A rotary electric machine control device for controlling driving of a rotary electric machine including a plurality of winding sets, includes: a plurality of drive circuits; and a plurality of control units, each of which includes: an individual current limit value calculation unit; a current limit value calculation unit; and a control signal calculation unit. The current limit value calculation unit switches between a current limit value sharing mode and a current limit value non-sharing mode. An electric power steering device includes: the rotary electric machine control device; the rotary electric machine that outputs an assist torque for assisting a steering operation of a steering wheel by a driver; and a power transmission unit that transmits a driving force of the rotary electric machine to a drive target.

A steering system for a motor vehicle, having a steering column, an electromechanical steering assistance apparatus, a sensor which is assigned to the steering column and is configured to sense a torque and a rotational angle of the steering column, and a regulator, wherein the electromechanical steering assistance apparatus comprises a motor having an angular position encoder which is configured to sense the motor rotational angle of the motor, wherein the regulator is configured to determine a torque of the electromechanical steering assistance apparatus, and wherein the regulator is also configured to determine a disturbance variable, which gives rise to an undesired steering sensation, in the steering system by means of a Kalman filter.

According to one or more embodiments, a steer by wire steering system includes a handwheel, and a handwheel actuator configured to secure a position of the handwheel. The securing includes determining a transition of the steer by wire steering system to an ingress/egress mode. The securing further includes, based on the determination that the steer by wire steering system is in the ingress/egress mode, computing a holding torque command based on a difference in a present angle of the handwheel and a target angle of the handwheel, which is caused by an input torque. Further, the securing includes generating a holding torque corresponding to the holding torque command to secure the position of the handwheel.

A vehicle control method for controlling a vehicle using a vehicle control apparatus includes: a sensor configured to detect a state outside a subject vehicle; and a control device. The vehicle control method includes: executing control of recovering a travel trajectory of the subject vehicle to a target trajectory, as ordinary control, by giving a steering amount in a lateral direction with respect to a travel lane of the subject vehicle; using detection data of the sensor to determine whether or not another vehicle is traveling in an adjacent lane to the travel lane of the subject vehicle; and when determining that the other vehicle is traveling in the adjacent lane ahead of the subject vehicle, increasing a response of the steering amount to a higher response than that in the ordinary control, before the subject vehicle passes the other vehicle.

A method of controlling a power steering system including at least one course control function, whereby a position setpoint is determined automatically according to a reference course that a vehicle is to be made to follow, then a motor setpoint applied to an assistance motor is adjusted accordingly, the method including a safety function which is distinct from the course control function and meets a higher ASIL safety level according to ISO-26262 standard, said safety function including a diagnostics subfunction according to which a control parameter such as the angular position of the steering wheel, the driver torque applied to the steering wheel, or the rate at which the steering wheel is turned is monitored in order to detect the onset of an alert situation considered to be hazardous, then an intervention subfunction according to which, if an alert situation is detected, the course control function is neutralized.

An inverter system failure is detected on the basis of the currents of respective phases detected by a current detection unit when carrying out switching control in accordance with a first drive mode in which all switching elements on a lower-side arm are switched on and all switching elements on an upper-side arm are switched off, and the currents of respective phases detected by the current detection unit when carrying out switching control in accordance with a second drive mode in which all of the switching elements on the upper-side arm are switched on and all of the switching elements on the lower-side arm are switched off.

An electric power steering apparatus that driving-controls a motor via inverters based on a current command value, and applies an assist force by the motor to a steering system, includes multi-system driving systems with the inverters for respective system-windings of the motor which is a multi-system motor, wherein respective multi-system current command value characteristics against a steering torque are applied so as to be disproportionate for left and right steering, to the respective multi-system driving systems, and an assist-control is performed in response to the individual current command value characteristics.

This invention is concerning a control apparatus for an AC rotary machine including: an AC rotary machine that includes a first winding and a second winding which have a phase difference; a first current detection unit that detects a current of the first winding; a second current detection unit that detects a current of the second winding; a control unit that calculates a first voltage command and a second voltage command on the basis of a detected current value; and a first detectability determination unit that determines a detectability of the current of the first winding, detected by the first current detection unit, on the basis of at least one of the voltage commands , wherein the control unit calculates the first voltage command and the second voltage command on the basis of the detected current value of the second winding when the current of the first winding is undetectable.

In construction of an electric drive device such as an electric power steering device or the like, there is employed a cylindrical metal housing that has therein in order first, second, third and fourth spaces coaxially arranged to respectively house therein a power circuit part, a power conversion circuit part, a control circuit part and an electric motor, a circular heat transfer metal substrate is arranged in the cylindrical metal housing between the first and second spaces and the circular heat transfer metal substrate has a cylindrical outer wall that is in contact with a cylindrical inner surface of the cylindrical metal housing, one flat surface to which a basal metal plate of the power circuit part is intimately connected and another flat surface to which a basal metal plate of the power conversion circuit part is intimately connected.

Provided is a power conversion device for suppressing a variation amount of a bus current to decrease a power loss in consideration of control of detecting the bus current during operation. In control by a power conversion part in accordance with a switching signal, a voltage vector is caused to bring a mode into a power running mode at a timing of detecting the bus current when an AC rotating machine is in a power running operation state, and the voltage vector is caused to bring the mode into a regeneration mode at a timing of detecting the bus current when the AC rotating machine is in a regeneration operation state, thereby decreasing the power loss due to the variation in the bus current.