Patents by Inventor Yoichi Tanabe
Yoichi Tanabe 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: 20240162991Abstract: An optical transmission device includes: a first optical phase modulator that outputs a first optical signal by phase-modulating the laser beam having a first oscillation frequency according to the first electric signal in a case where the first electric signal is output to the first transmission path, a second optical phase modulator that outputs a laser beam having a second oscillation frequency as the second optical signal in a case where the first electric signal is output to the first transmission path; an optical multiplexer/distributor that outputs a third optical signal and a fourth optical signal by multiplexing the first optical signal and the second optical signal and distributing a result of the multiplexing; a first detection unit that converts the third optical signal into a first heterodyne detection signal; a second detection unit that converts the fourth optical signal into a second heterodyne detection signal; and a first optical intensity modulator that intensity-modulates a laser beam haviType: ApplicationFiled: April 1, 2021Publication date: May 16, 2024Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Ryo MIYATAKE, Yoichi FUKADA, Toshiaki SHITABA, Akihiro TANABE, Tomoaki YOSHIDA
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Publication number: 20230155443Abstract: [Object] To provide a permanent magnet electric motor that can be downsized in a rotation axis direction and can also suppress a leakage flux. [Solving Means] The permanent magnet electric motor includes: a columnar rotor including a permanent magnet portion annularly disposed; a shaft disposed along a rotation axis of the rotor; a cylindrical stator core disposed on an outer circumferential side of the rotor; a main body including a shell integrally formed with the stator core; a bracket attached to one end side of the main body; and a bearing that rotatably supports the shaft. The bracket includes a bearing house portion that stores the bearing, and a non-magnetic portion that is connected to the bearing house portion. The bearing house portion is disposed on an inner diameter side relative to the permanent magnet portion as viewed from an axis direction of the rotation axis, and an edge portion of the bearing house portion on an outer diameter side is covered with the non-magnetic portion.Type: ApplicationFiled: March 24, 2021Publication date: May 18, 2023Applicant: FUJITSU GENERAL LIMITEDInventors: Yoichi TANABE, Tomonori KOJIMA, Yosuke MATSUI, Rei OMATA, Hiroo KOJIMA
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Publication number: 20230155444Abstract: [Object] To provide an electric motor that can be downsized in a rotation axis direction and can also suppress the deformation of a bearing and a bearing house portion along with the deformation of a resin shell. [Solving Means] An electric motor according to an aspect of the present invention includes: a columnar rotor; a shaft disposed along a rotation axis of the rotor; a cylindrical stator core disposed on an outer circumferential side of the rotor; a resin shell that covers the stator core; a bearing that rotatably supports the shaft; and a bearing house portion that stores the bearing. The resin shell includes an annular portion integral with the stator core, and an end surface portion connected to an end portion of the annular portion and expanding from the annular portion to an inner circumferential side. The end surface portion includes a connection portion to be connected to the bearing house portion.Type: ApplicationFiled: March 24, 2021Publication date: May 18, 2023Applicant: FUJITSU GENERAL LIMITEDInventors: Yoichi TANABE, Tomonori KOJIMA, Yosuke MATSUI, Rei OMATA, Hiroo KOJIMA
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Patent number: 8196283Abstract: In a method for manufacturing an axial air-gap electronic motor, a plurality of core member and a plurality of dummy members are prepared, wherein each of the dummy members has a shape same as that of the core members. Then, the plurality of core members is arranged such that teeth surfaces of the core members face each other, and the dummy member is arranged between predetermined core members. Thereafter, a coil is wound from one end side toward the other end side of the core members through the dummy member continuously without cutting. A part of the coil corresponding to a transition wire set between the core members is wound on the dummy member.Type: GrantFiled: March 12, 2009Date of Patent: June 12, 2012Assignee: Fujitsu General LimitedInventors: Tomonori Kojima, Toshiaki Tanno, Yoshikazu Tanaka, Yoichi Tanabe, Hirokazu Matsuzaki, Masaki Yamada, Masanori Murakami
