Patents by Inventor Shinichi Mukoyama
Shinichi Mukoyama 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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Patent number: 9728950Abstract: A cryogenic cable termination connector having a small heat inflow from the outside and stable electrical insulation properties. The cryogenic cable termination connector includes a lead-out conductor led out from a site at a very low temperature to a site at room temperature via a liquid refrigerant layer, a refrigerant gas layer, and an oil layer. The lead-out conductor includes a capacitor-cone insulator in which plural metal foils for dividing an electric field from a high voltage level down to the ground voltage level are stacked through an insulator. Among electric field tilting portions in which voltage changes gradually from the high voltage level to the ground voltage level, an electric field tilting portion positioned at a lower part is located in the liquid refrigerant layer and an electric field tilting portion positioned at an upper part is located in the oil layer.Type: GrantFiled: January 31, 2011Date of Patent: August 8, 2017Assignee: FURUKAWA ELECTRIC CO., LTD.Inventors: Shinichi Mukoyama, Tokui Yonemura, Shuka Yonemura, Masashi Yagi, Tomoya Nomura
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Patent number: 9570214Abstract: In a superconducting cable line in which a superconducting cable is connected to a terminal connecting part or an intermediate connecting part, an offset part in which a superconducting cable is laid in a curved-shape is provided near the terminal connecting part or the intermediate connecting part. Further, when it is assumed that the superconducting cable is movable in the offset part, an external tube of the superconducting cable is fixed such that a maximum amplitude part which maximizes the amount of movement of the superconducting cable following thermal expansion and contraction of a cable core becomes immovable.Type: GrantFiled: February 7, 2012Date of Patent: February 14, 2017Assignee: FURUKAWA ELECTRIC CO., LTD.Inventors: Masashi Yagi, Shinichi Mukoyama, Tokui Yonemura, Shuka Yonemura, Tomoya Nomura
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Patent number: 9251932Abstract: A terminal connecting part has: a low temperature container filled with a cooling medium; a conductor current lead which has one end immersed in the cooling medium and the other end led to a normal temperature part; and a conductor movable connecting terminal which electrically connects a superconductive conductor layer and the conductor current lead of a superconducting cable. The superconductive conductor layer of the superconducting cable stripped stepwise from a front end is connected to the conductor current lead through the conductor movable connecting terminal. The cable core of the superconducting cable is movable in a longitudinal direction and is rotatable in a circumferential direction while maintaining electrical connection between the superconductive conductor layer and the conductor current lead. The cable core is horizontally supported in the low temperature container.Type: GrantFiled: January 26, 2012Date of Patent: February 2, 2016Assignee: FURUKAWA ELECTRIC CO., LTD.Inventors: Masashi Yagi, Takaharu Mitsuhashi, Tomoya Nomura, Shinichi Mukoyama, Hirao Hirata, Tokui Yonemura, Shuka Yonemura
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Patent number: 9070494Abstract: A fixation structure for fixing a superconducting cable including a cable core and a thermal insulation tube. The fixation structure includes a fixation box connected to the thermal insulation tube, including a hollow thermal insulation structure, and through which the cable core is passed, a fixation body for fixing the cable core on the inner wall of the fixation box, and a diameter-expanded reinforcement layer that is an electrical insulation layer that has a diameter decreasing toward both ends and is formed on the cable core. A refrigerant flows through the inside of the inner wall of the fixation box. The cable core is fixed on the inner wall with the fixation body through the diameter-expanded reinforcement layer. The structure implements a simple and low-cost fixation structure appropriate for an electric field design.Type: GrantFiled: March 16, 2012Date of Patent: June 30, 2015Assignee: FURUKAWA ELECTRIC CO., LTD.Inventors: Jun Teng, Masashi Yagi, Taro Matsuoka, Shinichi Mukoyama, Shuka Yonemura
