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:
Jul. 23, 2013
Filed:
May. 06, 2011
Applicant:
René Wichert, Durlangen, DE;
Inventor:
René Wichert, Durlangen, DE;
Assignee:
Andreas Stihl AG & Co. KG, Waiblingen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 6/18 (2006.01); H02P 1/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to a method of controlling the run-up of an electronically commutated electric motor () to drive a tool. A rotor () rotates in the rotating field () of the stator (). The field windings () alternately have a supply voltage applied thereto via an actuation unit () in order to obtain an advancing motor rotating field. For advancing the rotating field in the rotational direction () of the rotor (), the inductance of the arrangement of the field coils (), which is ascertained via a changing measuring current (I), is evaluated and the advancement is carried out upon reaching a maximum.