US 12,078,661 B2
Current transducer with magnetic field detector module
Arnaud Labbe, St. Girod (FR); Gérard Lepine, Peillonnex (FR); and David Seron, Bron (FR)
Assigned to LEM INTERNATIONAL SA, Meyrin (CH)
Appl. No. 17/426,393
Filed by LEM INTERNATIONAL SA, Meyrin (CH)
PCT Filed Jan. 27, 2020, PCT No. PCT/EP2020/051956
§ 371(c)(1), (2) Date Jul. 28, 2021,
PCT Pub. No. WO2020/157019, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 19154562 (EP), filed on Jan. 30, 2019.
Prior Publication US 2022/0099708 A1, Mar. 31, 2022
Int. Cl. G01R 15/20 (2006.01); G01R 19/00 (2006.01); H01F 27/24 (2006.01); H01F 27/28 (2006.01); H05K 1/18 (2006.01)
CPC G01R 15/202 (2013.01) [G01R 19/0092 (2013.01); H01F 27/24 (2013.01); H01F 27/28 (2013.01); H05K 1/181 (2013.01); H05K 2201/1003 (2013.01); H05K 2201/10151 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An electrical current transducer comprising
a magnetic core; and
a magnetic field detector module, the magnetic core and magnetic field detector module each forming a single unit separably mountable around a primary conductor and to a circuit board, the magnetic core having a general U shape comprising an end branch and lateral branches extending from the end branch to respective free ends, the magnetic field detector module being positioned between the lateral branches and extending across a whole width of a gap formed between the lateral branches such that the magnetic field detector module contacts opposed inner sides of said lateral branches, said inner sides arranged substantially orthogonally to the circuit board, the magnetic field detector module comprising
at least one magnetic field sensing cell,
a pair of magnetic concentrators arranged in mirror opposition forming a magnetic field gap therebetween, the at least one sensing cell being positioned inside the magnetic field gap, and
an insulating body supporting the magnetic concentrators and at least one sensing cell.