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. 04, 2015
Filed:
Feb. 18, 2010
Hasan Gökcer Albayrak, Berlin, DE;
Torsten Böttger, Radebeul, DE;
Jörg Skrippek, Wustermark, DE;
BSH Hausgeräte GmbH, Munich, DE;
Abstract
In a method for determining a load and/or an unbalance of a laundry drum of a washing machine driven by an electric motor having a stator with at least one winding coupled to a power inverter controlled by a control unit, the laundry drum is accelerated to a predetermined rotational speed and then slowed down. During the slow-down, the motor operates in generator mode and an electric current flowing through the at least one winding and/or an electric intermediate circuit voltage is measured. The time dependence of the electric power supplied by the electric motor in generator mode is evaluated during a revolution of the laundry drum. The unbalance and/or the load are determined from the measured current values and/or the intermediate circuit voltage and from the determined electric power. A corresponding circuit arrangement and a washing machine with this circuit arrangement are also disclosed.