US 11,987,297 B2
Motor-driven power steering system and control method thereof
Hyogi Min, Yongin (KR)
Assigned to HL MANDO CORPORATION, Pyeongtaek (KR)
Filed by HL MANDO CORPORATION, Pyeongtaek (KR)
Filed on Apr. 25, 2022, as Appl. No. 17/727,831.
Claims priority of application No. 10-2021-0055276 (KR), filed on Apr. 28, 2021.
Prior Publication US 2022/0348252 A1, Nov. 3, 2022
Int. Cl. B62D 5/04 (2006.01)
CPC B62D 5/0469 (2013.01) [B62D 5/0454 (2013.01); B62D 5/0463 (2013.01); B62D 5/0481 (2013.01); B62D 5/0421 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A motor-driven power steering system that assists in steering by transmitting auxiliary steering power by driving a motor when a steering wheel is steered, the motor-driven power steering system comprising:
a motor driver configured to drive the motor; and
a controller electrically connected to the motor driver,
wherein the controller is configured to:
receive a first rotation angle obtained by a steering wheel angle sensor according to steering of the steering wheel and a second rotation angle obtained by a motor position sensor,
when a steered position of the steering wheel is in an auxiliary steering limit section and a difference value between the first rotation angle and the second rotation angle is different from a predetermined reference value, change a rotation position of the steering wheel angle sensor and a rotation position of the motor position sensor to an initial original position,
when changed to the initial original position, receive the first rotation angle obtained by the steering wheel angle sensor according to steering of the steering wheel and the second rotation angle obtained by the motor position sensor again, and
control the motor driver to perform auxiliary steering based on the first rotation angle and the second rotation angle received again.