US 12,122,464 B2
Motor vehicle steering system with a control unit of redundant configuration
Adela Beres, Budapest (HU); Gergely Horvath, Fülöpszállás (HU); and Gergely Füzes, Budapest (HU)
Assigned to thyssenkrupp Presta AG, Eschen (LI); and thyssenkrupp AG, Essen (DE)
Appl. No. 17/252,448
Filed by thyssenkrupp Presta AG, Eschen (LI); and thyssenkrupp AG, Essen (DE)
PCT Filed Jun. 18, 2019, PCT No. PCT/EP2019/065948
§ 371(c)(1), (2) Date Dec. 15, 2020,
PCT Pub. No. WO2019/243294, PCT Pub. Date Dec. 26, 2019.
Claims priority of application No. 10 2018 114 828.3 (DE), filed on Jun. 20, 2018.
Prior Publication US 2021/0276613 A1, Sep. 9, 2021
Int. Cl. B62D 5/04 (2006.01); B62D 5/00 (2006.01); H02P 25/22 (2006.01); H02P 29/028 (2016.01)
CPC B62D 5/0484 (2013.01) [B62D 5/003 (2013.01); B62D 5/0463 (2013.01); H02P 25/22 (2013.01); H02P 29/028 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A redundant control device for a three-phase electric motor of a steering system of a motor vehicle, comprising:
a primary control path comprising a primary processing unit, and
a secondary control path comprising a secondary processing unit,
wherein the primary control path is connected to a first phase winding of the electric motor, and the secondary control path is connected to a second and a third phase winding of the electric motor for actuating the electric motor, and
wherein each phase winding is assigned an individual converter;
wherein the secondary processing unit is configured to calculate a setpoint motor torque on the basis of a torque input into a steering wheel and further input variables, and to determine, by means of a secondary motor regulating means on the basis of the setpoint motor torque, secondary motor currents for operating the second and third phase windings and to pass them on to two secondary converters of the individual converters;
wherein a switch is arranged between the primary processing unit and one of the secondary converters and the switch is configured to connect the primary processing unit to the secondary converter in the event of a fault in the secondary control path.