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公开(公告)号：US20240361362A1
公开(公告)日：2024-10-31
申请号：US18767125
申请日：2024-07-09
Applicant: Alps Alpine Co., Ltd.
Inventor： Manabu TAMURA , Chiaki UEDA
CPC classification number: G01R19/0092 , G01R1/07 , G01R1/18
Abstract: A current sensor includes units each of which has a bus bar through which current flows, a magnetic sensor facing one of plate surfaces of the bus bar, a shield facing the other plate surface. The units have a large-current unit and a small-current unit. A first distance between the bus bar and the magnetic sensor in a normal direction of the plate surfaces of the bus bar is the same as a distance L1A of the large-current unit and a distance L1B of the small-current unit. Since, as for a second distance between the bus bar and a base of the shield, a distance L2A of the large-current unit is larger than a distance L2B of the small-current unit, a measurement range of the large-current unit is widened and a measurement error due to magnetic saturation of the shield is suppressed.
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公开(公告)号：US20240110952A1
公开(公告)日：2024-04-04
申请号：US18539407
申请日：2023-12-14
Applicant: Alps Alpine Co., Ltd.
Inventor： Manabu TAMURA , Keisuke NAKAYAMA , Takahiro TAOKA
CPC classification number: G01R15/205 , G01R15/207 , G01R19/0092
Abstract: A current sensor capable of efficiently cooling a busbar by using a cooling device includes a busbar, a shield disposed to face the busbar, a magnetic sensor disposed between the shield and the busbar, and an enclosure that integrally encases part of the busbar, the shield, and the magnetic sensor. When a side on which the busbar is disposed in the X-axis direction in which the busbar, the magnetic sensor, and the shield are arranged is defined as an X1 side, the busbar is disposed on the X1 side from the center line of the enclosure, and at least the X1 side of the enclosure is disposed to face the cooling device.
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公开(公告)号：US20250044325A1
公开(公告)日：2025-02-06
申请号：US18921175
申请日：2024-10-21
Applicant: Alps Alpine Co., Ltd.
Inventor： Manabu TAMURA
Abstract: A current sensor has: a bus bar extending in a first direction; a magnetic shield having a portion that faces the bus bar along a third direction; a magnetic sensor facing the bus bar along the third direction on an opposite side of the bus bar to a side on which the magnetic shield is placed; and a case molded integrally with part of the bus bar. The magnetic shield has: a U-shaped portion that has a bottom wall including a portion that faces the bus bar along the third direction and also has two side walls, facing each other in the second direction, that is erected in the third direction from ends of the bottom wall in a second direction; an attachment portion that is adjoined to the U-shaped portion and is fixed to the case; and a link portion that links the U-shaped portion and attachment portion together.
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公开(公告)号：US20230092098A1
公开(公告)日：2023-03-23
申请号：US18061337
申请日：2022-12-02
Applicant: Alps Alpine Co., Ltd.
Inventor： Manabu TAMURA , Minoru ABE
Abstract: A current detection device includes a plurality of current detection units arranged in the current detection device. Each of the current detection units includes a bus bar that enables a current to be measured to flow therethrough, a magnetic sensor disposed at a position facing the bus bar, and a pair of shields disposed so as to sandwich the bus bar and the magnetic sensor in a facing direction in which the bus bar and the magnetic sensor face each other. The bus bars of the plurality of current detection units extend so as to be aligned to one another and, as viewed in the facing direction, the positions of the shield and the magnetic sensor of each of the current detection units in an extension direction of the bus bars differ from the positions of the shield and the magnetic sensor of the adjacent current detection unit.
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公开(公告)号：US20240248121A1
公开(公告)日：2024-07-25
申请号：US18535092
申请日：2023-12-11
Applicant: Alps Alpine Co., Ltd.
Inventor： Yuu KUMAGAI , Manabu TAMURA , Hideaki TAKANO
IPC: G01R15/20
CPC classification number: G01R15/207
Abstract: A current sensor has a bus bar through which a current under measurement flows, a magnetism sensing portion placed so as to face the bus bar in an X direction, and a chassis that incorporates the magnetism sensing portion and part of the bus bar. In a Y direction orthogonal to the X direction, the bus bar has a first connection end protruding from a Y1 side of the chassis and a second connection end protruding from a Y2 side of the chassis. The first connection end and second connection end are at different positions in the X direction when viewed from a Z direction orthogonal to the X direction and Y direction. An opposing portion, facing the magnetism sensing portion, of the bus bar crosses the Y direction when viewed from the Z direction.
