Lem Intellectual Property Sa

Lem International Sa

Arnaud Labbe

Gérard Lepine

Damien Coutellier

Atef Lekdim

Vinh Tho Vo

Erick Pauchet

Albert Tournilhac

David Seron

Sofiane Serbouh

Dylan Cerutti

Magnetic field detector module comprising a pair of magnetic field concentrators, an airgap formed between the pair of magnetic field concentrators, a magnetic field sensing cell mounted within the airgap, a plurality of terminals for interconnecting the magnetic field sensing cell to an external circuit, and an insulating housing within which the magnetic field concentrators, magnetic field sensing cell, and the terminals are assembled. The magnetic field detector module further comprises a circuit board on which the magnetic field sensing cell is mounted such that a portion of the circuit board is inserted in the airgap, each terminal having a substantially planar shape cut out of a sheet of metal arranged substantially orthogonally to the circuit board and comprising an internal board connection portion having a pair of opposed contacts separated by a slot, each contact engaging a respective side of the circuit board.

Magnetic field detector module

A current measurement system comprising a multi-phase open loop current transducer for measuring phase currents (I, I, I) flowing in a plurality n of primary conductors of a multi-phase electrical system. The transducer comprises a housing, a magnetic core including first and second core parts and a plurality n+of magnetic field detectors mounted in the housing between the first and second core parts in which portions of the primary conductors traversing the current transducer housing are positioned. The system further comprises a non-volatile memory in which information on at least one coupling matrix (K), pre-defined in a calibration procedure, is stored.

Current measurement system

An electrical current transducer including 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 including an end branch and lateral branches extending 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. The magnetic field detector module includes at least one magnetic field sensing cell, a pair of magnetic concentrators arranged in mirror opposition forming a magnetic field gap therebetween in which the at least one sensing cell is positioned, and an insulating body supporting the magnetic concentrators and at least one sensing cell.

Current transducer with magnetic field detector module

An open loop electrical current transducer including a primary conductor bar, for carrying a current to be measured, a magnetic core having a U shape formed by an end branch and lateral branches upstanding therefrom to free ends, a magnetic circuit gap formed between inner surfaces of the lateral branches at the free ends of the lateral branches, a magnetic field detector positioned in the magnetic circuit gap, and a housing surrounding the magnetic core and a section of the primary conductor bar extending through the magnetic core and beyond the magnetic core either side thereof. The primary conductor bar includes a central portion having a width (Wc) equal to the width of a magnetic field gap (Wg) such that the central portion is clamped between said lateral branches in an interference force fit.

Current transducer with magnetic core on primary conductor bar

Current transducer

An electrical current transducer is disclosed which includes a primary conductor bar for carrying the current to be measured, a magnetic core having a magnetic circuit gap, a magnetic field sensor having a magnetic field detector positioned in the magnetic circuit gap, and an insulating housing surrounding the magnetic core and magnetic field sensor. The primary conductor bar has connection terminal ends extending outside of the housing configured for connection to an external primary conductor. The primary conductor bar has a core passage section comprising a fuse portion configured for interruption of the primary conductor if a predefined electrical current is exceeded. The core passage section has a reduced width (W) in comparison to the connection terminal ends extending outside of the housing thereby providing indents within which at least a portion of the magnetic core is positioned such that a central passage of the magnetic core has a width (W) less than the width (W) of the primary conductor connection ends.

Current transducer with integrated primary conductor bar

An electrical current transducer including a housing (), a magnetic field detector device () comprising a magnetic field detector (), and a magnetic circuit () comprising a magnetic core () with a gap () and a grounding device () mounted on the magnetic core. The magnetic field detector is positioned in the gap (). The grounding device comprises at least two parts (), a first part () mounted against a first lateral side () of the magnetic core and a second part () mounted against a second lateral side () of the magnetic core opposite the first lateral side. At least one of the first and second parts comprises clamp fixing extensions () 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. The least one of the first and second parts comprising electrically conductive material, said part comprising at least one contact terminal () being adapted to provide an electrical grounding connection for grounding the magnetic core.

Electrical current transducer with grounding device

Battery current sensor comprising a battery post connection clamp portion () comprising a tubular clamping body configured to be clamped around a terminal post () of a battery (), and a current sensing portion () comprising a magnetic circuit () and a magnetic field sensor (). The magnetic circuit comprises a magnetic core surrounding the tubular clamping body ().

Battery current sensor having a magnetic field sensor

An electrical current transducer comprising a housing, at least one magnetic core comprising an air gap and defining a central passage configured to receive a primary conductor carrying a primary current to be measured through the central passage, a magnetic field detector positioned at least partially in the air gap, and a grounding element. A lateral surface of the magnetic core is positioned against the grounding element without direct fixed attachment between the magnetic core and the grounding element, and the grounding element overlaps the magnetic core to an extent configured to ensure that a capacitive coupling (C) between the magnetic core and the grounding element is greater than a capacitive coupling (C) between the magnetic core and the magnetic field detector.

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St-Girod, France

Arnaud Labbe