Patents by Inventor Takaaki Ochiai

Takaaki Ochiai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240146168
    Abstract: A stator includes a stator core, a stator winding wound via an insulator provided at the stator core, and a terminal block arranged at an outer side in a direction of the stator core. The stator core includes an end portion protruding from an opening of a housing in an axial direction and is mounted to the housing by a mounting bracket being in contact with an end face of the end portion. The mounting bracket includes an annular portion having a C-shape, a connecting portion disposed between both ends of the annular portion, and a bent portion protruding upward in the axial direction at an inner circumferential edge portion of the annular portion. The bent portion is in contact with the end face of the stator core. The connecting portion includes a relief portion extending at a position away from the terminal block.
    Type: Application
    Filed: March 14, 2022
    Publication date: May 2, 2024
    Inventors: Takaaki OCHIAI, Takahiro BEPPU
  • Patent number: 10283923
    Abstract: A resolver includes: a stator core; and an insulator that is mounted on the annular stator core, wherein a terminal pin base that extends outward in a radial direction is integrally formed in the insulator, wherein a plurality of terminal pins are disposed on the terminal pin base, wherein each of the terminal pins has a first connecting portion at one end and a second connecting portion at the other end, wherein first and second covers are provided on the terminal pin base at each sides in an axial direction, wherein the first connecting portion and the second connecting portion of the terminal pin are sealed in a filler which fills a first space and a second space, the first space being formed between the first cover and the terminal pin base, and the second space being formed between the second cover and the terminal pin base.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: May 7, 2019
    Assignee: Minebea Co., Ltd.
    Inventor: Takaaki Ochiai
  • Patent number: 10082407
    Abstract: An angle detecting apparatus using a resolver disposed at a position where an external magnetic field is present on one side in an axial direction includes a rotor that is rotatable and made of a magnetic material, a magnetic permeability of the magnet material having an uniaxial anisotropy as an entirety, and a stator disposed to face the rotor, the stator including an exciting coil and a detection coil for detecting a magnetic flux generated by the exciting coil, the rotor being provided between the stator and the external magnetic field.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: September 25, 2018
    Assignee: MINEBEA MITSUMI INC.
    Inventors: Takaaki Ochiai, Takuji Yamada, Ichiro Sasada, Takuya Matsuda, Jisho Oshino
  • Patent number: 9923435
    Abstract: A production method for a rotor core for a VR type resolver has a structure in which one protrusion is formed on an inner edge thereof in which the rotor cores can be rotated and laminated without increasing cost. In a production method of a rotor core for a VR type resolver, a plurality of tabular rotor core pieces are laminated. In this case, in the rotor core pieces, four protrusions are simultaneously formed, one of them is left, the remainder thereof is removed, and rotating lamination is carried out.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: March 20, 2018
    Assignee: Minebea Co., Ltd.
    Inventor: Takaaki Ochiai
  • Publication number: 20170257010
    Abstract: A production method for a rotor core for a VR type resolver has a structure in which one protrusion is formed on an inner edge thereof in which the rotor cores can be rotated and laminated without increasing cost. In a production method of a rotor core for a VR type resolver, a plurality of tabular rotor core pieces are laminated. In this case, in the rotor core pieces, four protrusions are simultaneously formed, one of them is left, the remainder thereof is removed, and rotating lamination is carried out.
    Type: Application
    Filed: May 22, 2017
    Publication date: September 7, 2017
    Applicant: MINEBEA CO., LTD.
    Inventor: Takaaki OCHIAI
  • Patent number: 9692280
    Abstract: A production method for a rotor core for a VR type resolver has a structure in which one protrusion is formed on an inner edge thereof in which the rotor cores can be rotated and laminated without increasing cost. In a production method of a rotor core for a VR type resolver, a plurality of tabular rotor core pieces are laminated. In this case, in the rotor core pieces, four protrusions are simultaneously formed, one of them is left, the remainder thereof is removed, and rotating lamination is carried out.
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: June 27, 2017
    Assignee: Minebea Co., Ltd.
    Inventor: Takaaki Ochiai
  • Publication number: 20170167895
    Abstract: An angle detecting apparatus using a resolver disposed at a position where an external magnetic field is present on one side in an axial direction includes a rotor that is rotatable and made of a magnetic material, a magnetic permeability of the magnet material having an uniaxial anisotropy as an entirety, and a stator disposed to face the rotor, the stator including an exciting coil and a detection coil for detecting a magnetic flux generated by the exciting coil, the rotor being provided between the stator and the external magnetic field.
