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. 14, 2005
Filed:
Dec. 21, 2001
Hansjörg Berroth, VS-Obereschach, DE;
Alexander Hahn, Sauldorf, DE;
Frank Heller, St. Georgen, DE;
Frank Jeske, St. Georgen, DE;
Arno Karwath, Rottweil, DE;
Arnold Kuner, St. Georgen, DE;
Hans-dieter Schondelmaier, St. Georgen, DE;
Hermann Rappenecker, Vöhrenbach, DE;
Günther Strasser, St. Georgen, DE;
Hansjörg Berroth, VS-Obereschach, DE;
Alexander Hahn, Sauldorf, DE;
Frank Heller, St. Georgen, DE;
Frank Jeske, St. Georgen, DE;
Arno Karwath, Rottweil, DE;
Arnold Kuner, St. Georgen, DE;
Hans-Dieter Schondelmaier, St. Georgen, DE;
Hermann Rappenecker, Vöhrenbach, DE;
Günther Strasser, St. Georgen, DE;
ebm-papst St. Georgen GmbH & Co. KG, St. Georgen, DE;
Abstract
A method of limiting current in a DC motor acts on a full bridge circuit () through which the stator winding arrangement () of that motor is supplied with current. Upon response of the current limiter, energy supply to the stator winding arrangement () from the DC power network is interrupted. The stator winding arrangement is then operated substantially in short circuit via semiconductor switches of the full bridge circuit, and the decaying current flowing in that context serves substantially to continue driving the motor. When that current has reached a lower value, energy supply from the DC power network to the motor is once again activated. The effective value of the current flowing to the motor is preferably reduced when the current limiter responds. The time period during which that current flows, in the form of current blocks, is then increased in compensatory fashion.