JP2018182161A - 磁石、磁石構造体、及び、回転角度検出器 - Google Patents
磁石、磁石構造体、及び、回転角度検出器 Download PDFInfo
- Publication number
- JP2018182161A JP2018182161A JP2017082240A JP2017082240A JP2018182161A JP 2018182161 A JP2018182161 A JP 2018182161A JP 2017082240 A JP2017082240 A JP 2017082240A JP 2017082240 A JP2017082240 A JP 2017082240A JP 2018182161 A JP2018182161 A JP 2018182161A
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- axis
- magnetic
- magnetic field
- plane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- 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
- H01F7/0289—Transducers, loudspeakers, moving coil arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0231—Magnetic circuits with PM for power or force generation
- H01F7/0252—PM holding devices
- H01F7/0257—Lifting, pick-up magnetic objects
-
- 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
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D15/00—Steering not otherwise provided for
- B62D15/02—Steering position indicators ; Steering position determination; Steering aids
- B62D15/021—Determination of steering angle
- B62D15/0215—Determination of steering angle by measuring on the steering column
-
- 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
-
- 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
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
- H01F1/0578—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together bonded together
-
- 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
Abstract
Description
このような磁石は、当該面において磁気センサの位置がずれても高い精度を保ちやすい。
(第1実施形態)
図1は、本発明の第1実施形態にかかる磁石4を有する磁石構造体10の斜視図である。本実施形態の磁石構造体10は、磁石4と、筒状の磁石保持体2とを備える。図2は、第一実施形態に係る磁石4及び磁石保持体2の中心軸となる軸Cを含む断面図である。
このような磁石は、磁石4の成形時に実質的に磁界を印加させず、成形後の磁石に磁界を印加して着磁することにより、得ることができる。
樹脂バインダーの例は、熱硬化性樹脂の硬化物又は熱可塑性樹脂である。硬化性樹脂の例は、エポキシ樹脂、フェノール樹脂である。熱可塑性樹脂の例は、ナイロン(たとえば、PA12、PA6、PA66)等のポリアミド;ポリフェニレンサルファイドである。磁石4は、1種類の樹脂を単独で含んでいてもよく、2種類以上の樹脂を含んでいてもよい。
磁石4と磁石保持体2とは接着剤で固定されていてもよい。例えば、磁石保持体2の外で成形(圧縮成型及び押出成型等等)して得た、又は、磁石原体からの切り出しにより得た磁石4を、接着剤等で磁石保持体2内に固定することができる。
続いて、図4を参照して、第一実施形態の磁石構造体10を用いた回転角度検出器20の1例について説明する。回転角度検出器20は、磁石構造体10、及び、磁界の向きを検出する磁気センサ12を備え、自動車のステアリング軸14のC軸周りの回転Rの回転角度を測定する。
図5は本発明の第二実施形態に係る磁石4及び磁石構造体10の軸を含む断面図である。第二実施形態が第一実施形態と異なる第1の点は、磁石保持体2が、細管部2a、太管部2b、及び、拡径部2cを有する円筒であり、磁石保持体2の外径及び内径が軸方向に沿って変化する点である。また、第2の点は、これに対応して、磁石4は、細径部4a、及び、太径部4bを有し、磁石4の形状は、外径が軸方向に沿って変化する円柱となっている点である。
図6は本発明の第三実施形態に係る磁石構造体10の中心軸である軸Cを含む断面図である。
磁石の形態は、円柱又は円筒であれば上記実施形態の形状以外の形状でもよい。例えば、磁石の円柱又は円筒は、第二実施形態(図5参照)のように軸方向に沿って外径が変化してもよい。例えば、変化の仕方としては、図5のように外径が軸方向の途中でステップ状に変化する段付き形状の他に、外径が軸方向の途中でテーパー状に変化するテーバー部を途中に有する形状、軸方向の全体に亘って外径が変化するテーパー形状がある。