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Patent number: 9006146Abstract: An AC superconducting cable with an insulating layer on the external circumference of a conductor, and wherein: the insulating layer includes a first insulating layer, a second insulating layer and a third insulating layer, from the inside layer to the outside layer; the insulating layer is impregnated with liquid nitrogen; the product of the dielectric constant ?1 of the first insulating layer and the dielectric loss tangent tan ?1 and the product of the dielectric constant ?2 of the second insulating layer and the dielectric loss tangent tan ?2 fulfilling the relationship ?1×tan ?1>?2×tan ?2; and the product of the dielectric constant ?2 of the second insulating layer and the dielectric loss tangent tan ?2 and the product of the dielectric constant ?3 of the third insulating layer and the dielectric loss tangent tan ?3 fulfilling the relationship ?2×tan ?2<?3×tan ?3.Type: GrantFiled: May 9, 2011Date of Patent: April 14, 2015Assignees: Furukawa Electric Co., Ltd., International Superconductivity Technology CenterInventors: Shinichi Mukoyama, Masashi Yagi, Tomoya Nomura, Shuka Yonemura
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Patent number: 9008739Abstract: In a terminal structure of a superconducting cable conductor, a terminal portion of the superconducting cable conductor is connected with a terminal member of a good conductor. The terminal portion includes a superconducting layer disposed on an outer periphery of a central support; and an insulating layer surrounding the superconducting layer. The insulating layer and the superconducting layer are partially removed to expose the central support and the superconducting layer in this order from an end of the superconducting cable conductor. The terminal member includes a metal sleeve which includes a first cylindrical portion whose inner surface is in close contact with an exposed portion of the central support; a second cylindrical portion which is soldered around an exposed portion of the superconducting layer; and a third cylindrical portion into which the insulating layer is inserted.Type: GrantFiled: May 30, 2011Date of Patent: April 14, 2015Assignee: Furukawa Electric Co., Ltd.Inventors: Shinichi Mukoyama, Masashi Yagi, Tomoya Nomura, Shuka Yonemura
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Publication number: 20130199821Abstract: A fixation structure for fixing a superconducting cable including a cable core and a thermal insulation tube. The fixation structure includes a fixation box connected to the thermal insulation tube, including a hollow thermal insulation structure, and through which the cable core is passed, a fixation body for fixing the cable core on the inner wall of the fixation box, and a diameter-expanded reinforcement layer that is an electrical insulation layer that has a diameter decreasing toward both ends and is formed on the cable core. A refrigerant flows through the inside of the inner wall of the fixation box. The cable core is fixed on the inner wall with the fixation body through the diameter-expanded reinforcement layer. The structure implements a simple and low-cost fixation structure appropriate for an electric field design.Type: ApplicationFiled: March 16, 2012Publication date: August 8, 2013Applicant: FURUKAWA ELECTRIC CO., LTD.Inventors: Jun Teng, Masashi Yagi, Taro Matsuoka, Shinichi Mukoyama, Shuka Yonemura
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Publication number: 20130196857Abstract: An AC superconducting cable with an insulating layer on the external circumference of a conductor, and wherein: the insulating layer includes a first insulating layer, a second insulating layer and a third insulating layer, from the inside layer to the outside layer; the insulating layer is impregnated with liquid nitrogen; the product of the dielectric constant ?1 of the first insulating layer and the dielectric loss tangent tan ?1 and the product of the dielectric constant ?2 of the second insulating layer and the dielectric loss tangent tan ?2 fulfilling the relationship ?1×tan ?1>?2×tan ?2; and the product of the dielectric constant ?2 of the second insulating layer and the dielectric loss tangent tan ?2 and the product of the dielectric constant ?3 of the third insulating layer and the dielectric loss tangent tan ?3 fulfilling the relationship ?2×tan ?2<?3×tan ?3.Type: ApplicationFiled: May 9, 2011Publication date: August 1, 2013Applicants: INTERNATIONAL SUPERCONDUCTIVITY TECHNOLOGY CENTER, FURUKAWA ELECTRIC CO., LTD.Inventors: Shinichi Mukoyama, Masashi Yagi, Tomoya Nomura, Shuka Yonemura
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Publication number: 20130165326Abstract: In a superconducting cable line in which a superconducting cable is connected to a terminal connecting part or an intermediate connecting part, an offset part in which a superconducting cable is laid in a curved-shape is provided near the terminal connecting part or the intermediate connecting part. Further, when it is assumed that the superconducting cable is movable in the offset part, an external tube of the superconducting cable is fixed such that a maximum amplitude part which maximizes the amount of movement of the superconducting cable following thermal expansion and contraction of a cable core becomes immovable.Type: ApplicationFiled: February 7, 2012Publication date: June 27, 2013Applicants: INTERNATIONAL SUPERCONDUCTIVITY TECHNOLOGY CENTER, FURUKAWA ELECTRIC CO., LTD.Inventors: Masashi Yagi, Shinichi Mukoyama, Tomoya Nomura, Shuka Yonemura
