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:
Apr. 24, 2012
Filed:
Apr. 10, 2009
Klaus Graner, Uttenweiler-Ahlen, DE;
Oliver Fenker, Attenweiler, DE;
Johann Lis, Riedlingen, DE;
Thomas Muenst, Fischbach, DE;
Klaus Graner, Uttenweiler-Ahlen, DE;
Oliver Fenker, Attenweiler, DE;
Johann Lis, Riedlingen, DE;
Thomas Muenst, Fischbach, DE;
Liebherr-Components Biberach GmbH, Biberach/Riss, DE;
Abstract
A winch for elevating at a plant, in particular for cranes, cable-operated excavators, and similar construction machinery, has a hoisting drum, an electric motor for the drive of the hoisting drum which is received in the interior of the hoisting drum, and power electronics and/or control electronics for the electric motor including at least one frequency inverter and/or frequency converter. The power electronics and/or control electronics for the electric motor are received at least partly in the interior of the hoisting drum. With the compact construction of the winch, short cabling distances are achieved, interference emissions having negative effects on electromagnetic compatibility are avoided, and voltage overshoots impairing the service life of the inverter and the motor are reduced.