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).
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Publication number: 20240146168Abstract: 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: ApplicationFiled: March 14, 2022Publication date: May 2, 2024Inventors: Takaaki OCHIAI, Takahiro BEPPU
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Patent number: 10283923Abstract: 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: GrantFiled: June 21, 2016Date of Patent: May 7, 2019Assignee: Minebea Co., Ltd.Inventor: Takaaki Ochiai
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Patent number: 10082407Abstract: 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: GrantFiled: December 14, 2016Date of Patent: September 25, 2018Assignee: MINEBEA MITSUMI INC.Inventors: Takaaki Ochiai, Takuji Yamada, Ichiro Sasada, Takuya Matsuda, Jisho Oshino
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Patent number: 9923435Abstract: 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: GrantFiled: May 22, 2017Date of Patent: March 20, 2018Assignee: Minebea Co., Ltd.Inventor: Takaaki Ochiai
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Publication number: 20170257010Abstract: 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: ApplicationFiled: May 22, 2017Publication date: September 7, 2017Applicant: MINEBEA CO., LTD.Inventor: Takaaki OCHIAI
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Patent number: 9692280Abstract: 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: GrantFiled: June 11, 2014Date of Patent: June 27, 2017Assignee: Minebea Co., Ltd.Inventor: Takaaki Ochiai
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Publication number: 20170167895Abstract: 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: ApplicationFiled: December 14, 2016Publication date: June 15, 2017Applicant: MINEBEA CO., LTD.Inventors: Takaaki OCHIAI, Takuji YAMADA, Ichiro SASADA, Takuya MATSUDA, Jisho OSHINO
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Patent number: 9664498Abstract: 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: GrantFiled: December 10, 2012Date of Patent: May 30, 2017Assignee: MINEBEA CO., LTD.Inventors: Takaaki Ochiai, Shuumei Shirayanagi
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Patent number: 9534940Abstract: 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: GrantFiled: August 18, 2015Date of Patent: January 3, 2017Assignee: MINEBEA CO., LTD.Inventors: Takaaki Ochiai, Shumei Shirayanagi, Fujito Kawai
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Publication number: 20160377454Abstract: 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: ApplicationFiled: June 21, 2016Publication date: December 29, 2016Inventor: Takaaki OCHIAI
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Patent number: 9488506Abstract: 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: GrantFiled: July 31, 2013Date of Patent: November 8, 2016Assignee: MINEBEA CO., LTD.Inventors: Takaaki Ochiai, Shumei Shirayanagi, Fujito Kawai
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Publication number: 20150354995Abstract: 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: ApplicationFiled: August 18, 2015Publication date: December 10, 2015Inventors: Takaaki OCHIAI, Shumei SHIRAYANAGI, Fujito KAWAI
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Patent number: 9163927Abstract: 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: GrantFiled: September 16, 2013Date of Patent: October 20, 2015Assignee: Minbea Co., Ltd.Inventor: Takaaki Ochiai
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Patent number: 9136748Abstract: 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: GrantFiled: July 20, 2012Date of Patent: September 15, 2015Assignee: MINEBEA CO., LTD.Inventor: Takaaki Ochiai
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Publication number: 20150002141Abstract: 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: ApplicationFiled: June 11, 2014Publication date: January 1, 2015Inventor: Takaaki OCHIAI
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Publication number: 20140125326Abstract: 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: ApplicationFiled: September 16, 2013Publication date: May 8, 2014Applicant: MINEBEA CO., LTD.Inventor: Takaaki OCHIAI
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Patent number: 8710829Abstract: 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: GrantFiled: June 10, 2010Date of Patent: April 29, 2014Assignee: Minebea Co., Ltd.Inventors: Takako Fukuda, Takaaki Ochiai
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Patent number: 8692542Abstract: 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: GrantFiled: March 23, 2012Date of Patent: April 8, 2014Assignee: Mineba Co., Ltd.Inventors: Mutsumi Matsuura, Takaaki Ochiai
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Publication number: 20140084758Abstract: 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: ApplicationFiled: July 31, 2013Publication date: March 27, 2014Applicant: Minebea Co., LtdInventors: Takaaki OCHIAI, Shumei SHIRAYANAGI, Fujito KAWAI
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Patent number: 8415945Abstract: 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: GrantFiled: August 5, 2010Date of Patent: April 9, 2013Assignee: Minebea Co., Ltd.Inventors: Kazuhiko Fujita, Takado Fukuda, Takaaki Ochiai