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Patent Agency Ranking
公开(公告)号：US11506729B2
公开(公告)日：2022-11-22
申请号：US17499172
申请日：2021-10-12
Applicant: TDK Corporation
Inventor： Hiroyuki Hirano , Makoto Takahashi , Ryoichi Menju
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.
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公开(公告)号：US11852697B2
公开(公告)日：2023-12-26
申请号：US17967452
申请日：2022-10-17
Applicant: TDK Corporation
Inventor： Hiroyuki Hirano , Makoto Takahashi , Ryoichi Menju
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.
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公开(公告)号：US11519940B2
公开(公告)日：2022-12-06
申请号：US17155527
申请日：2021-01-22
Applicant: TDK Corporation
Inventor： Hiroyuki Hirano , Makoto Takahashi , Ryoichi Menju , Teiichiro Oka
Abstract: A current sensor that is less affected by the residual magnetization is provided. A current sensor of the present invention has a magnetic circuit that is magnetized by electric current; a first magnetic field detecting element that is positioned where a magnetic field, when the electric current is present, is directed in a same direction as a magnetic field that is caused by residual magnetization of the magnetic circuit when the electric current is not present; and a second magnetic field detecting element that is positioned where a magnetic field, when the electric current is present, is directed opposite to a direction of a magnetic field that is caused by residual magnetization of the magnetic circuit when the electric current is not present.
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公开(公告)号：US11543469B2
公开(公告)日：2023-01-03
申请号：US17517341
申请日：2021-11-02
Applicant: TDK CORPORATION
Inventor： Hiroyuki Hirano , Makoto Takahashi , Ryoichi Menju
Abstract: A current sensor includes a magnetic detector and a first soft magnetic body. The magnetic detector is configured to be subjected to a magnetic flux that is to be generated when a current flows through a conductor along a first axis direction, the magnetic flux being in a second axis direction. The first soft magnetic body includes a first portion, a second portion disposed between the conductor and the first portion, and a third portion magnetically coupling the first portion and the second portion to each other. The first soft magnetic body is spaced from both of the conductor and the magnetic detector, with the first portion, the second portion, and the third portion surrounding the magnetic detector along a first plane orthogonal to the second axis direction.
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公开(公告)号：US20210263077A1
公开(公告)日：2021-08-26
申请号：US17155527
申请日：2021-01-22
Applicant: TDK Corporation
Inventor： Hiroyuki HIRANO , Makoto Takahashi , Ryoichi Menju , Teiichiro Oka
Abstract: A current sensor that is less affected by the residual magnetization is provided. A current sensor of the present invention has a magnetic circuit that is magnetized by electric current; a first magnetic field detecting element that is positioned where a magnetic field, when the electric current is present, is directed in a same direction as a magnetic field that is caused by residual magnetization of the magnetic circuit when the electric current is not present; and a second magnetic field detecting element that is positioned where a magnetic field, when the electric current is present, is directed opposite to a direction of a magnetic field that is caused by residual magnetization of the magnetic circuit when the electric current is not present.
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