-
公开(公告)号：US11994538B2
公开(公告)日：2024-05-28
申请号：US17442453
申请日：2020-03-24
申请人： LEM INTERNATIONAL SA
发明人： Arnaud Labbe , Gérard Lepine
CPC分类号： G01R15/202 , G01R19/0092
摘要： 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.
-
公开(公告)号：US11988690B2
公开(公告)日：2024-05-21
申请号：US18283160
申请日：2022-03-04
申请人： LEM International SA
发明人： Thomas Guillemin , Fabien Millet
IPC分类号： G01R33/02 , G01R15/18 , G01R15/20 , G01R33/07 , G01R33/09 , B82Y25/00 , B82Y35/00 , B82Y40/00
CPC分类号： G01R15/185 , G01R15/207 , G01R33/02 , G01R33/07 , G01R33/093 , B82Y25/00 , B82Y35/00 , B82Y40/00
摘要： A current transducer comprising a housing including a base and a cover, a magnetic circuit mounted within a cavity of the base, the magnetic circuit comprising a magnetic core and a least one coil wound around the magnetic core, and an electric circuit comprising a first circuit board mounted within the housing, the first circuit board comprising a signal processing circuit connected to the magnetic field detector and to the coil. The transducer further comprises a second circuit board comprising one or more power amplifiers mounted thereon, the second circuit board being integrated within an inner side of a metallic support substrate forming an outer layer of said cover, the metallic support substrate fixed to the housing base to cover the cavity therein with the second circuit board forming an inner side of the cover facing the first circuit board, the first and second boards interconnected electrically by electrical interconnections.
-
公开(公告)号：US11650229B2
公开(公告)日：2023-05-16
申请号：US17769139
申请日：2020-10-16
申请人： LEM INTERNATIONAL SA
发明人： Stéphan Trombert
CPC分类号： G01R15/185 , G01R33/02 , G01R33/04 , G01R33/045 , G01R33/05 , G01R33/0206
摘要： Fluxgate current transducer including a fluxgate device comprising a saturable soft magnetic core and an excitation coil, and a processing circuit comprising a control circuit and a voltage generator connected to the control circuit for generating an alternating current in the excitation coil, the voltage generator generating a voltage oscillating between a maximum positive voltage (+U) and a maximum negative voltage (−U) configured to alternatingly saturate the soft magnetic core. The signal processing circuit comprises an overload circuit portion connected to the control circuit, configured to generate overload currents through the excitation coil over time windows (Tn) after detection of the excitation coil current reaching positive and negative threshold currents (+S3, −S3) representative of saturation of the magnetic core, during at least one of a plurality of alternating voltage periods (P).
-
公开(公告)号：US11609248B2
公开(公告)日：2023-03-21
申请号：US17259055
申请日：2019-07-08
申请人： LEM INTERNATIONAL SA
发明人： Jean-François Lanson , Pascal Morel
摘要： Electrical current transducer including an insulating body, a magnetic core comprising a central passage and a magnetic circuit gap, a magnetic field detector positioned in the magnetic circuit gap, and a sheet metal leadframe conductor arrangement comprising a primary conductor for carrying the current to be measured and secondary conductors for connecting the magnetic field detector to an external circuit, the primary conductor comprising a central portion extending through the central passage of the magnetic core, lateral extension arms extending from opposite ends of the central portion, and connection ends for connection to an external conductor, the secondary conductors comprising a plurality of conductors, each conductor comprising a sensing cell connection pad substantially aligned with the central portion of the primary conductor and a connection end for connection to the external circuit, the insulating body comprising an inner overmold portion surrounding a central portion of the primary conductor and forming a core guide positioning and insulating the magnetic core with respect to the leadframe conductor arrangement. The insulating body further comprises an outer overmold portion molded over the inner overmold portion, the magnetic core, magnetic field sensor, and a central portion of the leadframe conductor arrangement.