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Publication number: 20110241467Abstract: A permanent magnet motor is provided. The permanent magnet motor includes: a stator including a stator core, and an insulator for insulating the stator core from the wire; and a rotor in which a rotating shaft is attached to a center of the rotor and a permanent magnet is provided in an outer peripheral portion of the rotor. The stator core includes an annular yoke portion, a plurality of teeth extended radially from an inner periphery of the yoke portion, and a plurality of slots for accommodating a wire to be wound around the teeth at both ends in a circumferential direction of the teeth. A number of the slots in the stator core is set to be 18, the permanent magnet of the rotor is formed by a ferrite magnet, and a number of poles of the permanent magnet is set to be 12.Type: ApplicationFiled: March 24, 2011Publication date: October 6, 2011Applicant: FUJITSU GENERAL LIMITEDInventors: Takushi FUJIOKA, Yoichi TANABE, Takuya HAMANO, Shingo SUZUKI, Shinichiro KATAGIRI
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Patent number: 7986064Abstract: There is provided an electrical motor in which the dimensional accuracy of a stator is increased more easily, and the influence exerted on a magnetic circuit is kept as little as possible. In an electrical motor in which the stator 3 formed with n number (n is a positive integer) of teeth 33 in a row in a straight line form is bent into an annular shape and the end parts thereof are connected to each other, the sum of opening angles ? of a cutout 35 formed between segments of the stator 3 is made larger than 360 degrees, and a minute clearance is formed between the opposed surfaces of the cutout 35 when the stator is bent into an annular shape.Type: GrantFiled: May 12, 2009Date of Patent: July 26, 2011Assignee: Fujitsu General LimitedInventors: Shinichiro Katagiri, Hiroaki Shibukawa, Takuya Hamano, Hirokazu Matsuzaki, Toshihiko Yamada, Takushi Fujioka, Yoichi Tanabe, Masaki Yamada, Hidetaka Terakubo, Yoshitaka Kitajima
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Patent number: 7714478Abstract: In an electric rotary machine, a stator, a metallic supporting member configured to support the stator, and a rotor are provided, the rotor is relatively rotatably supported with respect to the stator, a magnetic path is formed via a gap portion between the stator and the rotor to give a torque to the rotor, and a space section is provided to interrupt the magnetic path at a position of the metallic supporting member near to a magnetic pole of the stator facing the gap portion.Type: GrantFiled: May 8, 2007Date of Patent: May 11, 2010Assignees: Nissan Motor Co., Ltd., Fujitsu General LimitedInventors: Yuichi Shibukawa, Kenta Suzuki, Kenji Narita, Takashi Suzuki, Takushi Fujioka, Tomonori Kojima, Masanori Murakami, Yoichi Tanabe, Masaki Yamada
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Publication number: 20090284096Abstract: There is provided an electrical motor in which the dimensional accuracy of a stator is increased more easily, and the influence exerted on a magnetic circuit is kept as little as possible. In an electrical motor in which the stator 3 formed with n number (n is a positive integer) of teeth 33 in a row in a straight line form is bent into an annular shape and the end parts thereof are connected to each other, the sum of opening angles ? of a cutout 35 formed between segments of the stator 3 is made larger than 360 degrees, and a minute clearance is formed between the opposed surfaces of the cutout 35 when the stator is bent into an annular shape.Type: ApplicationFiled: May 12, 2009Publication date: November 19, 2009Applicant: FUJITSU GENERAL LIMITEDInventors: Shinichiro Katagiri, Hiroaki Shibukawa, Takuya Hamano, Hirokazu Matsuzaki, Toshihiko Yamada, Takushi Fujioka, Yoichi Tanabe, Masaki Yamada, Hidetaka Terakubo, Yoshitaka Kitajima
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Publication number: 20090173817Abstract: An axial air-gap electronic motor has a teeth surface of a stator and a magnet surface of a rotor arranged opposedly along an axis line direction of an output shaft of the rotor with a predetermined gap being provided therebetween. The stator has a plurality of core members connected in a ring form. In manufacturing the electronic motor, after the teeth surfaces of the core members are arranged so as to face to each other and a dummy member is arranged between predetermined core members, a coil is wound from one end side toward the other end side of the core members continuously without being cut, and a coil of a length corresponding to a transition wire set between the core members is wound on the dummy member.Type: ApplicationFiled: March 12, 2009Publication date: July 9, 2009Applicant: FUJITSU GENERAL LIMITEDInventors: Tomonori Kojima, Toshiaki Tanno, Yoshikazu Tanaka, Yoichi Tanabe, Hirokazu Matsuzaki, Masaki Yamada, Masanori Murakami
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Patent number: 7554226Abstract: A magnetic pre-pressurizing section for pre-pressurizing the inner ring of the bearing in the axial direction by a difference of magnetic forces of permanent magnets of the two rotors is arranged. The magnetic pre-pressurizing section is constructed by a difference of a magnetizing amount for forming permanent magnets 8b, 9b arranged in the respective rotors. The magnetic pre-pressurizing section is also constructed by a difference of distances of an air gap L1 of a stator 2 and a permanent magnet 8b1, and an air gap L2 of the stator 2 and a permanent magnet 9b1. The magnetic pre-pressurizing section is also constructed by a difference of thicknesses of the rotating axis direction of a permanent magnet 8b1 and a permanent magnet 9b2 arranged in the respective rotors.Type: GrantFiled: June 2, 2006Date of Patent: June 30, 2009Assignee: Fujitsu General LimitedInventors: Tomonori Kojima, Atsushi Itagaki, Masanori Murakami, Yoichi Tanabe, Toshiaki Tanno, Hirokazu Matsuzaki, Masaki Yamada
