Patent · US Active

Method for operating an electric motor and apparatus for performing the method

US8248017B2 · kind B2 · utility

1Cited by

0References

13Claims

0Family size

Assignee

Diehl AKO Stiftung & Co. KG · DE

Inventors

Martin Weinmann · Bad Waldsee, DE
Stefan Zeh · Schallstadt, DE
Rainer Frisch · Schallstadt, DE
Hartmut Wauer · Leutkirch im Allgäu, DE
Nicola-Valeriu Olarescu · Schallstadt, DE
Radu Florea · Koblenzer Straße, DE
Martin Rieser · Kempten, DE

Key dates

Filing date	Nov 9, 2009
Grant date	Aug 21, 2012
Priority date	—
Expiry date	Oct 12, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH02P3/22
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.