公开(公告)号：US20110037459A1

公开(公告)日：2011-02-17

申请号：US12988277

申请日：2010-03-26

Applicant: Yasuyuki Okada ,  Kyohei Aimuta ,  Chiharu Mitsumata

Inventor： Yasuyuki Okada ,  Kyohei Aimuta ,  Chiharu Mitsumata

IPC: G01B7/30

CPC classification number: G01D5/145

Abstract: A rotation-angle-detecting apparatus comprising a magnet rotor, a magnetic sensor detecting the direction of magnetic flux from the magnet rotor, a correction circuit, and an angle-calculating circuit, the magnetic sensor having bridge circuits X and Y each comprising four connected magnetoresistive devices, each magnetoresistive device comprising a spin-valve, giant-magnetoresistive film, the correction circuit calculating difference (Vx−Vy) and sum (Vx+Vy) from the output voltage Vx of the bridge circuit X and the output voltage Vy of the bridge circuit Y, and making their amplitudes equal to each other, and the angle-calculating circuit determining the rotation angle of the rotor by arctangent calculation from a signal (Vx−Vy)′ and a signal (Vx+Vy)′ supplied with the same amplitude from the correction circuit.

Abstract translation: 一种旋转角检测装置，包括磁转子，检测来自磁转子的磁通方向的磁传感器，校正电路和角度计算电路，所述磁传感器具有桥接电路X和Y，每个包括四个连接 磁阻器件，每个磁阻器件包括自旋阀，巨磁阻膜，校正电路计算差值（Vx-Vy）和桥接电路X的输出电压Vx的和（Vx + Vy）和输出电压Vy 桥接电路Y，使它们的振幅彼此相等，并且角度计算电路根据由信号（Vx-Vy）'和提供的信号（Vx + Vy））的反正切计算确定转子的旋转角度 来自校正电路的幅度相同。

公开(公告)号：US07847460B2

公开(公告)日：2010-12-07

申请号：US12280928

申请日：2007-02-28

Applicant: Masahiro Masuzawa ,  Masahiro Mita ,  Shigeho Tanigawa ,  Kyohei Aimuta

Inventor： Masahiro Masuzawa ,  Masahiro Mita ,  Shigeho Tanigawa ,  Kyohei Aimuta

IPC: H01F3/08

CPC classification number: H02K15/03 ,  H01F1/26 ,  H01F1/37 ,  H01F3/10 ,  H01F41/0246 ,  H01F41/0266 ,  H01F2003/103 ,  H02K1/2733 ,  H02K1/276 ,  H02K1/2766 ,  H02K1/278

Abstract: This invention provides a soft magnetic yoke-integrated bonded magnet in which a soft magnetic yoke has been integrally compression molded in such a state that the soft magnetic yoke is engaged in a joined face formed by bringing a binding material-containing magnetic powder into contact with a binding material-containing soft magnetic powder. The soft magnetic yoke part and the bonded magnetic part are constructed so that, when the soft magnetic yoke part and the bonded magnet part are compression molded separately from each other, the spring back level is identical upon the release of the compression force.

Abstract translation: 本发明提供了一种软磁轭一体型粘结磁体，其中软磁轭已经被整体地压缩成型，使得软磁轭接合在通过使含粘合材料的磁粉与 含有粘合剂的软磁粉末。 软磁轭部和接合磁性部构成为，当软磁轭部和粘结磁体部彼此分开压缩成型时，弹性回位水平在释放压缩力时相同。

公开(公告)号：US08587295B2

公开(公告)日：2013-11-19

申请号：US13203385

申请日：2010-02-26

Applicant: Kyohei Aimuta ,  Masahiro Mita

Inventor： Kyohei Aimuta ,  Masahiro Mita

IPC: G01B7/30 ,  G01B7/14

CPC classification number: G01D5/145 ,  G01D3/02 ,  G01D5/24476

Abstract: An angle detection apparatus comprising a magnet rotor having a multi-pole segment magnet, and a magnetic sensor for detecting the direction of a magnetic flux generated from the multi-pole segment magnet; the multi-pole segment magnet having pluralities of magnetic poles along the rotation direction of the magnet rotor, the magnetic sensor comprising a magnetosensitive plane having pluralities of spin-valve, giant-magnetoresistive devices each having a pinned layer having a fixed magnetization direction and a free layer having a magnetization direction rotating in response to the magnetic flux direction; and the magnetic sensor being positioned relative to the magnet rotor, such that the magnetosensitive plane crosses the magnetic flux, with perpendicular magnetic flux density components having different amplitudes on the magnetosensitive plane.

