE;
Martin Weinmann, Bad Waldsee, DE;
Stefan Zeh, Wangen, DE;
Rainer Frisch, Wangen, DE;
Hartmut Wauer, Kisslegg, DE;
Nicola-Valeriu Olarescu, Wangen, DE;
Radu Liviu Florea, Nürnberg, DE;
Martin Rieser, Wangen, DE;
Diehl AKO Stiftung & Co. KG, Wangen, DE;
Abstract
A method for operating an electric motor with at least two motor terminals that are driven by a control device contains the steps of short-circuiting of at least two of the motor terminals of the electric motor by the control device; measurement of the motor phase currents at the short-circuited motor terminals; and identification of a standstill of the electric motor if a magnitude and/or a frequency of the motor phase currents measured lies below a predefined limit value. In the case of such a reliable identification of the standstill of the electric motor, an enable signal can then advantageously be generated in order, by way of example, to enable access to an apparatus driven by the electric motor.