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Patent number: 7531937Abstract: In an axial air-gap electronic motor in which a teeth surface of a stator and a magnet surface of a rotor are arranged opposedly along the axis line direction of an output shaft of the rotor with a predetermined gap being provided therebetween, the stator has a plurality of core members connected in a ring form with the axis line being a center, and each of the core members is provided with a connecting device for connecting the teeth surfaces to each other in an opposed state. In order to shorten the wire winding time and reduce the assembling manpower for the core members, a stator is formed by connecting a plurality of core members in a ring form with the axis line being a center, and locking ribs are provided as connecting devices for connecting the core members to each other in a rod form along the axis line direction.Type: GrantFiled: January 23, 2006Date of Patent: May 12, 2009Assignee: Fujitsu General LimitedInventors: Tomonori Kojima, Toshiaki Tanno, Yoshikazu Tanaka, Yoichi Tanabe, Hirokazu Matsuzaki, Masaki Yamada, Masanori Murakami
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Patent number: 7508796Abstract: In a baseband processing unit in a node-B, a path search circuit includes a path capture unit, path track transfer unit, and channel estimation unit, all of which are primarily provided for the path capture, channel estimation, and RAKE combination. In the baseband processing unit, a synchronization determination circuit includes a decoding unit provided for decoding RAKE-combined data and calculating an average SIR per wireless frame and a correction calculation unit primarily provided for reliably and stably detecting wireless frame synchronization. The processing time required to detect synchronization establishment during wireless frame synchronization determination is shortened.Type: GrantFiled: July 28, 2003Date of Patent: March 24, 2009Assignee: NEC CorporationInventor: Yoichi Tanabe
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Publication number: 20080191562Abstract: An axial air gap type electric motor realizes a torque up without an increase of the size of the electric motor. In the axial air gap type electric motor including a stator and two rotors each of which is molded almost with a discoid shape and which are arranged as facing one another on a common rotation axle with a fixed gap therebetween, the stator has a stator core including 3n (n indicates an integer of 2 or higher) pole members, and the pole members with three-phase configuration are connected in parallel. The rotors are formed with multiple magnets molded like a ring at an equal interval at positions facing the annular stator core when facing the stator, and the ratio of the number of the pole members and the number of the magnets becomes 3n:4n (wherein n indicates an integer of 2 or higher).Type: ApplicationFiled: November 14, 2007Publication date: August 14, 2008Inventors: Tomonori Kojima, Toshiaki Tanno, Ken Maeyama, Hirokazu Matsuzaki, Yoichi Tanabe
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Publication number: 20070262674Abstract: In an electric rotary machine, a stator, a metallic supporting member configured to support the stator, and a rotor are provided, the rotor is relatively rotatably supported with respect to the stator, a magnetic path is formed via a gap portion between the stator and the rotor to give a torque to the rotor, and a space section is provided to interrupt the magnetic path at a position of the metallic supporting member near to a magnetic pole of the stator facing the gap portion.Type: ApplicationFiled: May 8, 2007Publication date: November 15, 2007Inventors: Yuichi Shibukawa, Kenta Suzuki, Kenji Narita, Takashi Suzuki, Takushi Fujioka, Tomonori Kojima, Masanori Murakami, Yoichi Tanabe, Masaki Yamada
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Patent number: 7221073Abstract: An axial gap electronic motor includes a stator and a rotor disposed opposingly with a predetermined gap. In order to provide an easy assembling operation of the stator, the stator includes a plurality of pole members annularly connectable. The annular stator core is obtained by connecting each of the pole members to which coil winding is previously applied.Type: GrantFiled: February 23, 2004Date of Patent: May 22, 2007Assignee: Fujitsu General LimitedInventors: Shinichi Yamada, Hisao Igarashi, Tomonori Kojima, Takayuki Shinohara, Hidetaka Terakubo, Tomohiro Kashiwagi, Takushi Fujioka, Yoichi Tanabe, Masaki Yamada