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Publication number: 20130102474Abstract: In a terminal structure of a superconducting cable conductor, a terminal portion of the superconducting cable conductor is connected with a terminal member of a good conductor. The terminal portion includes a superconducting layer disposed on an outer periphery of a central support; and an insulating layer surrounding the superconducting layer. The insulating layer and the superconducting layer are partially removed to expose the central support and the superconducting layer in this order from an end of the superconducting cable conductor. The terminal member includes a metal sleeve which includes a first cylindrical portion whose inner surface is in close contact with an exposed portion of the central support; a second cylindrical portion which is soldered around an exposed portion of the superconducting layer; and a third cylindrical portion into which the insulating layer is inserted.Type: ApplicationFiled: May 30, 2011Publication date: April 25, 2013Applicant: FURUKAWA ELECTRIC CO., LTD.Inventors: Shinichi Mukoyama, Masashi Yagi, Tomoya Nomura, Shuka Yonemura
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Publication number: 20130059463Abstract: A cryogenic cable termination connector having a small heat inflow from the outside and stable electrical insulation properties. The cryogenic cable termination connector includes a lead-out conductor led out from a site at a very low temperature to a site at room temperature via a liquid refrigerant layer, a refrigerant gas layer, and an oil layer. The lead-out conductor includes a capacitor-cone insulator in which plural metal foils for dividing an electric field from a high voltage level down to the ground voltage level are stacked through an insulator. Among electric field tilting portions in which voltage changes gradually from the high voltage level to the ground voltage level, an electric field tilting portion positioned at a lower part is located in the liquid refrigerant layer and an electric field tilting portion positioned at an upper part is located in the oil layer.Type: ApplicationFiled: January 31, 2011Publication date: March 7, 2013Applicants: International Superconductivity Technology Center, the Judicial Foundation, FURUKAWA ELECTRIC CO., LTD.Inventors: Shinichi Mukoyama, Masashi Yagi, Tomoya Nomura, Shuka Yonemura
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Patent number: 8290555Abstract: A superconducting wire having at least a superconducting thin film and a stabilizing film formed one on top of another in order on a substrate having a predetermined width and a predetermined length, the superconducting wire having at least one cut made along a direction of the length of the superconducting wire, the superconducting wire being bendable at the cut in a width direction.Type: GrantFiled: January 23, 2009Date of Patent: October 16, 2012Assignees: The Furukawa Electric Co., Ltd., International Superconductivity Technology Center, the Juridical Foundation, National University Corporation Yokohama National UniversityInventors: Masashi Yagi, Shinichi Mukoyama, Yuh Shiohara, Teruo Izumi, Naoyuki Amemiya
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Patent number: 8260388Abstract: A current terminal structure of a superconductor has a former, and a superconducting wire wound around the former in one or more layers and including a substrate and a superconducting layer formed on the substrate. A first layer superconducting wire wound around immediately above the former is arranged so that a substrate side thereof becomes outside and a superconducting layer side thereof becomes inside. A surface of the superconducting layer at an end of the first layer superconducting wire, which is directed toward the inside, and part of a surface of the superconducting layer of a connection superconducting wire, which is directed toward the outside, are faced and connected to each other.Type: GrantFiled: September 23, 2011Date of Patent: September 4, 2012Assignees: International Superconductivity Technology Center, Furukawa Electric Co., LtdInventors: Masashi Yagi, Hirao Hirata, Mitsuo Suzuki, Shinichi Mukoyama, Yuh Shiohara
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Patent number: 8188010Abstract: A thin film superconductive wire material (16) and an electro conductive tape (15) are immersed in a solder bath (35) containing a solder, which includes Sn(tin) and Bi (bismuth), to bond the thin film superconductive wire material (16) and the electro conductive tape (15) and a composite superconductive wire material (10) is formed.Type: GrantFiled: February 2, 2009Date of Patent: May 29, 2012Assignees: The Furukawa Electric Co., Ltd., International Superconductivity Center, The Juridical FoundationInventors: Masashi Yagi, Hirao Hirata, Shinichi Mukoyama, Yuh Shiohara
