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:
Jun. 27, 2006
Filed:
Oct. 14, 2003
Applicants:
Arno Karwath, Rottweil, DE;
Mojtaba Moi, Königsfeld, DE;
Eberhard Wünsch, St. Georgen, DE;
Inventors:
Assignee:
Papst Licensing GmbH & Co. KG, Spaichingen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 3/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
A drive circuit for brushless DC motors including a rotor and a stator with at least one stator coil includes a commutation device which supplies commutation pulses of drive current to the stator coil(s). The commutation device senses the rotor position and calculates current rotor speed therefrom. The rotor speed is then used to shift the commutation circuits according to predetermined functions. The shifting of commutation currents is occasioned by shifting either or both of the ignition part of a commutation pulse and the extinction part of such pulse.