US 12,155,335 B2
Electronic parking brake system and control method therefor
Wookhyeon Kim, Suwon-si (KR)
Assigned to HL MANDO CORPORATION, Gyeonggi-Do (KR)
Appl. No. 17/779,378
Filed by HL MANDO CORPORATION, Pyeongtaek-si (KR)
PCT Filed Nov. 19, 2020, PCT No. PCT/KR2020/016355
§ 371(c)(1), (2) Date May 24, 2022,
PCT Pub. No. WO2021/107501, PCT Pub. Date Jun. 3, 2021.
Claims priority of application No. 10-2019-0154786 (KR), filed on Nov. 27, 2019.
Prior Publication US 2022/0399849 A1, Dec. 15, 2022
Int. Cl. B60T 5/00 (2006.01); B60T 8/171 (2006.01); B60T 8/172 (2006.01); B60T 13/74 (2006.01); F16D 65/18 (2006.01); H02P 23/14 (2006.01); H02P 29/60 (2016.01); F16D 66/00 (2006.01); F16D 121/24 (2012.01)
CPC H02P 29/60 (2016.02) [B60T 8/171 (2013.01); B60T 8/172 (2013.01); B60T 13/746 (2013.01); F16D 65/18 (2013.01); H02P 23/14 (2013.01); F16D 2066/001 (2013.01); F16D 2121/24 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An electronic parking brake system comprising a motor actuator operated by an electric motor, wherein the electronic parking brake system further comprises:
a motor driving circuit provided to drive the electric motor; and
a controller configured to determine a temperature of the electric motor from a temperature of a brake disc during a parking operation, determine a target current based on the determined motor temperature, and control the electric motor depending on the determined target current,
wherein the controller is configured to determine a first thermal energy to be generated during vehicle braking, determine a second thermal energy to be cooled when the braking of the vehicle is released, and determine the temperature of the brake disc based on the determined first thermal energy and the determined second thermal energy.