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:
May. 25, 2004
Filed:
Aug. 29, 2002
Applicant:
Inventors:
Claus Osselmann, Kaltenberg, DE;
Peter Hellmann, Obermeitingen, DE;
Lutz Troeder, Türkenfeld, DE;
Assignee:
Hilti Aktiengesellschaft, Schaan, LI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05F 1/10 ; H02P 7/00 ;
U.S. Cl.
CPC ...
G05F 1/10 ; H02P 7/00 ;
Abstract
A process and a circuit ( ) for regulating the speed of an electric motor ( ) having a high speed (N ) to at least one additional lower speed (N , N , N ), whereby, in a first prioritized step, depending on a preselected speed (N , N ), the regulation of the speed to a lower effective motor voltage (Ueff) has an upper limit, and in a second step, depending on the torque (M) needed for the regulation to this preselected speed (N , N ), the effective motor voltage (Ueff) is regulated within the limited range.