Abstract translation: 一种角度检测装置，包括具有多极段磁体的磁转子和用于检测从多极段磁体产生的磁通方向的磁传感器; 所述多极段磁体具有沿磁体转子旋转方向的多个磁极，该磁传感器包括具有多个自旋阀的磁感应平面，具有固定磁化方向的固定层的巨磁电阻装置和 具有响应于磁通方向旋转的磁化方向的自由层; 并且磁传感器相对于磁体转子定位，使得磁感应平面与感磁平面上具有不同振幅的垂直磁通密度分量穿过磁通。

公开(公告)号：US08115479B2

公开(公告)日：2012-02-14

申请号：US12302232

申请日：2007-11-20

Applicant: Kyohei Aimuta ,  Osamu Shimoe ,  Masahiro Mita

Inventor： Kyohei Aimuta ,  Osamu Shimoe ,  Masahiro Mita

IPC: G01B7/30 ,  G01R33/02

CPC classification number: G01D5/145 ,  G01D5/2451

Abstract: A rotation-angle-detecting apparatus comprising a magnet rotor having 4 or more magnetic poles on the surface, and sensor device for detecting magnetic flux from the magnet rotor, and an electronic circuit for outputting a signal representing the rotation angle of the magnet rotor using pluralities of signals obtained from the sensor device, the sensor device having pluralities of spin-valve, giant-magnetoresistive devices for outputting two or more different phase signals from a rotating magnetic field near the rotating magnet, each spin-valve, giant-magnetoresistive device having a pinned layer and a free layer, the magnetization direction of the pinned layer being fixed, and the magnetization direction of the free layer rotating depending on a magnetic field direction, pluralities of the spin-valve, giant-magnetoresistive devices comprising a first spin-valve, giant-magnetoresistive device having a reference magnetic-field-sensing direction, and a second spin-valve, giant-magnetoresistive device having a magnetic-field-sensing direction different from that of the first spin-valve, giant-magnetoresistive device.

Abstract translation: 一种旋转角度检测装置，包括表面上具有4个或更多个磁极的磁转子和用于检测来自磁转子的磁通的传感器装置，以及电子电路，用于输出表示磁体转子的旋转角度的信号，该电子电路使用 从传感器装置获得的多个信号，具有多个自旋阀的传感器装置，用于从旋转磁体附近的旋转磁场输出两个或多个不同相位信号的巨磁阻装置，每个自旋阀，巨磁阻装置 具有钉扎层和自由层，被钉扎层的磁化方向被固定，并且自由层的磁化方向根据磁场方向旋转，多个自旋阀，巨磁阻器件包括第一旋转 - 具有参考磁场感测方向的巨磁阻器件和第二自旋阀，巨磁电机 具有与第一自旋阀，巨磁阻器件的磁场感测方向不同的磁场感测方向。

公开(公告)号：US08564283B2

公开(公告)日：2013-10-22

申请号：US12866509

申请日：2009-02-03

Applicant: Masahiro Mita ,  Kyohei Aimuta ,  Osamu Shimoe ,  Rihito Kagawa

Inventor： Masahiro Mita ,  Kyohei Aimuta ,  Osamu Shimoe ,  Rihito Kagawa

IPC: G01B7/30

CPC classification number: G01D5/145 ,  G01D5/24438 ,  G01D5/2448

Abstract: An apparatus for detecting a rotation angle using a magnet rotor comprising a magnet having 2N poles, wherein N is a natural number, and a sensor device for detecting the direction of a magnetic flux from the magnet rotor, at least one of two output voltages obtained in radial and rotational directions by the sensor device being multiplied by a correction coefficient, and the rotation angle being calculated from the two corrected output voltages to increase the detection accuracy of the rotation angle.