    Type: Application
    Filed: December 14, 2016
    Publication date: June 15, 2017
    Applicant: MINEBEA CO., LTD.
    Inventors: Takaaki OCHIAI, Takuji YAMADA, Ichiro SASADA, Takuya MATSUDA, Jisho OSHINO
  • Patent number: 9664498
    Abstract: A variable reluctance resolver has a stator combined with a housing. The resolver does not require extra space in a case for a device, into which the resolver is mounted, and it is easily coaxially mounted to the device. The resolver includes a ring-like stator 10, a rotor 20, and a housing 30. The stator 10 has a stator core 100, a first insulator 110, a second insulator 120, and coils 130. The stator core 100 is provided with plural salient poles 101. The first insulator 110 and the second insulator 120 hold the stator core 100 therebetween from both sides of the stator core 100. The coils 130 are wound to the salient poles 101 via the first insulator 110 and the second insulator 120. The housing 30 accommodates the stator 10. The first insulator 110 is coaxially integrally formed with the housing 30.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: May 30, 2017
    Assignee: MINEBEA CO., LTD.
    Inventors: Takaaki Ochiai, Shuumei Shirayanagi
  • Patent number: 9534940
    Abstract: A resolver can have a stator installed in a housing simply, without requiring a special jig. In the resolver including a housing and a stator core fixed in the housing, the stator core is fixed to the inside of the housing by rotating relative to the housing.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: January 3, 2017
    Assignee: MINEBEA CO., LTD.
    Inventors: Takaaki Ochiai, Shumei Shirayanagi, Fujito Kawai
  • Publication number: 20160377454
    Abstract: A resolver includes: a stator core; and an insulator that is mounted on the annular stator core, wherein a terminal pin base that extends outward in a radial direction is integrally formed in the insulator, wherein a plurality of terminal pins are disposed on the terminal pin base, wherein each of the terminal pins has a first connecting portion at one end and a second connecting portion at the other end, wherein first and second covers are provided on the terminal pin base at each sides in an axial direction, wherein the first connecting portion and the second connecting portion of the terminal pin are sealed in a filler which fills a first space and a second space, the first space being formed between the first cover and the terminal pin base, and the second space being formed between the second cover and the terminal pin base.
    Type: Application
    Filed: June 21, 2016
    Publication date: December 29, 2016
    Inventor: Takaaki OCHIAI
  • Patent number: 9488506
    Abstract: A resolver can have a stator installed in a housing simply, without requiring a special jig. In the resolver including a housing and a stator core fixed in the housing, the stator core is fixed to the inside of the housing by rotating relative to the housing.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: November 8, 2016
    Assignee: MINEBEA CO., LTD.
    Inventors: Takaaki Ochiai, Shumei Shirayanagi, Fujito Kawai
  • Publication number: 20150354995
    Abstract: A resolver can have a stator installed in a housing simply, without requiring a special jig. In the resolver including a housing and a stator core fixed in the housing, the stator core is fixed to the inside of the housing by rotating relative to the housing.
    Type: Application
    Filed: August 18, 2015
    Publication date: December 10, 2015
    Inventors: Takaaki OCHIAI, Shumei SHIRAYANAGI, Fujito KAWAI
  • Patent number: 9163927
    Abstract: A resolver can have a stator and a housing fixed without requiring a special jig. The resolver includes a housing in an approximately cylindrical shape, a stator core in an approximately annular shape fixed to the inside of the housing, in which an exciting coil and a detecting coil are wound therearound, and a rotor arranged on the inside of the stator core, wherein the stator core is fixed to the housing by a C-shaped ring, a groove extending in a circumferential direction is provided on the inside of the housing, and the stator core is fixed to the housing by engaging the C-shaped ring with the groove.
    Type: Grant
    Filed: September 16, 2013
    Date of Patent: October 20, 2015
    Assignee: Minbea Co., Ltd.
    Inventor: Takaaki Ochiai
  • Patent number: 9136748
    Abstract: In a variable reluctance resolver having terminal pins at an insulator, a technique for preventing deformation of the terminal pins, shorting between the terminal pins, and contact failure at portions of the terminal pins is provided. A first insulator 300 is formed together with a terminal pin base 311 on which terminal pins 320 are provided. The terminal pins 320 are connected with end portions of windings of a stator coil 500. A cover 330 is mounted on the terminal pin base 311 by covering, and resin is filled inside the cover 330. The resin is also applied to the stator coil 500. The resin filled inside the cover 330 seals the terminal pins 320, and the cover 330 protects the terminal pins 320.
