JP7151105B2 - 磁石構造体、回転角度検出器、及び電動パワーステアリング装置 - Google Patents
磁石構造体、回転角度検出器、及び電動パワーステアリング装置 Download PDFInfo
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- JP7151105B2 JP7151105B2 JP2018042168A JP2018042168A JP7151105B2 JP 7151105 B2 JP7151105 B2 JP 7151105B2 JP 2018042168 A JP2018042168 A JP 2018042168A JP 2018042168 A JP2018042168 A JP 2018042168A JP 7151105 B2 JP7151105 B2 JP 7151105B2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
- B62D5/0457—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such
- B62D5/0481—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such monitoring the steering system, e.g. failures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/16—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying resistance
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0205—Magnetic circuits with PM in general
- H01F7/0221—Mounting means for PM, supporting, coating, encapsulating PM
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0273—Magnetic circuits with PM for magnetic field generation
- H01F7/0294—Detection, inspection, magnetic treatment
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
- G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/06—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder
- H01F1/08—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
- H01F1/083—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together in a bonding agent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/10—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
- H01F1/11—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
- H01F1/113—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles in a bonding agent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F10/00—Thin magnetic films, e.g. of one-domain structure
- H01F10/32—Spin-exchange-coupled multilayers, e.g. nanostructured superlattices
- H01F10/324—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer
- H01F10/3254—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer the spacer being semiconducting or insulating, e.g. for spin tunnel junction [STJ]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F10/00—Thin magnetic films, e.g. of one-domain structure
- H01F10/32—Spin-exchange-coupled multilayers, e.g. nanostructured superlattices
- H01F10/324—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer
- H01F10/3286—Spin-exchange coupled multilayers having at least one layer with perpendicular magnetic anisotropy
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Steering Mechanism (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Description
Claims (6)
- 磁気抵抗効果素子用の磁石構造体であって、
前記磁気抵抗効果素子に対向する第1の主面及び前記第1の主面とは反対側の第2の主面を有する磁石成型体と、
前記磁石成型体を支持する支持部と、を備え、
前記第1の主面及び前記第2の主面はそれぞれ円形であって、
前記磁石成型体は、射出成型によるゲート跡を含むゲート部を前記第2の主面に有し、
前記第2の主面側から見て、前記ゲート部は前記第2の主面の中心と重なる位置に設けられ、
前記第1の主面は平坦に形成されていて、
前記支持部は、一端側において前記磁石成型体の側面を支持する筒状部材であって、
前記筒状部材の両端は開口していて、
前記磁石成型体の前記第1の主面は、前記支持部の前記一端側に配置され、
前記第2の主面は、前記支持部の前記一端側とは逆の他端側において、前記他端よりも前記一端側に配置され、
前記磁石構造体は、前記他端が回転シャフトに取り付けられ、
前記磁石成型体の前記第2の主面、前記筒状部材の内周面、及び、前記回転シャフトによって閉空間が形成される、磁石構造体。 - 前記支持部は、前記磁石成型体よりも外径が小さく、前記第2の主面側に取り付けられ、前記第2の主面に交差する方向に延びる筒状のシャフトであり、
前記第2の主面側から見て、前記ゲート部は前記シャフトの内側に位置する、請求項1に記載の磁石構造体。 - 請求項1または2に記載の磁石構造体と、
前記磁石構造体の前記第1の主面に対向して配置される磁気抵抗効果素子と、を備える、回転角度検出器。 - 前記磁気抵抗効果素子の磁気抵抗比は90%以上である、請求項3に記載の回転角度検出器。
