Method for operating an electrical drive unit
AssigneeConti Temic microelectronic GmbH
InventorsErwin Kessler, Wolfgang Schulter
Life of this patent
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Abstract
The invention relates to a simple, economical and reliable method for providing anti-jamming protection. According to said method, the excess force—the difference between the driving force and the friction force—is compared with a trigger threshold. To this end, the curve of the friction force of the current actuation process, which is dependent on the actuation path of the electrical drive unit, is compared to the curve of the friction force of at least one previous actuation process and the trigger threshold value is modified according to how the friction force curves correspond. The invention also relates to a method for providing anti-jamming protection for an electrical drive unit for window lifting drives.
Claims14
A method for operating an electrical drive unit, wherein anti-jamming protection is realized by comparing an excess force (FO) defined as the difference between the driving force (FA) and the friction force (FR), with a trigger threshold value (FS), characterized in that the characteristic curve of the friction force (FR), which depends on the operating distance (s) of the electrical drive unit, of an actual driving operation (BV1) is compared with at least one characteristic curve of the friction force (FR) of a past driving operation (BV2 . . . BVn), and that the trigger threshold value (FS) is varied in response to the conformity of the characteristic curves of the friction force (FR) of the actual driving operation (BV1) and of at least one past driving operation (BV2 . . . BVn).
Dependencies are inferred from the claim text.