US 12,311,998 B2
Steering control apparatus, steering assist apparatus and steering system
Dae Geun Choi, Gyeonggi-do (KR)
Assigned to HL MANDO CORPORATION, Gyeonggi-do (KR)
Filed by HL MANDO CORPORATION, Gyeonggi-do (KR)
Filed on May 11, 2021, as Appl. No. 17/317,653.
Claims priority of application No. 10-2020-0056876 (KR), filed on May 13, 2020.
Prior Publication US 2021/0354744 A1, Nov. 18, 2021
Int. Cl. B62D 1/181 (2006.01); B60W 10/20 (2006.01); B62D 1/185 (2006.01); B62D 5/00 (2006.01); B62D 5/04 (2006.01)
CPC B62D 1/181 (2013.01) [B60W 10/20 (2013.01); B62D 1/185 (2013.01); B62D 5/006 (2013.01); B62D 5/0409 (2013.01); B62D 5/046 (2013.01); B62D 5/0463 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A steering control device, comprising an input-side steering control module controlling an input-side steering motor to assist an input-side mechanism mechanically separated from an output-side mechanism connected with a wheel and connected with a steering wheel,
the input-side steering control module comprising:
a controller unit generating a steering motor control signal and a telescopic motor control signal; and
a steering motor power source unit controlling the input-side steering motor based on the steering motor control signal and controlling a telescopic motor based on the telescopic motor control signal, wherein
the steering motor power source unit includes:
a switch element driver generating a switch control signal based on the steering motor control signal;
a first inverter generating a first assist current by converting electric energy according to the switch control signal and providing the first assist current to the input-side steering motor; and
a second inverter generating a second assist current by converting the electric energy according to the telescopic motor control signal and providing the second assist current to the telescopic motor,
wherein the second inverter comprises a first relay as a high-side switch element corresponding to a plus (+) phase of the telescopic motor, a second relay as a high-side switch element corresponding to a minus (−) phase of the telescopic motor, a fourth FET (field effect transistor) as a low-side switch element corresponding to the plus (+) phase of the telescopic motor, and a fifth FET as a low-side switch element corresponding to the minus (−) phase of the telescopic motor, and
wherein the switch element driver is configured to control one of the fourth FET and the fifth FET of the second inverter to be turned-on and turned-off repeatedly by a FET gate control signal of PWM (pulse width modulation) while one of the first relay and the second relay of the second inverter is being controlled to maintain a turned-on state.