- 前記磁気抵抗効果素子は、トンネル磁気抵抗効果素子である、請求項3又は4に記載の回転角度検出器。
- 請求項3~5の何れか一項に記載の回転角度検出器を備える、電動パワーステアリング装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018042168A JP7151105B2 (ja) | 2018-03-08 | 2018-03-08 | 磁石構造体、回転角度検出器、及び電動パワーステアリング装置 |
CN201811325041.2A CN110243279A (zh) | 2018-03-08 | 2018-11-08 | 磁铁结构体、旋转角度检测器及电动动力转向装置 |
US16/185,263 US11101717B2 (en) | 2018-03-08 | 2018-11-09 | Magnet structure, rotational angle detector, and electric power steering device |
DE102018128381.4A DE102018128381A1 (de) | 2018-03-08 | 2018-11-13 | Magnetstruktur, drehwinkeldetektor und elektrische servolenkvorrichtung |
US17/383,180 US11616421B2 (en) | 2018-03-08 | 2021-07-22 | Magnet structure, rotational angle detector, and electric power steering device |
Applications Claiming Priority (1)
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JP2018042168A JP7151105B2 (ja) | 2018-03-08 | 2018-03-08 | 磁石構造体、回転角度検出器、及び電動パワーステアリング装置 |
Publications (2)
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JP2019158410A JP2019158410A (ja) | 2019-09-19 |
JP7151105B2 true JP7151105B2 (ja) | 2022-10-12 |
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US (2) | US11101717B2 (ja) |
JP (1) | JP7151105B2 (ja) |
CN (1) | CN110243279A (ja) |
DE (1) | DE102018128381A1 (ja) |
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JP7272289B2 (ja) * | 2020-01-23 | 2023-05-12 | 株式会社デンソー | 磁石ホルダ |
US11824403B2 (en) * | 2020-04-03 | 2023-11-21 | North Carolina State University | Machines utilizing heavy rare earth free permanent magnets |
JP7179911B1 (ja) * | 2021-05-19 | 2022-11-29 | 株式会社ダイドー電子 | 磁石ユニット及びその製造方法 |
DE102021205297A1 (de) | 2021-05-25 | 2022-12-01 | Robert Bosch Gesellschaft mit beschränkter Haftung | Rotor für eine elektrische Maschine, eine elektrische Maschine, sowie Verfahren zum Herstellen eines solchen Rotors |
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JP5672507B2 (ja) * | 2012-07-09 | 2015-02-18 | 株式会社デンソー | 回転電機 |
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JP6763164B2 (ja) * | 2016-03-22 | 2020-09-30 | Tdk株式会社 | 磁石構造体及び回転角度検出器 |
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2018
- 2018-03-08 JP JP2018042168A patent/JP7151105B2/ja active Active
- 2018-11-08 CN CN201811325041.2A patent/CN110243279A/zh active Pending
- 2018-11-09 US US16/185,263 patent/US11101717B2/en active Active
- 2018-11-13 DE DE102018128381.4A patent/DE102018128381A1/de active Pending
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2021
- 2021-07-22 US US17/383,180 patent/US11616421B2/en active Active
Patent Citations (4)
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JP2013148457A (ja) | 2012-01-19 | 2013-08-01 | Nippon Seiki Co Ltd | プラスチックマグネットロータおよびそのプラスチックマグネットロータを用いた回転角度検出装置 |
JP2016153765A (ja) | 2015-02-20 | 2016-08-25 | Tdk株式会社 | 磁石構造体及び回転角度検出器 |
JP2016153766A (ja) | 2015-02-20 | 2016-08-25 | Tdk株式会社 | 磁石構造体及び回転角度検出器 |
JP2017009312A (ja) | 2015-06-17 | 2017-01-12 | 株式会社ジェイテクト | 回転角センサ、それを備えたモータ装置および回転角センサの製造方法 |
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US20210351669A1 (en) | 2021-11-11 |
JP2019158410A (ja) | 2019-09-19 |
US11616421B2 (en) | 2023-03-28 |
CN110243279A (zh) | 2019-09-17 |
US20190280568A1 (en) | 2019-09-12 |
DE102018128381A1 (de) | 2019-09-12 |
US11101717B2 (en) | 2021-08-24 |
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