A vehicle steering device includes a steering wheel operated by a driver to steer a vehicle; a steering reaction force motor that applies a reaction force to the steering wheel; a turning device that turns turning wheels of the vehicle by a turning motor; a clutch mechanism that mechanically connects and disconnects the steering wheel with and from the turning device; a control device that provides control so that a turning angle is based on a steering angle of the steering wheel; and a temperature sensor that measures a temperature. The vehicle steering device mechanically couples the steering wheel and the turning device and activates the steering wheel and the turning device if the temperature is a predetermined value or lower.

A brushless motor for an electric power steering device that assists a steering operation includes: a stator having a plurality of winding sets for a plurality of systems respectively; and a rotator having a ferrite magnet. In the motor, a maximum current flowing without any demagnetization at high temperature is large. Hence, the torque of the motor is easily ensured at high temperature. In particular, when a failure occurs in one system, it is easy to ensure the torque of the normal system even at high temperature.

A method of controlling an electric motor of a drive device of a power steering system, in which a temperature sensor senses the temperature of the drive device and transmits information about the temperature of the drive device to an evaluation unit, the evaluation unit estimates the temperature of a gearbox based on the temperature of the drive device, and, based on the estimated temperature of the gearbox, the evaluation unit adjusts a requested torque of the electric motor.

A method for operating a steering system of a vehicle is proposed, wherein the steering system comprises a steering mechanism and at least one electric motor cooperating with the steering mechanism, wherein a moisture parameter correlating with the moisture in the steering system is determined, wherein, in order to determine the moisture parameter, the steering mechanism is brought into a defined test position and/or blocked in the test position, and the electric motor is actuated with an excitation signal, and wherein the moisture parameter is determined in that, during the actuation of the electric motor with the excitation signal, a motor torque of the electric motor and a rotor position angle of the electric motor is monitored and a change in the motor torque is evaluated according to the rotor position angle.

A method is disclosed for protecting the components of a steer-by-wire steering system, where the steer-by-wire steering system comprises a self-locking spindle drive in which the spindle is displaced linearly by driving a positionally fixed spindle nut in rotation. As a function of the speed of the vehicle, the linear displacement of the spindle relative to the spindle nut is summed continuously with respect to time until a first threshold value has been reached. A control unit, a non-transitory computer-readable storage medium, and a steer-by-wire system are also disclosed.

A method includes receiving motor velocity data, and, in response to a determination that the motor velocity data indicates that a velocity of a motor is below a threshold velocity: calculating a thermal metric corresponding to a phase imbalance of the motor; identifying at least one thermal mitigation parameter based on the thermal metric; generating at least one thermal management motor position command based on the at least one thermal mitigation parameter; and selectively controlling the motor according to the thermal management motor position command.

A vehicle steering apparatus includes a steering reaction force generating device including a steering reaction force motor, a turning device including a turning motor, a clutch device including an electromagnetic solenoid configured to mechanically engage and disengage the steering reaction force generating device and the turning device, a turning motor temperature sensor configured to detect a motor temperature value of the turning motor, a current integrated value acquiring unit configured to acquire a current integrated value of the turning motor, an abnormality diagnostic unit configured to diagnose whether the turning motor temperature sensor is normal, and a drive control unit configured to control the drive of the electromagnetic solenoid on the basis of the current integrated value of the turning motor acquired by the current integrated value acquiring unit if the abnormality diagnostic unit diagnoses the turning motor temperature sensor as being in an abnormal state.

The embodiments relates to a steering control device and method. Specifically, a steering control device according to the embodiments may include a first steering control module receiving a steering angle of a steering wheel from a steering angle sensor, calculating a position of a rack corresponding to the steering angle, and transmitting the position of the rack to a road wheel actuator (RWA) and a second steering control module to which a control right for the first steering control module is transferred when the first steering control module is determined to have a failure.

An apparatus and method for detecting damage to a steering system, wherein values of moisture in the steering system are determined with a sensor within the steering system, wherein the damage is detected as a function of the values.

A rotating electric machine control device includes a first system controller and a second system controller, an overheat protection controller and an abnormality detector. The overheat protection controller includes a temperature estimator and a restricted current calculator. The temperature estimator estimates system temperatures as well as other temperature, including a shared component temperature of a shared component that is connected to both of plural systems in a shared manner. The restricted current calculator calculates restricted current values, based on the system temperatures and the shared component temperature. At least one of the system temperatures, the shared component temperature, and/or the restricted current values is changed from an all-systems normal time, when at least one of a plurality of systems is abnormal.