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Publication number: 20060279150Abstract: A magnetic pre-pressurizing section for pre-pressurizing the inner ring of the bearing in the axial direction by a difference of magnetic forces of permanent magnets of the two rotors is arranged. The magnetic pre-pressurizing section is constructed by a difference of a magnetizing amount for forming permanent magnets 8b, 9b arranged in the respective rotors. The magnetic pre-pressurizing section is also constructed by a difference of distances of an air gap L1 of a stator 2 and a permanent magnet 8b1, and an air gap L2 of the stator 2 and a permanent magnet 9b1. The magnetic pre-pressurizing section is also constructed by a difference of thicknesses of the rotating axis direction of a permanent magnet 8b1 and a permanent magnet 9b2 arranged in the respective rotors.Type: ApplicationFiled: June 2, 2006Publication date: December 14, 2006Applicant: FUJITSU GENERAL LIMITEDInventors: Tomonori Kojima, Atsushi Itagaki, Masanori Murakami, Yoichi Tanabe, Toshiaki Tanno, Hirokazu Matsuzaki, Masaki Yamada
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Patent number: 7146167Abstract: A non-instantaneous-disruption hard handover (HHO) control device includes a CFN generation block (110) for monitoring the state of a source baseband resource (201a) and a destination baseband resource (201b), generating a CFN which autonomously configures a switch timing so as to enable non-instantaneous-disruption HHO, transferring CFN information to the source baseband resource (201a) and destination baseband resource (201b). The device further includes HHO-information write-in/read-in blocks (205a, 205b) for writing radio information of the source baseband resource (201a), transferring the radio information to the destination baseband resource (201b), and enabling continuous communication by using the radio information.Type: GrantFiled: August 22, 2003Date of Patent: December 5, 2006Assignee: NEC CorporationInventor: Yoichi Tanabe
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Patent number: 7135800Abstract: An axial gap electronic motor includes a stator having a plurality of poles, and a rotor. Each pole is formed of a stator iron core made of a magnet body and a coil wound therearound. The rotor has a plurality of poles formed of permanent magnet and arranged along a rotation axis direction of said rotor with a predetermined gap provided therebetween. The stator has a magnetic force generating section in which a plurality of the stator iron cores is arranged in a ring shape on a concentric circle with the rotation axis line of the rotor being a center axis. Each of teeth of the stator iron core is provided with a skew.Type: GrantFiled: December 14, 2004Date of Patent: November 14, 2006Assignee: Fujitsu General LimitedInventors: Masaki Yamada, Hisao Igarashi, Kenji Narita, Takushi Fujioka, Tomonori Kojima, Shinichiro Katagiri, Shinichi Yamada, Yoichi Tanabe, Hidetaka Terakubo, Takayuki Shinohara
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Publication number: 20060163964Abstract: In an axial air-gap electronic motor in which a teeth surface of a stator and a magnet surface of a rotor are arranged opposedly along the axis line direction of an output shaft of the rotor with a predetermined gap being provided therebetween, the stator has a plurality of core members connected in a ring form with the axis line being a center, and each of the core members is provided with a connecting means for connecting the teeth surfaces to each other in an opposed state. The present invention provides an assembling technique for an axial air-gap electronic motor capable of shortening the wire winding time and reducing the assembling manpower for the core members. A stator 2 is formed by connecting a plurality of core members 21a to 21i in a ring form with the axis line being a center, and locking ribs 54 and 55 are provided as connecting means for connecting the core members 21a to 21i to each other in a rod form along the axis line direction.Type: ApplicationFiled: January 23, 2006Publication date: July 27, 2006Applicant: FUJITSU GENERAL LIMITEDInventors: Tomonori Kojima, Toshiaki Tanno, Yoshikazu Tanaka, Yoichi Tanabe, Hirokazu Matsuzaki, Masaki Yamada, Masanori Murakami
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Publication number: 20060120325Abstract: A non-instantaneous-disruption hard handover (HHO) control device includes a CFN generation block (110) for monitoring the state of a source baseband resource (201a) and a destination baseband resource (201b), generating a CFN which autonomously configures a switch timing so as to enable non-instantaneous-disruption HHO, transferring CFN information to the source baseband resource (201a) and destination baseband resource (201b). The device further includes HHO-information write-in/read-in blocks (205a, 205b) for writing radio information of the source baseband resource (201a), transferring the radio information to the destination baseband resource (201b), and enabling continuous communication by using the radio information.Type: ApplicationFiled: August 22, 2003Publication date: June 8, 2006Inventor: Yoichi Tanabe