Patents by Inventor Takushi Fujioka
Takushi Fujioka 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: 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: 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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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: 20050140244Abstract: There is provided an axial gap electronic motor capable of decreasing cogging torque and thus decreasing vibrations and noise. A stator of the motor has a magnetic force generating section 21 in which a plurality of stator iron cores 24 are arranged in a ring shape, and teeth 25 of each of the stator iron cores 24 are provided with a skew 26 inclined through a predetermined angle with respect to the radial direction of the rotors 31, 32.Type: ApplicationFiled: December 14, 2004Publication date: June 30, 2005Applicant: 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: 20050140233Abstract: There is provided, at a low cost, an air blower apparatus capable of increasing the air blowing capability without an increase in size of an electronic motor, and having a high assembling ability. An electronic motor 3 is an axial gap electronic motor in which a rotor 32 and a stator 31 of the electronic motor are arranged opposedly with a predetermined gap along the rotation axis direction of the rotor, and coaxially supports an air blowing fan 2 on an attaching surface of the rotor 32 opposite to the stator.Type: ApplicationFiled: December 3, 2004Publication date: June 30, 2005Applicant: FUJITSU GENERAL LIMITEDInventors: Tomonori Kojima, Hisao Igarashi, Takushi Fujioka, Yoichi Tanabe, Hidetaka Terakubo, Takayuki Shinohara, Tomohiro Kashiwagi, Masaki Yamada
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Patent number: 6819026Abstract: A radial-air-gap induction motor is constituted so as to have two air gaps by setting a rotor between a cylindrical outer stator and inner stator in order to improve an efficiency by increasing the ratio of torque/(square of current) by a two air gaps, apply windings for generating a rotating magnetic field to the outer and inner stators, and form squirrel-cage windings on the rotor.Type: GrantFiled: April 15, 2003Date of Patent: November 16, 2004Assignee: Fujitsu General LimitedInventors: Kenji Narita, Takushi Fujioka, Yusuke Kikuchi, Akihiro Ito, Youichi Tanabe, Yuji Souma, Ken Maeyama, Michihiro Shibamoto, Nopporn Jirojjaturonn, Chanaporn Thanathitipong
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Patent number: 6809453Abstract: In an axial-air-gap induction motor which has a disk-shaped stator and rotor placed coaxially around a rotating shaft with their surfaces opposing each other across a predetermined gap, the stator and rotor are each composed of a disk-shaped yoke and teeth fitted and secured in the yoke, making it easy to fasten the stator to the bracket, and the rotor to the rotating shaft, as well as to mount windings in the stator core and rotor core.Type: GrantFiled: July 10, 2003Date of Patent: October 26, 2004Assignee: Fujitsu General LimitedInventors: Kenji Narita, Takushi Fujioka, Youichi Tanabe, Nopporn Jirojjaturonn, Chanaporn Thanathitipong, Akihiro Ito, Michihiro Shibamoto
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Publication number: 20040164641Abstract: In order to make it possible to perform an assembling operation of a stator of an axial gap electronic motor, including a connecting wire settlement and the like, a stator core 5 includes a plurality of pole members 5a to 5l annularly connectable, and the annular stator core 5 is obtained by connecting each of the pole members 5a to 5l to which coil winding is previously applied.Type: ApplicationFiled: February 23, 2004Publication date: August 26, 2004Applicant: 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: 20040061396Abstract: In an axial-air-gap induction motor which has a disk-shaped stator and rotor placed coaxially around a rotating shaft with their surfaces opposing each other across a predetermined gap, the stator and rotor are each composed of a disk-shaped yoke and teeth fitted and secured in the yoke, making it easy to fasten the stator to the bracket, and the rotor to the rotating shaft, as well as to mount windings in the stator core and rotor core.Type: ApplicationFiled: July 10, 2003Publication date: April 1, 2004Applicant: Fujitsu General LimitedInventors: Kenji Narita, Takushi Fujioka, Youichi Tanabe, Nopporn Jirojjaturonn, Chanaporn Thanathitipong, Akihiro Ito, Michihiro Shibamoto
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Publication number: 20030201686Abstract: A radial-air-gap induction motor is constituted so as to have a tow-layer air gap by setting a rotor between a cylindrical outer stator and inner stator in order to improve an efficiency by increasing the ratio of torque/(square of current) by a two-layer air-gap structure, apply a winding for generating a rotating magnetic field to the outer and inner stators, and form a squirrel-cage winding on the rotor.Type: ApplicationFiled: April 15, 2003Publication date: October 30, 2003Applicant: FUJITSU GENERAL LIMITEDInventors: Kenji Narita, Takushi Fujioka, Yusuke Kikuchi, Akihiro Ito, Youichi Tanabe, Yuji Souma, Ken Maeyama, Michihiro Shibamoto, Nopporn Jirojjaturonn, Chanaporn Thanathitipong