Nd2Fe14B磁石粉とナイロンPA12とからなるボンド磁石に関し、図7の(a)のように磁石が円柱形状であって磁化の向きが柱の軸(Z軸)に垂直(X方向)な場合(磁石Aと呼ぶ)と、図8の(a)のように磁石が正方形柱形状であって磁化の向きが柱の軸(Z軸)に垂直かつ一の辺から対向する辺に向かう場合(磁石Bと呼ぶ)とで、磁石の上面(端面)からC軸方向の距離Gapが2mm離れた平面Pの各点における、軸Cと交わる点P1の面内磁界の向きに対する傾きの大きさを、それぞれ図7の(b)及び図8の(b)に示す。なお、図7の(a)の円柱形状の磁石の直径(XY面)は13mmで、厚み(Z方向)は2mmである。また、図8の(a)の正方形柱形状の磁石の辺(X方向、及び、Y方向)の長さは11.5mmであり、厚み(Z方向)は2mmである。磁界の傾きの大きさは、シミュレーションにより計算した。
Claims (7)
- 円柱又は円筒形状を有し、多数の磁性結晶粒を含有する磁石であって、前記磁石の磁化の向きは前記円柱又は円筒の軸に直交する方向であり、前記磁性結晶粒の磁化容易軸の方向が等方的である、磁石。
- さらに樹脂を含有する、請求項1記載の磁石。
- 前記軸に直交するひとつの面は、前記軸と交わる点の周りに、前記軸と交わる点の磁束密度に対して±2%の範囲内となる磁束密度を持つ領域を有し、前記領域の内接円の半径が0.5mm以上である、請求項1又2記載の磁石。
- 前記軸に直交するひとつの面は、前記軸と交わる点の周りに、前記軸と交わる点の面内磁界の向きに対する傾きが±0.6°の範囲内となる面内磁界の向きを持つ領域を有し、前記領域の内接円の半径が0.5mm以上である、請求項1又2記載の磁石。
- 前記磁性結晶粒は、希土類元素、遷移元素、及び、ホウ素を含む、請求項1〜4のいずれか1項に記載の磁石。
- 請求項1〜5のいずれか1項に記載の磁石と、前記磁石を保持する磁石保持体と、を備える、磁石構造体。
- 請求項6に記載の磁石構造体と、磁界の向きを検出する磁気センサと、を備える、回転角度検出器。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017082240A JP2018182161A (ja) | 2017-04-18 | 2017-04-18 | 磁石、磁石構造体、及び、回転角度検出器 |
US15/944,943 US10982974B2 (en) | 2017-04-18 | 2018-04-04 | Magnet, magnet structure, and rotational angle detector |
CN201810342694.5A CN108735418B (zh) | 2017-04-18 | 2018-04-17 | 磁铁、磁铁结构体及旋转角度检测器 |
DE102018109218.0A DE102018109218A1 (de) | 2017-04-18 | 2018-04-18 | Magnet, Magnetstruktur und Drehwinkeldetektor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017082240A JP2018182161A (ja) | 2017-04-18 | 2017-04-18 | 磁石、磁石構造体、及び、回転角度検出器 |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2018182161A true JP2018182161A (ja) | 2018-11-15 |
Family
ID=63679231
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2017082240A Pending JP2018182161A (ja) | 2017-04-18 | 2017-04-18 | 磁石、磁石構造体、及び、回転角度検出器 |
Country Status (4)
Country | Link |
---|---|
US (1) | US10982974B2 (ja) |
JP (1) | JP2018182161A (ja) |
CN (1) | CN108735418B (ja) |
DE (1) | DE102018109218A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021117135A1 (ja) * | 2019-12-10 | 2021-06-17 | 三菱電機株式会社 | 磁気発生ユニット、回転角度検出装置、および回転電機 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102573052B1 (ko) * | 2018-05-31 | 2023-08-31 | 에이치엘만도 주식회사 | 모터 센서 마그넷 조립 구조 |
DE102019205193A1 (de) * | 2019-04-11 | 2020-10-15 | Robert Bosch Gmbh | Messwertgeber für eine magnetische Messvorrichtung |
DE102021208420A1 (de) | 2021-08-03 | 2023-02-09 | Brose Fahrzeugteile Se & Co. Kommanditgesellschaft, Bamberg | Verstellantrieb für ein Verstellelement eines Kraftfahrzeugs |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008056756A1 (fr) * | 2006-11-10 | 2008-05-15 | Uchiyama Manufacturing Corp. | Codeur magnétique à diode et son procédé de fabrication |
JP2011058870A (ja) * | 2009-09-08 | 2011-03-24 | Ntn Corp | 回転角度検出センサ |
