US 12,451,828 B2
Motor position detection device
Kun Min Lee, Seoul (KR)
Assigned to LG INNOTEK CO., LTD., Seoul (KR)
Appl. No. 18/269,874
Filed by LG INNOTEK CO., LTD., Seoul (KR)
PCT Filed Nov. 16, 2021, PCT No. PCT/KR2021/016768
§ 371(c)(1), (2) Date Jun. 27, 2023,
PCT Pub. No. WO2022/145721, PCT Pub. Date Jul. 7, 2022.
Claims priority of application No. 10-2020-0184500 (KR), filed on Dec. 28, 2020.
Prior Publication US 2024/0063743 A1, Feb. 22, 2024
Int. Cl. H02P 25/086 (2016.01); F16H 59/08 (2006.01); G01D 5/14 (2006.01); G01D 5/16 (2006.01); G01D 18/00 (2006.01); H02K 11/215 (2016.01)
CPC H02P 25/086 (2013.01) [F16H 59/08 (2013.01); G01D 5/145 (2013.01); G01D 5/16 (2013.01); G01D 18/00 (2013.01); H02K 11/215 (2016.01)] 6 Claims
OG exemplary drawing
 
1. A motor position detection device comprising:
a rotor surrounding a rotation shaft of a motor;
a substrate disposed to face the rotor;
a Hall sensor disposed on one surface of the substrate to sense a rotation of the rotor;
an MR sensor disposed on the other surface of the substrate to sense the rotation of the rotor;
a rotation speed determination unit receiving a first signal from the MR sensor and determining a rotation speed of the motor;
a position determination unit receiving a rotation speed signal of the motor from the rotation speed determination unit, receiving a second signal from the Hall sensor to determine a rotational position of the motor, and generating a motor integrated position using the rotation speed signal of the motor and the rotational position of the motor; and
a control unit for outputting a control signal to the motor using the motor integrated position received from the position determination unit,
wherein the control unit diagnoses a failure based on whether the rotation speed of the motor calculated from the second signal and the rotation speed of the motor determined from the first signal are within a normal range,
wherein the control unit controls motor driving by comparing the integrated motor position determined using the rotational position of the motor and the rotation speed of the motor in the position determining unit with a shift command of a driver,
wherein the Hall sensor and the MR sensor are disposed so as not to be overlapped with each other on the substrate,
wherein one surface of the substrate faces the rotor, and
wherein the distance between the rotor and the Hall sensor is smaller than the distance between the rotor and the MR sensor.