US 12,292,459 B2
Current sensors employing Rogowski coils and methods of using same
Shreyas Bhalchandra Kulkarni, Atlanta, GA (US); and Deepakraj M Divan, Atlanta, GA (US)
Assigned to Georgia Tech Research Corporation, Atlanta, GA (US)
Appl. No. 17/597,902
Filed by Georgia Tech Research Corporation, Atlanta, GA (US)
PCT Filed Jul. 29, 2020, PCT No. PCT/US2020/044007
§ 371(c)(1), (2) Date Jan. 28, 2022,
PCT Pub. No. WO2021/021889, PCT Pub. Date Feb. 4, 2021.
Claims priority of provisional application 62/879,700, filed on Jul. 29, 2019.
Prior Publication US 2022/0252642 A1, Aug. 11, 2022
Int. Cl. G01R 15/18 (2006.01); G01R 19/00 (2006.01)
CPC G01R 15/181 (2013.01) [G01R 19/0092 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A current sensor comprising:
a printed circuit board having an aperture configured to receive a conductor carrying an alternating electric current to be measured;
a Rogowski coil positioned on the printed circuit board along a perimeter of the aperture; and
a controller in electrical communication with the Rogowski coil and configured to generate an output signal indicative of the alternating electric current;
wherein the current sensor is configured to;
measure the alternating electric current relative to a full scale at a resolution of 1000:1 and at an accuracy within 1%; and
receive a signal from the Rogowski coil and amplify the signal by a predetermined variable gain.