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Patent Agency Ranking
公开(公告)号：US20230158837A1
公开(公告)日：2023-05-25
申请号：US18159350
申请日：2023-01-25
Applicant: Alps Alpine Co., Ltd.
Inventor： Yuki IMAI , Tokuo NAKAMURA , Takafumi NOGUCHI , Hiroyuki TOBARI , Shinya ICHISE , Ryosuke SUZUKI , Rie KUROSAWA , Heishiro FUDO , Eiji SHINOHARA , Manabu TAMURA , Nobuhiko SUEMATSU
IPC: B60C11/24
CPC classification number: B60C11/243
Abstract: A tire wear measuring device that detects wear of a tire based on a magnetic field from a magnetic object embedded in the tire includes magnetic sensors and a battery. The battery is capable of transmitting the magnetic field from the magnetic object, and has an outer edge from which the magnetic field from the magnetic object is emitted as an emission magnetic field. Each of the magnetic sensors is disposed in a position where the emission magnetic field is detectable by the sensor.
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公开(公告)号：US20250147076A1
公开(公告)日：2025-05-08
申请号：US19013020
申请日：2025-01-08
Applicant: Alps Alpine Co., Ltd.
Inventor： Keisuke NAKAYAMA , Hirofumi OKUMURA , Manabu TAMURA , Hideaki TAKANO
IPC: G01R15/20
Abstract: A current sensor includes busbars through which a current to be measured flows, magnetic detectors capable of detecting a magnetic field generated when the current to be measured flows through the busbars, a storage space storing the magnetic detectors, and a housing with which part of the busbars is integrated. Ends of the busbars are connected to an external first unit including a cooling device, and other ends of the busbars are connected to an external second unit whose temperature becomes higher than that of the first unit when the current to be measured flows. In the current sensor, which is capable of measuring a current value of the current to be measured from a result of the detection performed by the magnetic detectors, the housing has first vents penetrating from the inside of the storage space to the outside on a side facing the first unit.
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公开(公告)号：US20230111157A1
公开(公告)日：2023-04-13
申请号：US18081489
申请日：2022-12-14
Applicant: Alps Alpine Co., Ltd.
Inventor： Takahiro TAOKA , Chiaki UEDA , Manabu TAMURA
IPC: G01R15/20
Abstract: A current sensor includes a magnetic sensor configured to detect a magnetic field generated by a current to be measured flowing through a current path and a shielding member including a first shield, a second shield, and a third shield disposed away from each other. The first shield is disposed on an opposite side of the current path from the magnetic sensor in a first direction in which the magnetic sensor and the current path oppose each other and includes a first opposing surface opposing the current path. The second shield includes a second opposing surface along the first direction. The third shield includes a third opposing surface along the first direction. The second shield and the third shield are disposed such that the second opposing surface and the third opposing surface oppose each other, with the magnetic sensor and the current path sandwiched therebetween.
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公开(公告)号：US20230034792A1
公开(公告)日：2023-02-02
申请号：US17964464
申请日：2022-10-12
Applicant: Alps Alpine Co., Ltd.
Inventor： Manabu TAMURA , Mitsuo ARATONO
IPC: G01R15/20
Abstract: A current sensor has: a magnetism detection unit that can detect a component, in a first direction, of a magnetic field generated when a current flows in a current path; a shield member that can block an external magnetic field; a circuit board on which the magnetism detection unit is mounted; and a fixing member, composed of a magnetic material, that fixes the shield member to the circuit board. The first direction is parallel to the front surface of the circuit board. The shield member has two opposing plates placed so that their plate surfaces face each other in the first direction. The magnetism detection unit is placed by being interposed between the two opposing plates in the first direction. The fixing member extends toward both sides of the magnetism detection unit in the first direction when viewed along the normal of the front surface of the circuit board.
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公开(公告)号：US20230032086A1
公开(公告)日：2023-02-02
申请号：US17962969
申请日：2022-10-10
Applicant: Alps Alpine Co., Ltd.
Inventor： Keisuke NAKAYAMA , Takahiro TAOKA , Manabu TAMURA
Abstract: A current sensor according to the present invention includes a bus bar through which a measuring current flows; a nut with which the bus bar and an external terminal are brought into contact with and fastened to each other; a magnetic sensor capable of detecting a magnetic field generated when a current flows through the bus bar; a case member having a housing area in which the magnetic sensor is allowed to be housed, the case member sealing the bus bar and the nut inside; and a cover member provided over the housing area. The case member has an open part in which a portion of the nut is exposed. The open part is covered by an insulative protective member. Therefore, shavings generated when a bolt for fastening an external terminal is screwed into the nut are prevented from dropping to the outside of the current sensor.
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