US 12,420,863 B2
Apparatus for and method of restricting rotation of steering wheel in steer-by-wire system
Dong Hee Kim, Yongin-Si (KR)
Assigned to HYUNDAI MOBIS CO., LTD., Seoul (KR)
Filed by HYUNDAI MOBIS CO., LTD., Seoul (KR)
Filed on Jul. 11, 2023, as Appl. No. 18/350,283.
Claims priority of application No. 10-2022-0146964 (KR), filed on Nov. 7, 2022.
Prior Publication US 2024/0149939 A1, May 9, 2024
Int. Cl. B62D 6/00 (2006.01); B62D 5/00 (2006.01); H02P 23/14 (2006.01)
CPC B62D 6/008 (2013.01) [B62D 5/006 (2013.01); H02P 23/14 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An apparatus for restricting rotation of a steering wheel in a steer-by-wire system, the apparatus comprising:
a steering angle acquisition unit configured to acquire a steering angle;
a driving unit configured to control an inverter of a motor to generate a reaction force torque in response to a rotation of a steering wheel; and
a processor configured to instruct the driving unit based on the steering angle such that the driving unit causes the inverter to generate the reaction force torque to restrict the rotation of the steering wheel in a driver getting-in and getting-off mode,
wherein the processor operates at least in one of a motor control mode and an inverter control mode,
wherein, in the motor control mode, the processor causes the driving unit to use pulse-width modulation (PWM) control to cause the inverter to generate the reaction force torque so that the steering wheel remains stationary, and
wherein, in the inverter control mode, the processor causes a third phrase electric wire of the motor to be shorted to the inverter of the motor such that a counter electromotive force is produced in the motor that generates the reaction force torque so that the steering wheel remains stationary.