-
公开(公告)号：US20220357366A1
公开(公告)日：2022-11-10
申请号：US17769139
申请日：2020-10-16
申请人： LEM INTERNATIONAL SA
发明人： Stéphan Trombert
摘要： Fluxgate current transducer including a fluxgate device comprising a saturable soft magnetic core and an excitation coil, and a processing circuit comprising a control circuit and a voltage generator connected to the control circuit for generating an alternating current in the excitation coil, the voltage generator generating a voltage oscillating between a maximum positive voltage (+U) and a maximum negative voltage (−U) configured to alternatingly saturate the soft magnetic core. The signal processing circuit comprises an overload circuit portion connected to the control circuit, configured to generate overload currents through the excitation coil over time windows (Tn) after detection of the excitation coil current reaching positive and negative threshold currents (+S3, −S3) representative of saturation of the magnetic core, during at least one of a plurality of alternating voltage periods (P).
-
公开(公告)号：US20220334156A1
公开(公告)日：2022-10-20
申请号：US17617807
申请日：2020-06-05
申请人： LEM INTERNATIONAL SA
发明人： Florent Balboni , Tomislav Hajak , Sylvain Barrat
摘要： A DC meter for an electrical vehicle charging station having a pair of DC power supply lines extending from a charging station controller to an electrical vehicle connector, the DC meter comprising a meter unit and a sensor unit. The meter unit comprises a user interface, a sensor interface for connection to the sensor unit, a metering interface for connection to the charging station controller, and a microprocessor configured to receive and process signals received from the sensor unit, to exchange data with the charging station controller and to receive commands from the user interface and output information to the user interface. The sensor unit is separate and connected at a point distal from the meter unit via an interconnection cable for the transmission of measurement signals.
-
公开(公告)号：US11346897B2
公开(公告)日：2022-05-31
申请号：US17440332
申请日：2020-03-13
申请人： LEM INTERNATIONAL SA
摘要： A magnetic field sensor comprises a signal conditioning IC and a magnetic field sensor IC, the magnetic field sensor IC being mounted on and connected to the signal conditioning IC. The magnetic field sensor IC comprises a semi-conductor substrate with a sensor active layer disposed an outer facing side of the magnetic field sensor opposite the signal conditioning IC. The sensor active layer is connected to conductive vias that extend through the semi-conductor substrate from said outer facing side to an underside facing the signal conditioning IC, an underside of the conductive via being electrically interconnected to a connection pad on the signal conditioning IC via a chip-on-chip interconnection comprising a conductive bead connection and a solder connection.
-
公开(公告)号：US20220163569A1
公开(公告)日：2022-05-26
申请号：US17442453
申请日：2020-03-24
申请人： LEM INTERNATIONAL SA
发明人： Arnaud Labbe , Gérard Lepine
摘要： 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.
-
公开(公告)号：US11112435B2
公开(公告)日：2021-09-07
申请号：US15770275
申请日：2016-10-14
申请人： LEM International SA
摘要： An electrical current transducer including a housing, a magnetic core comprising a central passage and a magnetic circuit gap, a magnetic field detector positioned in the magnetic circuit gap, and a leadframe conductor arrangement comprising a primary conductor for carrying the current to be measured and magnetic field detector conductors for connecting the magnetic field detector to an external circuit.
-
公开(公告)号：US20210141004A1
公开(公告)日：2021-05-13
申请号：US17259055
申请日：2019-07-08
申请人： LEM INTERNATIONAL SA
发明人： Jean-François Lanson , Pascal Morel
摘要： Electrical current transducer including an insulating body, a magnetic core comprising a central passage and a magnetic circuit gap, a magnetic field detector positioned in the magnetic circuit gap, and a sheet metal leadframe conductor arrangement comprising a primary conductor for carrying the current to be measured and secondary conductors for connecting the magnetic field detector to an external circuit, the primary conductor comprising a central portion extending through the central passage of the magnetic core, lateral extension arms extending from opposite ends of the central portion, and connection ends for connection to an external conductor, the secondary conductors comprising a plurality of conductors, each conductor comprising a sensing cell connection pad substantially aligned with the central portion of the primary conductor and a connection end for connection to the external circuit, the insulating body comprising an inner overmold portion surrounding a central portion of the primary conductor and forming a core guide positioning and insulating the magnetic core with respect to the leadframe conductor arrangement. The insulating body further comprises an outer overmold portion molded over the inner overmold portion, the magnetic core, magnetic field sensor, and a central portion of the leadframe conductor arrangement.
-
-
-
-
-
-
-
-
-
搜索结果
37 条记录 (耗时 0.022 秒)