JP2015508899A (ja) * | 2012-02-29 | 2015-03-23 | ツエントルム・ミクロエレクトロニク・ドレスデン・アクチエンゲゼルシャフト | 動く物体の絶対位置を冗長的に計測する装置及び方法 |
JP2015135312A (ja) * | 2014-01-20 | 2015-07-27 | Tdk株式会社 | 回転磁界センサおよびそれを用いた角度決定方法 |
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 |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE333506B (ja) | 1967-12-11 | 1971-03-15 | Svenska Precisionsverktyg Ab | |
JPS5141780B2 (ja) | 1971-11-17 | 1976-11-11 | ||
DE2221736C2 (de) | 1972-05-04 | 1974-03-21 | Chemische Werke Huels Ag, 4370 Marl | Verfahren zur Abtrennung von Natriummethallylsulfonat |
NL7508078A (nl) | 1974-08-16 | 1976-02-18 | Parkson Corp | Continue werkwijze voor het strippen van latex. |
US4902361A (en) | 1983-05-09 | 1990-02-20 | General Motors Corporation | Bonded rare earth-iron magnets |
CA2014974A1 (en) | 1989-03-18 | 1991-10-19 | Ken Ikuma | Dies for extrusion moulding |
EP0452580B1 (en) | 1990-04-19 | 1999-06-23 | Seiko Epson Corporation | A resin bound magnet and its production process |
DE4014885C2 (de) * | 1989-05-13 | 1995-07-13 | Aisan Ind | Drehwinkelaufnehmer |
WO1994015345A1 (en) | 1992-12-28 | 1994-07-07 | Aichi Steel Works, Ltd. | Rare earth magnetic powder, method of its manufacture, and resin-bonded magnet |
CN1094843A (zh) | 1993-04-30 | 1994-11-09 | 爱知制钢株式会社 | 稀土类磁粉、其制造方法及树脂粘接型磁体 |
JP4291936B2 (ja) * | 2000-07-12 | 2009-07-08 | カヤバ工業株式会社 | 回転角度センサ |
DE60335331D1 (de) * | 2002-10-08 | 2011-01-27 | Hitachi Metals Ltd | R-Fe-B gesinterter Permanentmagnet und Verfahren zu dessen Herstellung |
US20050068024A1 (en) * | 2003-09-29 | 2005-03-31 | Byram Robert James | Rotary position sensor |
CN101358833B (zh) * | 2008-09-17 | 2011-01-12 | 联合汽车电子有限公司 | 角度位置传感器 |
CN201281584Y (zh) * | 2008-09-17 | 2009-07-29 | 联合汽车电子有限公司 | 角度位置传感器 |
JP4947321B2 (ja) | 2009-07-30 | 2012-06-06 | Tdk株式会社 | 回転角度検出装置 |
JP5141780B2 (ja) | 2011-01-12 | 2013-02-13 | Tdk株式会社 | 回転角度センサ |
WO2015087890A1 (ja) | 2013-12-13 | 2015-06-18 | Ntn株式会社 | ケース付き圧縮ボンド磁石およびその製造方法 |
JP6467977B2 (ja) | 2015-02-20 | 2019-02-13 | Tdk株式会社 | 磁石構造体及び回転角度検出器 |
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 |
JP2017191037A (ja) | 2016-04-14 | 2017-10-19 | Tdk株式会社 | 磁石構造体及び回転角度検出器 |
-
2017
- 2017-04-18 JP JP2017082240A patent/JP2018182161A/ja active Pending
-
2018
- 2018-04-04 US US15/944,943 patent/US10982974B2/en active Active
- 2018-04-17 CN CN201810342694.5A patent/CN108735418B/zh active Active
- 2018-04-18 DE DE102018109218.0A patent/DE102018109218A1/de active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008056756A1 (fr) * | 2006-11-10 | 2008-05-15 | Uchiyama Manufacturing Corp. | Codeur magnétique à diode et son procédé de fabrication |
