US 12,455,300 B2
Current measurement apparatus
Sang Min Kim, Yongin-si (KR); and Jin Qyu Seo, Yongin-si (KR)
Assigned to HYUNDAI MOBIS CO., LTD., Seoul (KR)
Filed by HYUNDAI MOBIS CO., LTD., Seoul (KR)
Filed on Jul. 25, 2023, as Appl. No. 18/215,313.
Prior Publication US 2024/0012030 A1, Jan. 11, 2024
Int. Cl. G01R 15/18 (2006.01); G01R 19/12 (2006.01); G01R 19/25 (2006.01)
CPC G01R 15/181 (2013.01) [G01R 19/12 (2013.01); G01R 19/25 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A current measurement apparatus that is configured to measure a measurement target current having a predetermined switching frequency and an on-duty, the current measurement apparatus comprising:
a current sensor configured to measure a rate of change of the measurement target current;
an integrator configured to integrate the rate of change of the measurement target current and output an estimated current amount; and
a corrector including a first correction unit that is configured to correct and output a direct current offset of the estimated current amount based on at least one of the switching frequency or the on-duty,
wherein the corrector further includes an analog-to-digital converter configured to convert the estimated current amount into a digital signal, and
wherein the first correction unit is configured to receive the digital signal converted by the analog-to-digital converter, the switching frequency, and the on-duty, calculate an output offset for each of the switching frequency and the on-duty, subtract the calculated output offset from the digital signal, and output a first correction current.