METHOD OF CONTROLLING AN ELECTRIC MOTOR OF A POWER STEERING SYSTEM, AND POWER STEERING SYSTEM

摘要

A method of controlling an electric motor of a power steering system having at least three windings is described, wherein a control unit applies a current to the windings of the electric motor to generate a total torque having a value which is ascertained by the control unit from a set-point torque for steering assistance and a set-point torque for damping. A damping set-point circuit ascertains the set-point torque for damping and a steering assist set-point circuit ascertains the set-point torque for steering assistance. A monitoring circuit monitors the function of the windings of the electric motor. In the event of a malfunction of any of the windings, the monitoring circuit outputs an error signal, upon which the set-point torque for steering assistance is reduced.

主权项

1. A method of controlling an electric motor of a power steering system having at least three windings comprising:
applying a current to the windings of the electric motor by a control unit to generate a total torque having a value which is ascertained by the control unit from a set-point torque for steering assistance and a set-point torque for damping; ascertaining the set-point torque for damping by a damping set-point circuit; ascertaining the set-point torque for steering assistance by a steering assist set-point circuit; monitoring a proper function of the windings of the electric motor by a monitoring circuit; and in the event of a malfunction of any of the windings, outputting an error signal by the monitoring circuit, upon which the set-point torque for steering assistance is reduced.