US 11,686,745 B2
Rogowski current sensor which is fast and immune to voltage drifts
Lionel Cima, Moissy-Cramayel (FR)
Assigned to SAFRAN ELECTRICAL & POWER, Blagnac (FR)
Appl. No. 17/995,137
Filed by SAFRAN ELECTRICAL & POWER, Blagnac (FR)
PCT Filed Mar. 24, 2021, PCT No. PCT/HR2021/050505
§ 371(c)(1), (2) Date Sep. 30, 2022,
PCT Pub. No. WO2021/198590, PCT Pub. Date Oct. 7, 2021.
Claims priority of application No. 2003329 (FR), filed on Apr. 2, 2020.
Prior Publication US 2023/0136151 A1, May 4, 2023
Int. Cl. G01R 15/18 (2006.01)
CPC G01R 15/181 (2013.01) 10 Claims
OG exemplary drawing
 
1. An electrical circuit for measuring a current flowing in a conductor comprising:
2×N coils, N being an integer greater than or equal to 2, connected in series together; and
a common mode filtering element associated with each of the 2×N coils, each filtering element being placed in parallel with the associated coil and being able to accomplish common mode filtering of the 2×N coils,
a core of the 2×N coils having a relative permeability less than 10, and among the 2×N coils, N coils being wound in a direction opposite to the winding direction of the other N coils.