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:
Nov. 22, 2005
Filed:
Aug. 14, 2001
Alexander Hahn, Sauldorf, DE;
Hermann Rappenecker, Vöhrenbach, DE;
Alexander Hahn, Sauldorf, DE;
Hermann Rappenecker, Vöhrenbach, DE;
ebm-papst St. Georgen GmbH & Co. KG, St. Georgen, DE;
Abstract
The invention concerns a method of regulating the current in a direct current machine with which are associated an arrangement for generating a current target value signal, as well as a PWM generator (FIG.) whose output signal (PWM) is controllable by means of a control signal (u) and controls the current in the direct current machine, having the following steps: a) the pulse duty factor of the PWM generator is controlled with the control signal (u); b) with the output signal (PWM) of the PWM generator, the current in the direct current machine is controlled in such a way that a pulsed direct current (i; i') is obtained in a supply lead thereof; c) a pulsed current-dependent signal (u) is derived from this pulsed direct current (i; i′) and is compared to the current target value signal (PHI); d) as a function of the result of that comparison, the control signal (u) for controlling the PWM generator () is modified in such a way that the current in the direct current machine is regulated to the desired target value.