Abstract translation: 一种使用包括具有2N个磁极的磁体的磁转子来检测旋转角度的装置，其中N是自然数，以及用于检测来自磁体转子的磁通方向的传感器装置，获得两个输出电压中的至少一个 通过传感器装置的径向和旋转方向乘以校正系数，并且根据两个校正的输出电压计算旋转角度以增加旋转角度的检测精度。

公开(公告)号：US20100321008A1

公开(公告)日：2010-12-23

申请号：US12866509

申请日：2009-02-03

Applicant: Masahiro Mita ,  Kyohei Aimuta ,  Osamu Shimoe ,  Rihito Kagawa

Inventor： Masahiro Mita ,  Kyohei Aimuta ,  Osamu Shimoe ,  Rihito Kagawa

IPC: G01B7/30

CPC classification number: G01D5/145 ,  G01D5/24438 ,  G01D5/2448

Abstract: An apparatus for detecting a rotation angle using a magnet rotor comprising a magnet having 2N poles, wherein N is a natural number, and a sensor device for detecting the direction of a magnetic flux from the magnet rotor, at least one of two output voltages obtained in radial and rotational directions by the sensor device being multiplied by a correction coefficient, and the rotation angle being calculated from the two corrected output voltages to increase the detection accuracy of the rotation angle.

Abstract translation: 一种使用包括具有2N个磁极的磁体的磁转子来检测旋转角度的装置，其中N是自然数，以及用于检测来自磁体转子的磁通方向的传感器装置，获得两个输出电压中的至少一个 通过传感器装置的径向和旋转方向乘以校正系数，并且根据两个校正的输出电压计算旋转角度以增加旋转角度的检测精度。

公开(公告)号：US20090206827A1

公开(公告)日：2009-08-20

申请号：US12302232

申请日：2007-11-20

Applicant: Kyohei Aimuta ,  Osamu Shimoe

Inventor： Kyohei Aimuta ,  Osamu Shimoe

IPC: G01B7/30

CPC classification number: G01D5/145 ,  G01D5/2451

Abstract: A rotation-angle-detecting apparatus comprising a magnet rotor having 4 or more magnetic poles on the surface, and sensor device for detecting magnetic flux from the magnet rotor, and an electronic circuit for outputting a signal representing the rotation angle of the magnet rotor using pluralities of signals obtained from the sensor device, the sensor device having pluralities of spin-valve, giant-magnetoresistive devices for outputting two or more different phase signals from a rotating magnetic field near the rotating magnet, each spin-valve, giant-magnetoresistive device having a pinned layer and a free layer, the magnetization direction of the pinned layer being fixed, and the magnetization direction of the free layer rotating depending on a magnetic field direction, pluralities of the spin-valve, giant-magnetoresistive devices comprising a first spin-valve, giant-magnetoresistive device having a reference magnetic-field-sensing direction, and a second spin-valve, giant-magnetoresistive device having a magnetic-field-sensing direction different from that of the first spin-valve, giant-magnetoresistive device.

Abstract translation: 一种旋转角度检测装置，包括表面上具有4个或更多个磁极的磁转子和用于检测来自磁转子的磁通的传感器装置，以及电子电路，用于输出表示磁体转子的旋转角度的信号，该电子电路使用 从传感器装置获得的多个信号，具有多个自旋阀的传感器装置，用于从旋转磁体附近的旋转磁场输出两个或多个不同相位信号的巨磁阻装置，每个自旋阀，巨磁阻装置 具有钉扎层和自由层，被钉扎层的磁化方向被固定，并且自由层的磁化方向根据磁场方向旋转，多个自旋阀，巨磁阻器件包括第一旋转 - 具有参考磁场感测方向的巨磁阻器件和第二自旋阀，巨磁电机 具有与第一自旋阀，巨磁阻器件的磁场感测方向不同的磁场感测方向。

公开(公告)号：US20090085416A1

公开(公告)日：2009-04-02

申请号：US12280928

申请日：2007-02-28

Applicant: Masahiro Masuzawa ,  Masahiro Mita ,  Shigeho Tanigawa ,  Kyohei Aimuta

Inventor： Masahiro Masuzawa ,  Masahiro Mita ,  Shigeho Tanigawa ,  Kyohei Aimuta

IPC: H01F3/08

CPC classification number: H02K15/03 ,  H01F1/26 ,  H01F1/37 ,  H01F3/10 ,  H01F41/0246 ,  H01F41/0266 ,  H01F2003/103 ,  H02K1/2733 ,  H02K1/276 ,  H02K1/2766 ,  H02K1/278

Abstract: This invention provides a soft magnetic yoke-integrated bonded magnet in which a soft magnetic yoke has been integrally compression molded in such a state that the soft magnetic yoke is engaged in a joined face formed by bringing a binding material-containing magnetic powder into contact with a binding material-containing soft magnetic powder. The soft magnetic yoke part and the bonded magnetic part are constructed so that, when the soft magnetic yoke part and the bonded magnet part are compression molded separately from each other, the spring back level is identical upon the release of the compression force.

