-
公开(公告)号：US20190293726A1
公开(公告)日：2019-09-26
申请号：US16436457
申请日：2019-06-10
Inventor： Kazuhiro ONAKA , Noritaka ICHINOMIYA , Shigehiro YOSHIUCHI , Kiyotaka YAMADA
Abstract: A magnetic sensor includes a first magnetoresistive element that detects a magnetic field along a first detection axis, a second magnetoresistive element that detects a magnetic field along a second detection axis inclining at an angle of 45 degrees with respect to the first detection axis, a first Hall element that detects a magnetic field along a third detection axis, and a second Hall element that detects a magnetic field along a fourth detection axis perpendicular to the third detection axis. This magnetic sensor has both characteristics of the Hall elements and characteristics of the magnetoresistive elements, and has high accuracy and a small size.
-
公开(公告)号：US20240405643A1
公开(公告)日：2024-12-05
申请号：US18697685
申请日：2022-10-05
Inventor： Kazuhiro ONAKA , Noritaka ICHINOMIYA
IPC: H02K11/215 , G01D5/16 , G03B13/36 , H02K41/035
Abstract: In a motor including a coil and a drive magnet that applies a drive magnetic field to the coil, the drive magnet has a magnetized surface aligned with a magnetization direction and facing a coil surface and a driving direction of the motor is aligned with the magnetization direction. The driving direction is a direction in which one member selected from the coil and the drive magnet is displaced with respect to the other member. The position detection system includes a magnetic sensor and a processing circuit. The magnetic sensor includes a base member, a wiring layer disposed on a base member surface as a surface of the base member, and a bias magnet that applies a bias magnetic field to the wiring layer. The magnetic sensor is arranged such that the base member surface is parallel to the magnetization direction and perpendicular to the magnetized surface.
-
公开(公告)号：US20240255591A1
公开(公告)日：2024-08-01
申请号：US18561156
申请日：2022-05-16
Inventor： Kazuhiro ONAKA , Naoki KOHARA
CPC classification number: G01R33/09 , G01R33/0206
Abstract: A magnetic sensor includes a first half-bridge circuit, a second half-bridge circuit, and a holding member. The first half-bridge circuit includes a first magnetoresistive effect element and a second magnetoresistive effect element. The second half-bridge circuit includes a third magnetoresistive effect element and a fourth magnetoresistive effect element. The first magnetoresistive effect element detects a magnetic field aligned with an X-axis. The second magnetoresistive effect element detects a magnetic field aligned with a Y-axis. The third magnetoresistive effect element detects a magnetic field aligned with a first axis. The fourth magnetoresistive effect element detects a magnetic field aligned with a second axis.
-
Patent Agency Ranking
公开(公告)号：US20240248157A1
公开(公告)日：2024-07-25
申请号：US18561565
申请日：2022-05-16
Inventor： Takafumi TSUSHIMA , Kazuhiro ONAKA
CPC classification number: G01R33/093 , H10N50/85 , H10N50/10
Abstract: A magnetic sensor includes at least one bias magnet, a first half-bridge circuit, a second half-bridge circuit, and a base member. The first half-bridge circuit includes a pair of first magnetoresistive effect elements to one of which a bias magnetic field aligned with a positive direction of an X-axis is applied and to the other of which a bias magnetic field aligned with a negative direction of the X-axis is applied. The second half-bridge circuit includes a pair of second magnetoresistive effect elements to one of which a bias magnetic field aligned with a positive direction of a Y-axis is applied and to the other of which a bias magnetic field aligned with a negative direction of the Y-axis is applied.
-
公开(公告)号：US20240125623A1
公开(公告)日：2024-04-18
申请号：US18546055
申请日：2022-02-15
Inventor： Takafumi TSUSHIMA , Kazuhiro ONAKA
IPC: G01D5/14
CPC classification number: G01D5/14
Abstract: A magnetic scale includes a magnetic scale body and an adhesive layer. The magnetic scale body includes a magnetic substance. The adhesive layer includes a hot-melt adhesive. The adhesive layer is attached to the magnetic scale body.
-
公开(公告)号：US20250007360A1
公开(公告)日：2025-01-02
申请号：US18695754
申请日：2022-09-29
Inventor： Noritaka ICHINOMIYA , Kazuhiro ONAKA
IPC: H02K11/215 , H02K5/22 , H02K15/00
Abstract: A rotary machine according to the present disclosure includes a stator, a rotor, a rotary shaft, and a magnetic sensor. The rotor rotates relative to the stator. The rotary shaft is coupled to the rotor and rotates as the rotor rotates. The magnetic sensor detects a position of the rotor. The rotor includes a plurality of magnets. The magnetic sensor is arranged to face the rotor in an axial direction that is parallel to the rotary shaft. The magnetic sensor detects the position of the rotor based on a magnetic field generated by the plurality of magnets of the rotor.
-
公开(公告)号：US20230384125A1
公开(公告)日：2023-11-30
申请号：US18249677
申请日：2021-10-26
Inventor： Kazuhiro ONAKA , Noritaka ICHINOMIYA , Naoki KOHARA , Takafumi TSUSHIMA
CPC classification number: G01D5/245 , G01R33/091
Abstract: A position detection system includes a magnetic pole block and a magnetic sensor. The magnetic pole block includes a plurality of magnetic poles arranged in a first direction. The plurality of magnetic poles are arranged such that N poles and S poles are alternately arranged as the plurality of magnetic poles in the first direction. At least one member selected from the magnetic pole block and the magnetic sensor is movable in the first direction with respect to the other member. The magnetic sensor includes a plurality of magnetoresistive effect elements and a bias magnet. The plurality of magnetoresistive effect elements are arranged side by side in the first direction. The bias magnet applies, to the plurality of magnetoresistive effect elements, a magnetic field having an orientation toward one of two opposite sides of the first direction.
-
公开(公告)号：US20220290965A1
公开(公告)日：2022-09-15
申请号：US17635624
申请日：2020-08-13
Inventor： Noritaka ICHINOMIYA , Kazuhiro ONAKA
Abstract: A position-sensing circuit includes a processing circuit. A magnet member includes a first track having a plurality of first magnetic poles and a second track having a plurality of second magnetic poles. A magnetic pole pitch between the plurality of first magnetic poles in a sensing direction is different from a magnetic pole pitch between the plurality of second magnetic poles in the sensing direction. A magnetic sensor includes a first sensor part configured to sense magnetism produced at the first track and a second sensor part configured to sense magnetism produced at the second track. The processing circuit is configured to determine, based on information on a phase of an output of the first sensor part and a phase of an output of the second sensor part, a position of the magnetic sensor with respect to the magnet member.
-
-
-
-
-
-
-
Search Results
8
records
(took 0.018 seconds)
