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1. (WO2018202237) METHOD AND DEVICE FOR DETERMINING THE ABSOLUTE POSITION OF A COMPONENT OF AN ACTUATOR ROTATING ABOUT A ROTATIONAL AXIS, IN PARTICULAR A CLUTCH ACTUATOR

Pub. No.:    WO/2018/202237    International Application No.:    PCT/DE2018/100306
Publication Date: Fri Nov 09 00:59:59 CET 2018 International Filing Date: Fri Apr 06 01:59:59 CEST 2018
IPC: F16D 25/00
F16D 48/00
Applicants: SCHAEFFLER TECHNOLOGIES AG & CO. KG
Inventors: DIETRICH, Markus
Title: METHOD AND DEVICE FOR DETERMINING THE ABSOLUTE POSITION OF A COMPONENT OF AN ACTUATOR ROTATING ABOUT A ROTATIONAL AXIS, IN PARTICULAR A CLUTCH ACTUATOR
Abstract:
The invention relates to a method for determining the absolute position of a component of an actuator rotating about a rotational axis, in particular a clutch actuator, wherein the component has a co-rotating magnetic element (18), and the absolute position of the magnetic element (18) is detected by way of a multi-turn sensor (16) located opposite the magnetic element (18), which is supplied with a voltage. In a method, in which the absolute position can be detected without great constructional effort, a position of the magnetic element (18) is monitored by a Wiegand wire unit (19), which detects a movement of the component when the actuator (3, 12, 13) is turned off, and if a movement is detected, transmits a voltage pulse to the multi-turn sensor (16) for measuring the current position of the component.