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1. (WO2018036615) MOISTURE SENSING IN ELECTRIC MOTORS OF MOTOR VEHICLE STEERING SYSTEMS WITH PULL UP RESISTOR

Pub. No.:    WO/2018/036615    International Application No.:    PCT/EP2016/069902
Publication Date: Fri Mar 02 00:59:59 CET 2018 International Filing Date: Wed Aug 24 01:59:59 CEST 2016
IPC: B62D 5/04
Applicants: THYSSENKRUPP PRESTA AG
thyssenkrupp AG
Inventors: RÁCZ, Gergely
KONFÁR, Attila
Title: MOISTURE SENSING IN ELECTRIC MOTORS OF MOTOR VEHICLE STEERING SYSTEMS WITH PULL UP RESISTOR
Abstract:
The invention relates to a motor vehicle steering system with an electric motor (9) arranged in a motor housing (9'), the electric motor (9) having at least three phases (U,V,W), wherein for each phase (U,V,W) a high side MOSFET (14) and a low side MOSFET (14) is assigned, the MOSFETs (14) being part of an inverter (13) which supplies voltages into the electric motor (9), wherein the electric motor (9) has a first non-insulated contact point and the motor housing (9') has a second non-insulated contact point, wherein the two contact points are design such that water ingressed into the motor housing can electrically connect the electric motor (9) with the motor housing (9') via the non-insulated contact points and that a pull-up resistor (15) is placed in parallel to one of the high side MOSFETs (14) of a selected phase (U,V,W), wherein a measurement unit (16) is configured to detect the selected phase voltage as an indicative of water being present in the motor housing (9').