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. 21, 2009
Filed:
Aug. 11, 2004
Applicant:
Johannes Schwarzkopf, Marktheidenfeld, DE;
Inventor:
Johannes Schwarzkopf, Marktheidenfeld, DE;
Assignee:
Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Wuerzburg, Wuerzburg, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P 23/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a method for improving commutation of the at least one phase (Pi) of an electric motor (), the commutation angle (alpha) of the one or more phases (Pi) is continuously varied in accordance with the rotary frequency (f) of the electromagnetic energizing field (F) of the electric motor () and/or in accordance with an adjustable variable (S) which is characteristic of the driving power. A device () suitable for carrying out the method has a frequency converter) and a control unit () controlling the same and adapted to carry out the method.