    Type: Grant
    Filed: July 20, 2012
    Date of Patent: September 15, 2015
    Assignee: MINEBEA CO., LTD.
    Inventor: Takaaki Ochiai
  • Publication number: 20150002141
    Abstract: A production method for a rotor core for a VR type resolver has a structure in which one protrusion is formed on an inner edge thereof in which the rotor cores can be rotated and laminated without increasing cost. In a production method of a rotor core for a VR type resolver, a plurality of tabular rotor core pieces are laminated. In this case, in the rotor core pieces, four protrusions are simultaneously formed, one of them is left, the remainder thereof is removed, and rotating lamination is carried out.
    Type: Application
    Filed: June 11, 2014
    Publication date: January 1, 2015
    Inventor: Takaaki OCHIAI
  • Publication number: 20140125326
    Abstract: A resolver can have a stator and a housing fixed without requiring a special jig. The resolver includes a housing in an approximately cylindrical shape, a stator core in an approximately annular shape fixed to the inside of the housing, in which an exciting coil and a detecting coil are wound therearound, and a rotor arranged on the inside of the stator core, wherein the stator core is fixed to the housing by a C-shaped ring, a groove extending in a circumferential direction is provided on the inside of the housing, and the stator core is fixed to the housing by engaging the C-shaped ring with the groove.
    Type: Application
    Filed: September 16, 2013
    Publication date: May 8, 2014
    Applicant: MINEBEA CO., LTD.
    Inventor: Takaaki OCHIAI
  • Patent number: 8710829
    Abstract: A sheet coil type is provided in which a detection coil of two phases is disposed at a stator section and structured such that a coil of sine phase a coil of cosine phase are circumferentially arranged alternately on the same plane, wherein the distance between an excitation coil at a rotor section and the coil of sine phase at the stator section is identical to the distance between the excitation coil at the rotor section and the coil of cosine phase at the stator section, whereby the difference in amplitude between at a sine phase output and at a cosine phase output is eliminated.
    Type: Grant
    Filed: June 10, 2010
    Date of Patent: April 29, 2014
    Assignee: Minebea Co., Ltd.
    Inventors: Takako Fukuda, Takaaki Ochiai
  • Patent number: 8692542
    Abstract: A VR resolver with a shaft angle multiplier of 3× has a rotor core 104 that is provided with magnetic poles 104a and 104b, which project in a radial direction, and a magnetic pole 104c, which does not project in a radial direction. The VR resolver also has a stator core 101 provided with salient poles 102c and 102e that are wound with a cosine wave detection wire and that are connected. A zero point detecting terminal is led from the cosine wave detection wire between the cosine winding wound portions of the salient poles 102c and 102e. The zero point detecting terminal provides a voltage waveform. By setting a threshold value for the voltage waveform, an absolute angle of the rotor core 104 is measured.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: April 8, 2014
    Assignee: Mineba Co., Ltd.
    Inventors: Mutsumi Matsuura, Takaaki Ochiai
  • Publication number: 20140084758
    Abstract: A resolver can have a stator installed in a housing simply, without requiring a special jig. In the resolver including a housing and a stator core fixed in the housing, the stator core is fixed to the inside of the housing by rotating relative to the housing.
    Type: Application
    Filed: July 31, 2013
    Publication date: March 27, 2014
    Applicant: Minebea Co., Ltd
    Inventors: Takaaki OCHIAI, Shumei SHIRAYANAGI, Fujito KAWAI
  • Patent number: 8415945
    Abstract: A sheet coil type resolver includes: a stator section in which a stator transformer coil composed of first and second stator transformer coil layers is disposed to axially overlap with a resolver stator coil composed of first and second resolver stator coil layers; and a rotor section in which a rotor transformer coil composed of first and second rotor transformer coil layers is disposed to axially overlap with a resolver rotor coil composed of first and second resolver rotor coil layers, whereby the axial dimension is reduced, lead wires can be easily led out from the coils, and high reliability is achieved.
    Type: Grant
    Filed: August 5, 2010
    Date of Patent: April 9, 2013
    Assignee: Minebea Co., Ltd.
    Inventors: Kazuhiko Fujita, Takado Fukuda, Takaaki Ochiai