US 12,139,212 B2
Power assist control apparatus and power assist control method
Jae Hoon Bae, Seongnam-si (KR)
Assigned to HL MANDO CORPORATION, Pyeongtaek-si (KR)
Appl. No. 17/426,750
Filed by HL MANDO CORPORATION, Pyeongtaek-si (KR)
PCT Filed Jan. 31, 2020, PCT No. PCT/KR2020/001527
§ 371(c)(1), (2) Date Jul. 29, 2021,
PCT Pub. No. WO2020/159311, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 10-2019-0013371 (KR), filed on Feb. 1, 2019.
Prior Publication US 2022/0097754 A1, Mar. 31, 2022
Int. Cl. B62D 5/04 (2006.01); B62D 5/00 (2006.01); B62D 3/04 (2006.01); F16H 37/06 (2006.01); H02P 23/14 (2006.01)
CPC B62D 5/046 (2013.01) [B62D 5/008 (2013.01); B62D 3/04 (2013.01); B62D 5/0493 (2013.01); F16H 37/065 (2013.01); H02P 23/14 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A power assist control device, comprising:
a main motor driven at a first rotation speed;
a sub-motor driven at a second rotation speed; and
a controller receiving steering information for a steering wheel, calculating a target rotation speed of an output shaft, and controlling the main motor and the sub-motor to allow the output shaft to rotate at the target rotation speed,
wherein the controller:
calculates a first rotation speed smaller than the target rotation speed, outputs, to the main motor, a first control signal instructing to drive the main motor according to the first rotation speed; and
calculates a second rotation speed not smaller than the target rotation speed, and outputs, to the sub-motor, a second control signal instructing to drive the sub-motor according to the second rotation speed, and
wherein the controller calculates the first rotation speed based on a first gear ratio of a first decelerator coupled to the main motor.