Current sensor and electric control device

    公开(公告)号:US11852697B2

    公开(公告)日:2023-12-26

    申请号:US17967452

    申请日:2022-10-17

    CPC classification number: G01R33/0076 G01R33/07 G01R33/093 G01R33/098

    Abstract: A magnetic sensor for detecting magnetism generated from a conductor in which a current flows in a first direction includes a magnetic detection unit capable of detecting the magnetism, a magnetization core, and a magnetic shield. The magnetization core includes a first core section, which is substantially parallel to the first direction, and a second core section and third core section, which are each continuous from both end portions of the first core section in a second direction that is orthogonal to the first direction. The second core section and the third core section each extend from an end portion of the first core section to follow a third direction that is orthogonal to the first direction and the second direction. The magnetic detection unit has a sensitivity direction in the second direction and is positioned in a core gap sandwiched between the vicinity of the end portion of the second core section and the vicinity of the end portion of the third core section in the third direction. The magnetic shield includes a plate-shaped shield portion positioned to overlap the core gap when viewed along the third direction.

    AUTHENTICATION USING MAGNETIC FIELD BASED ON CURRENT DRAWN BY SECURITY DEVICE

    公开(公告)号:US20230409697A1

    公开(公告)日:2023-12-21

    申请号:US17866962

    申请日:2022-07-18

    CPC classification number: G06F21/44 G01R33/09 G01R33/07

    Abstract: Systems and methods for determining authenticity of a security device of a component in an imaging device includes receiving, by the security device, an authentication challenge including one or more commands and executing, by the security device, the one or more commands in response to receiving the authentication challenge. A magnetic field profile is generated based on current drawn by the security device from a power source while the security device is executing the one or more commands, the generated magnetic field profile indicating an authentication response of the security device to the authentication challenge for use in determining authenticity of the security device.

    Devices and methods for measuring a magnetic field gradient

    公开(公告)号:US11846687B2

    公开(公告)日:2023-12-19

    申请号:US18147170

    申请日:2022-12-28

    CPC classification number: G01R33/022 G01R33/0082 G01R33/07

    Abstract: A method of determining a gradient of a magnetic field, includes the steps of: biasing a first/second magnetic sensor with a first/second biasing signal; measuring and amplifying a first/second magnetic sensor signal; measuring a temperature and/or a stress difference; adjusting at least one of: the second biasing signal, the second amplifier gain, the amplified and digitized second sensor value using a predefined function f(T) or f(T, ΔΣ) or f(ΔΣ) of the measured temperature and/or the measured differential stress before determining a difference between the first/second signal/value derived from the first/second sensor signal. A magnetic sensor device is configured for performing this method, as well as a current sensor device, and a position sensor device.

    Current sensor
    38.
    发明授权

    公开(公告)号:US11835600B2

    公开(公告)日:2023-12-05

    申请号:US17807002

    申请日:2022-06-15

    CPC classification number: G01R33/07 G01R15/202 G01R15/205 G01R33/09

    Abstract: What is proposed is a current sensor comprising a current rail and comprising a magnetic field sensor, wherein the magnetic field sensor is configured to measure a magnetic field induced by a current flowing through the current rail, wherein a first insulation layer and a second insulation layer are arranged between the current rail and the magnetic field sensor, wherein an interface between the first insulation layer and the second insulation layer is free of a contact with the current rail and/or is free of a contact with the magnetic field sensor.

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