Method and circuit arrangement for the electrical control and/or regulation of the movement of an electrically driven unit

Abstract

A method for electrical control and/or regulation of the movement of an electrically-driven unit, in particular, a window winder for a sunroof of a motor vehicle, is disclosed. A correlation parameter for the operating force of the unit is measured for trapping protection and a switching off or reversing of an operating movement is carried out as trapping protection, when the correlation parameter for the operating force exceeds a threshold value which corresponds to a given trapping force. A filter for temporal filtering of the correlation parameter for the operating force of the unit is provided, whereby the filter is deactivated in the presence of given operating conditions. According to the invention, the decision on the activation and deactivation of the filter is achieved, depending on an alternating signal fraction of the measured correlation parameter, or another parameter proportional thereto. The motor current is preferably recorded as the correlation parameter for the operating force and a decision is made, based m on a parameter characterising the size of the alternating current fraction and/or a parameter characterising the size of the alternating voltage fraction and/or a parameter characterising the rotational speed of the rotor, as to whether the directly detected motor current signal or the filtered motor current signal is used for calculation of the operating force.

Dependencies are inferred from the claim text.