Control device and control method of electric power steering system
AssigneeHl Mando Corporation
InventorsSu Min Lee, Kyu Yeong Je
Life of this patent
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Abstract
The present embodiments relate to a control device and method for an electric power steering (EPS) system, and an EPS system including the same. A control device according to an embodiment may include a steering controller configured to control a rotation of a motor linked to a steering wheel or a wheel of a vehicle, and a wake-up circuit configured to, in an ignition-off state of a vehicle, wake up the steering controller using a change in current consumption of a motor rotation detection element due to forced rotation of the motor by external force, wherein the steering controller may apply a reaction torque to the motor to suppress the forced rotation of the motor after waking up.
Claims18
A device for controlling an electric power steering system, the device comprising:
- a steering controller configured to control a motor operably connected to a steering wheel or a wheel of a vehicle;
- and
- a wake-up circuit configured to, in an ignition-off state of the vehicle, wake up the steering controller using a change in current consumption of a motor rotation detector associated with rotation of the motor caused by external force;
- wherein the steering controller is configured to, after being woken up, control to apply a reaction torque to the motor to suppress the rotation of the motor caused by the external force, and
- wherein the motor rotation detector is configured to generate a first consumption current in response to non-rotation of the motor, and generate a second consumption current greater than the first consumption current in response to the rotation of the motor.
A method for controlling an electric power steering system, the method comprising:
- in an ignition-off state of a vehicle, waking up, by a wake-up circuit, a steering controller using a change in current consumption of a motor rotation detector associated with rotation of a motor caused by external force, wherein the motor is connected to a steering wheel or a wheel of the vehicle;
- and
- after the steering stroller is woken up by the wake-up circuit, controlling, by the steering controller, to apply a reaction torque to the motor to suppress the rotation of the motor caused by the external force,
- wherein the motor rotation detector generates a first consumption current if the motor is not rotating, and generates a second consumption current greater than the first consumption current when the motor is rotating.
Dependencies are inferred from the claim text.