US 12,463,543 B2
Apparatus for estimating output current of low-voltage DC-DC converter
Changkyu Bai, Yongin-si (KR); and Juhong Min, Seongnam-si (KR)
Assigned to HL MANDO CORPORATION, Pyeongtaek-si (KR)
Filed by HL Mando Corporation, Pyeongtaek-si (KR)
Filed on Jul. 26, 2023, as Appl. No. 18/226,400.
Claims priority of application No. 10-2022-0146102 (KR), filed on Nov. 4, 2022.
Prior Publication US 2024/0162823 A1, May 16, 2024
Int. Cl. H02M 3/335 (2006.01); H02M 1/00 (2006.01)
CPC H02M 3/33573 (2021.05) [H02M 1/0009 (2021.05)] 20 Claims
OG exemplary drawing
 
1. An apparatus for estimating an output current of a low-voltage DC-DC converter, the apparatus comprising:
an input voltage meter connected with the low-voltage DC-DC converter and configured to measure an input voltage (Vin) of the low-voltage DC-DC converter;
a current transformer (CT) voltage meter connected with the low-voltage DC-DC converter and configured to measure a CT voltage (VCT) correlated with an input current of the low-voltage DC-DC converter;
an output voltage meter connected with the low-voltage DC-DC converter and configured to measure an output voltage (Vout) of the low-voltage DC-DC converter; and
an output current estimator connected with the input voltage meter, the CT voltage meter, and the output voltage meter, and configured to output an output current estimate of the low-voltage DC-DC converter by applying the measured input voltage, CT voltage, and output voltage to an estimation function of a multi-variable polynomial.