Patent ID: 9645178
Date: 2017-05-09
CPC Classifications: G01R,H02M

Claim:
1. A method for estimating an output current of a direct current to direct current (DC-DC) converter, the method comprising: correcting, by a processor, an output voltage of a current transformer (CT) sensor to be about equal to an output voltage value of a CT sensor at a pre-stored output voltage of the DC-DC converter, the current transformer (CT) sensor being applied to an input terminal of the DC-DC converter to sense current at the input terminal of the DC-DC converter; calculating, by the processor, an input current value of the DC-DC converter in a current map using the corrected output voltage of the CT sensor wherein the current map is a map that stores the relationship between the input voltage and input current of the DC-DC converter and the output voltage of the CT sensor; and calculating, by the processor, the efficiency of the DC-DC converter in an efficiency map using the input current value wherein the efficiency map is obtained by previously and experimentally measuring the output voltage depending on the input voltage of the DC-DC converter.