-
公开(公告)号：US11353526B2
公开(公告)日：2022-06-07
申请号：US16750124
申请日：2020-01-23
Applicant: TDK Corporation
Inventor： Yosuke Antoku , Hiroyuki Hirano , Teiichiro Oka
Abstract: A rotational angle detection device includes a magnet with n pole pairs (where n≥3) provided to be integrally rotatable with a rotating body; magnetic detection parts including first and second magnetic detection parts; a corrected signal generation part generating first and second corrected signals; and a rotational angle detection part detecting the rotational angle of the rotating body based on the first and second corrected signals. The waveform of the first and second detection signals have a phase difference of 90° from each other. The corrected signal generation part adds the first sensor signals and adds the second sensor signals. The region at the perimeter of the magnet includes first through nth regions, and at least two of the first and second magnetic sensor parts are positioned in different regions from each other among the first through nth regions.
-
公开(公告)号：US11099033B2
公开(公告)日：2021-08-24
申请号：US16546455
申请日：2019-08-21
Applicant: TDK CORPORATION
Inventor： Hiroyuki Hirano , Teiichiro Oka , Yosuke Antoku
Abstract: A position detection system includes a first magnet, a first soft ferromagnetic member, and a magnetic detector. The first magnet is magnetized in a first direction and generates a first magnetic field including a first magnetic line. The first soft ferromagnetic member is rectilinearly movable along a second direction and includes a first outer edge having a first outer edge part remote from the first magnet by a first distance in a third direction and a second outer edge part remote from the first magnet by a second distance in the third direction. The first and second outer edge parts are disposed at different positions in the second direction. The magnetic detector is kept at a predetermined constant position relative to the first magnet. The first magnetic line passes through the magnetic detector in the first direction when the first soft ferromagnetic member is at rest.
-
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.
-
公开(公告)号：US11525661B2
公开(公告)日：2022-12-13
申请号：US16744630
申请日：2020-01-16
Applicant: TDK CORPORATION
Inventor： Hiroyuki Hirano , Teiichiro Oka , Seiji Fukuoka
Abstract: A position detection apparatus includes a magnetic unit and a sensor. The magnetic unit includes a magnetic member and a retainer. The magnetic member includes a magnet and a first magnetic yoke. The magnet extends in an axial direction and has a cross-section orthogonal to the axial direction, and a first maximum outer diameter in a radial direction orthogonal to the axial direction. The cross-section has a substantially constant area in the axial direction. The first magnetic yoke is disposed adjacent to the magnet in the axial direction and has a second maximum outer diameter in the radial direction. The second maximum outer diameter is greater than the first maximum outer diameter. The retainer extends in the axial direction and retains the magnetic member. The sensor detects a magnetic field that changes in association with a movement of the magnetic unit along the axial direction.
-
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.
-
Patent Agency Ranking
公开(公告)号：US20170122777A1
公开(公告)日：2017-05-04
申请号：US15317483
申请日：2015-01-28
Applicant: TDK Corporation
Inventor： Hiroyuki Hirano , Seiji Fukuoka , Keiji Suzuki , Takahiro Moriya , Kaoru Narita
IPC: G01D5/14
Abstract: A magnetic position detection device that can detect position even if there is only one object magnet. A magnetic position detection device includes a bias magnet, a magnetic detection element, an object magnet, and a mobile object. Opposite poles of the bias magnet and of the object magnet face each other. The magnetic detection element is disposed between pole surfaces of the bias magnet and of the object magnet. The magnetic detection element is fixed to the bias magnet and has a fixed positional relationship to the bias magnet. The orientation of the magnetic field at the magnetic detection element changes in accordance with the position of the object magnet. The magnetic detection element detects the orientation of the magnetic field applied to the magnetic detection element.
-
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.
-
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.
-
公开(公告)号：US10794967B2
公开(公告)日：2020-10-06
申请号：US16221725
申请日：2018-12-17
Applicant: TDK Corporation
Inventor： Teiichiro Oka , Hiroyuki Hirano , Mikio Sumiyoshi , Makoto Takahashi
Abstract: A sensor intermediate part is provided with a physical quantity detection element that has a power source terminal, a ground terminal and an output terminal that outputs a desired output signal, where the physical quantity detection element is capable of adjusting properties of the output signal; a high-capacitance capacitor, which has at least a first terminal and a second terminal, and a jumper wire, one end of which is conducted to either the power source terminal or the second terminal and the other end of which is not conducted. The first terminal is conducted to the ground terminal, and the power source terminal and the second terminal are configured to be electrically connectable by the jumper wire.
-
公开(公告)号：US11125785B2
公开(公告)日：2021-09-21
申请号：US16224937
申请日：2018-12-19
Applicant: TDK Corporation
Inventor： Teiichiro Oka , Hiroyuki Hirano , Mikio Sumiyoshi , Makoto Takahashi
IPC: G01R19/165 , G01K7/42 , G01K7/16 , G05F1/10 , G01K7/01 , H01M10/48 , G01K7/36 , G01R19/32 , G01R15/20
Abstract: A sensor is provided with a magnetic detection element that can output an output voltage within a predetermined voltage range according to a magnetic field intensity, an output voltage fixing part that can fix a voltage value of the output voltage to a voltage value outside the voltage range, and a drive voltage output part that can output a drive voltage for driving the output voltage fixing part. The drive voltage fixing part outputs the drive voltage to the output voltage fixing part when the ambient temperature of the drive voltage output part exceeds a predetermined threshold, and when triggered by input of the drive voltage, the output voltage fixing part fixes the voltage value of the output voltage to a voltage value outside the voltage range.
-
-
-
-
-
-
-
-
-
Search Results
11
records
(took 0.012 seconds)