Abstract translation: 本发明提供了一种软磁轭一体型粘结磁体，其中软磁轭已经被整体地压缩成型，使得软磁轭接合在通过使含粘合材料的磁粉与 含有粘合剂的软磁粉末。 软磁轭部和接合磁性部构成为，当软磁轭部和粘结磁体部彼此分开压缩成型时，弹性回位水平在释放压缩力时相同。

公开(公告)号：US20120038348A1

公开(公告)日：2012-02-16

申请号：US13203385

申请日：2010-02-26

Applicant: Kyohei Aimuta ,  Masahiro Mita

Inventor： Kyohei Aimuta ,  Masahiro Mita

IPC: G01B7/30

CPC classification number: G01D5/145 ,  G01D3/02 ,  G01D5/24476

Abstract: An angle detection apparatus comprising a magnet rotor having a multi-pole segment magnet, and a magnetic sensor for detecting the direction of a magnetic flux generated from the multi-pole segment magnet; the multi-pole segment magnet having pluralities of magnetic poles along the rotation direction of the magnet rotor, the magnetic sensor comprising a magnetosensitive plane having pluralities of spin-valve, giant-magnetoresistive devices each having a pinned layer having a fixed magnetization direction and a free layer having a magnetization direction rotating in response to the magnetic flux direction; and the magnetic sensor being positioned relative to the magnet rotor, such that the magnetosensitive plane crosses the magnetic flux, with perpendicular magnetic flux density components having different amplitudes on the magnetosensitive plane.

Abstract translation: 一种角度检测装置，包括具有多极段磁体的磁转子和用于检测从多极段磁体产生的磁通方向的磁传感器; 所述多极段磁体具有沿磁体转子旋转方向的多个磁极，该磁传感器包括具有多个自旋阀的磁感应平面，具有固定磁化方向的固定层的巨磁电阻装置和 具有响应于磁通方向旋转的磁化方向的自由层; 并且磁传感器相对于磁体转子定位，使得磁感应平面与感磁平面上具有不同振幅的垂直磁通密度分量穿过磁通。

公开(公告)号：US08093886B2

公开(公告)日：2012-01-10

申请号：US12988277

申请日：2010-03-26

Applicant: Yasuyuki Okada ,  Kyohei Aimuta ,  Chiharu Mitsumata

Inventor： Yasuyuki Okada ,  Kyohei Aimuta ,  Chiharu Mitsumata

IPC: G01B7/30

CPC classification number: G01D5/145

Abstract: A rotation-angle-detecting apparatus comprising a magnet rotor, a magnetic sensor detecting the direction of magnetic flux from the magnet rotor, a correction circuit, and an angle-calculating circuit, the magnetic sensor having bridge circuits X and Y each comprising four connected magnetoresistive devices, each magnetoresistive device comprising a spin-valve, giant-magnetoresistive film, the correction circuit calculating difference (Vx−Vy) and sum (Vx+Vy) from the output voltage Vx of the bridge circuit X and the output voltage Vy of the bridge circuit Y, and making their amplitudes equal to each other, and the angle-calculating circuit determining the rotation angle of the rotor by arctangent calculation from a signal (Vx−Vy)′ and a signal (Vx+Vy)′ supplied with the same amplitude from the correction circuit.

Abstract translation: 一种旋转角检测装置，包括磁转子，检测来自磁转子的磁通方向的磁传感器，校正电路和角度计算电路，所述磁传感器具有桥接电路X和Y，每个包括四个连接 磁阻器件，每个磁阻器件包括自旋阀，巨磁阻膜，校正电路计算差值（Vx-Vy）和桥接电路X的输出电压Vx的和（Vx + Vy）和输出电压Vy 桥接电路Y，使它们的振幅彼此相等，并且角度计算电路根据由信号（Vx-Vy）'和提供的信号（Vx + Vy））的反正切计算确定转子的旋转角度 来自校正电路的幅度相同。