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. 02, 2002
Filed:
Jul. 19, 2000
Jürgen Böhm, Oberneisen, DE;
Continental Teves AG & Co., OHG, Frankfurt, DE;
Abstract
Electrical direct current actuators, which have a distinct low-pass behavior with respect to the actuating signal, are frequently used in electronic control and regulation devices. Typical examples of such actuators are d.c. motors or electromagnets. In order to minimize the power losses when controlling such electric d.c. actuators, the associated power amplifiers usually are controlled by a pulse-width modulated actuating signal in the kHz frequency. In order to ensure that the actuator also is activated with the predefined actuating signal when there are variations in the supply direct voltage, the calculated actuating signal is multiplied by a scaling factor in a first functional module, with this scaling factor being obtained in another functional module on the basis of the relationship between the actual supply voltage and the nominal supply voltage. This rescaled actuating signal is then fed to the pulse-width modulator instead of the output actuating voltage causing the pulse duty factor to be adapted to the actual supply voltage.