JP2011058870A (ja) * | 2009-09-08 | 2011-03-24 | Ntn Corp | 回転角度検出センサ |
JP2015508899A (ja) * | 2012-02-29 | 2015-03-23 | ツエントルム・ミクロエレクトロニク・ドレスデン・アクチエンゲゼルシャフト | 動く物体の絶対位置を冗長的に計測する装置及び方法 |
JP2015135312A (ja) * | 2014-01-20 | 2015-07-27 | Tdk株式会社 | 回転磁界センサおよびそれを用いた角度決定方法 |
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 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021117135A1 (ja) * | 2019-12-10 | 2021-06-17 | 三菱電機株式会社 | 磁気発生ユニット、回転角度検出装置、および回転電機 |
JPWO2021117135A1 (ja) * | 2019-12-10 | 2021-06-17 | ||
CN114729822A (zh) * | 2019-12-10 | 2022-07-08 | 三菱电机株式会社 | 磁产生单元、旋转角度检测装置和旋转电机 |
JP7306485B2 (ja) | 2019-12-10 | 2023-07-11 | 三菱電機株式会社 | 磁気発生ユニット、回転角度検出装置、および回転電機 |
CN114729822B (zh) * | 2019-12-10 | 2024-03-08 | 三菱电机株式会社 | 磁产生单元、旋转角度检测装置和旋转电机 |
Also Published As
Publication number | Publication date |
---|---|
US10982974B2 (en) | 2021-04-20 |
CN108735418A (zh) | 2018-11-02 |
US20180299296A1 (en) | 2018-10-18 |
CN108735418B (zh) | 2021-10-12 |
DE102018109218A1 (de) | 2018-10-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN108735418B (zh) | 磁铁、磁铁结构体及旋转角度检测器 | |
US8957669B2 (en) | Magnet and holder assembly having improved rotational and axial stability | |
US11616421B2 (en) | Magnet structure, rotational angle detector, and electric power steering device | |
US5266917A (en) | Linear magnetic sensing device | |
JP2003199274A (ja) | 回転子とその製造法及び回転機 | |
JP2016153766A (ja) | 磁石構造体及び回転角度検出器 | |
JP2014501389A (ja) | 角度センサ、角度センサ用の歯車、及び歯車の製造方法 | |
JP6467977B2 (ja) | 磁石構造体及び回転角度検出器 | |
CN109813212B (zh) | 用于角度检测的磁体装置 | |
JP2011033373A (ja) | 回転角度検出装置 | |
JP2007214393A (ja) | リング状の極異方性プラスチック磁石及びモータ用ロータ | |
JP2008209340A (ja) | 磁石回転子及びこれを用いた回転角度検出装置 | |
CN209263897U (zh) | 磁铁结构体、旋转角度检测器及电动动力转向装置 | |
JP6897638B2 (ja) | 磁石の評価方法および評価装置 | |
JP7067141B2 (ja) | 磁石構造体、回転角度検出器、電動パワーステアリング装置、および磁石構造体の製造方法 | |
JP2018142635A (ja) | 異方性ボンド磁石の成形用金型及びこれを用いた製造方法 | |
JP6954187B2 (ja) | 磁石構造体、回転角度検出器および電動パワーステアリング装置 | |
JP6879457B2 (ja) | 異方性ボンド磁石の成形用金型及びこれを用いた製造方法 | |
US11874140B2 (en) | Tapered magnet | |
CN209355860U (zh) | 磁铁结构体、旋转角度检测器及电动动力转向装置 | |
JP7027898B2 (ja) | 異方性磁石の成形用金型及びこれを用いた異方性磁石の製造方法 | |
JP6878882B2 (ja) | 異方性ボンド磁石の成形用金型及びこれを用いた製造方法 | |
JP7453684B2 (ja) | リング形状磁石、リング形状磁石の製造方法、及びそれに使用する金型 | |
JP2019158407A (ja) | 磁石構造体、回転角度検出器および電動パワーステアリング装置 | |
JP2019158411A (ja) | 磁石構造体、回転角度検出器および電動パワーステアリング装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20200109 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20201006 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20201020 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20201218 |
|
A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20210224 |