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    Closed-loop current transducer
    1.
    发明授权
    Closed-loop current transducer 有权

    公开(公告)号：US10989740B2

    公开(公告)日：2021-04-27

    申请号：US16340623

    申请日：2017-10-06

    Applicant: LEM INTELLECTUAL PROPERTY SA

    Inventor： Diego Neftali Gutierrez Hernandez ,  Steve Mouchet ,  Steve Moureaux

    IPC: G01R15/18 ,  G01R15/20 ,  G01R19/00 ,  H01F27/32 ,  G01R33/00

    Abstract: A closed-loop current transducer comprising a magnetic circuit core made of a material with a low magnetic reluctance to conduct magnetic flux and concentrate a magnetic field, a magnetic field detector positioned in a magnetic circuit gap of the magnetic circuit core, and a compensation coil assembly comprising a compensation coil and a compensation coil support comprising a coil support bobbin, the compensation coil being wound around the coil support bobbin. The magnetic circuit comprises a first longitudinal branch, a second longitudinal branch, and first and second end branches interconnecting the first and second longitudinal branches such that the branches surround a central opening configured to receive one or more primary conductors therethrough, the magnetic circuit being formed of first and second parts assembled together from opposed ends of the compensation coil support.

    Electrical current transducer with wound magnetic core
    9.
    发明授权
    Electrical current transducer with wound magnetic core 有权

    公开(公告)号：US09817037B2

    公开(公告)日：2017-11-14

    申请号：US14649906

    申请日：2013-12-04

    Applicant: LEM INTELLECTUAL PROPERTY SA

    Inventor： Steve Mouchet

    IPC: G01R15/20 ,  H01F38/30 ,  H01F41/02 ,  G01R19/00

    CPC classification number: G01R15/207 ,  G01R19/0092 ,  H01F38/30 ,  H01F41/0213

    Abstract: Electrical current transducer including a housing (5), a magnetic field detector device (3) comprising a magnetic field sensing element (11), and a magnetic circuit comprising a magnetic core (4) with a gap (6) and a bridging device (8) mounted on the magnetic core and spanning across the gap. The bridging device comprises a gap-width setting portion (26) made of a non-magnetic material inserted in the gap configured to determine a minimum width of the gap. The bridging device comprises at least two parts (8a, 8b), a first part mounted against a first lateral side (14a) of the magnetic core and a second part mounted (8b) mounted against a second lateral side (14b) of the magnetic core opposite the first lateral side, at least one of the first and second parts comprising fixing extensions (30) cooperating with the other of the first and second parts configured for clamping together the first and second parts around a portion of the magnetic core comprising the gap.

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