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Publication number: 20120015816Abstract: A current terminal structure of a superconductor has a former, and a superconducting wire wound around the former in one or more layers and including a substrate and a superconducting layer formed on the substrate. A first layer superconducting wire wound around immediately above the former is arranged so that a substrate side thereof becomes outside and a superconducting layer side thereof becomes inside. A surface of the superconducting layer at an end of the first layer superconducting wire, which is directed toward the inside, and part of a surface of the superconducting layer of a connection superconducting wire, which is directed toward the outside, are faced and connected to each other.Type: ApplicationFiled: September 23, 2011Publication date: January 19, 2012Applicants: INTERNATIONAL SUPERCONDUCTIVITY TECHNOLOGY CENTER, FURUKAWA ELECTRIC CO., LTDInventors: Masashi Yagi, Hirao Hirata, Mitsuo Suzuki, Shinichi Mukoyama, Yuh Shiohara
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Publication number: 20090233799Abstract: A thin film superconductive wire material (16) and an electro conductive tape (15) are immersed in a solder bath (35) containing a solder, which includes Sn(tin) and Bi(bismuth), to bond the thin film superconductive wire material (16) and the electro conductive tape (15) and a composite superconductive wire material (10) is formed.Type: ApplicationFiled: February 2, 2009Publication date: September 17, 2009Applicants: THE FURUKAWA ELECTRIC CO., LTD., Int. Superconductivity Tech Ctr the Juridical Fdn.Inventors: Masashi YAGI, Hirao Hirata, Shinichi Mukoyama, Yuh Shiohara
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Publication number: 20090221427Abstract: A superconducting wire having at least a superconducting thin film and a stabilizing film formed one on top of another in order on a substrate having a predetermined width and a predetermined length, the superconducting wire having at least one cut made along a direction of the length of the superconducting wire, the superconducting wire being bendable at the cut in a width direction.Type: ApplicationFiled: January 23, 2009Publication date: September 3, 2009Applicants: THE FURUKAWA ELECTRIC CO., LTD., Int'l Superconductivity Tech Ctr, Juridical Fdn., National University Corp YOKOHAMA NATL. UNIVInventors: Masashi YAGI, Shinichi MUKOYAMA, Yuh SHIOHARA, Teruo IZUMI, Naoyuki AMEMIYA
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Publication number: 20080202127Abstract: A cooling system for a superconducting power apparatus including a reservoir tank for reserving a liquefied gas, a circulating pump, a heat exchanger for cooling the liquefied gas, and a circulation loop through which the liquefied gas is circulated, the superconducting power apparatus being cooled by circulating the liquefied gas in a subcooled state using the circulating pump. The cooling system further includes a pressurizing mechanism for pressurizing the liquefied gas in the reservoir tank with the same type of gas as the liquefied gas, wherein a liquid level in the reservoir tank for reserving the liquefied gas in a pressurized state is located above an outlet of a return piping of a circulating liquefied gas at least by a dissolving depth of the pressurizing gas+(plus) a liquid level movement correction amount.Type: ApplicationFiled: June 15, 2005Publication date: August 28, 2008Applicants: The Furukawa Electric Co, Ltd., Central Research Institute of Electric Power Ind.Inventors: Shinichi Mukoyama, Noboru Ishii, Masashi Yagi, Satoru Maruyama, Tatsuki Okamoto, Hiroshi Suzuki, Michiharu Ichikawa, Toshihiro Takahashi, Shirabe Akita
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Patent number: 7301323Abstract: When supplying electric power to a superconducting cable including a superconducting shield covering a superconductive conductor, a phase A of a current generated by a magnetic field leaking from the superconducting shield and a phase B of a current passing through the superconductive conductor are detected, and a phase difference between the phase A and the phase B is obtained so as to determine that a quench has occurred in the case where a difference between a reference phase difference and the obtained current phase difference exceeds a threshold.Type: GrantFiled: September 5, 2006Date of Patent: November 27, 2007Assignees: Central Research Institute of Electric Power Industry, The Furukawa Electric Co., Ltd.Inventors: Michiharu Ichikawa, Hiroshi Suzuki, Toshihiro Takahashi, Shinichi Mukoyama, Masashi Yagi
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Publication number: 20070053116Abstract: When supplying electric power to a superconducting cable including a superconducting shield covering a superconductive conductor, a phase A of a current generated by a magnetic field leaking from the superconducting shield and a phase B of a current passing through the superconductive conductor are detected, and a phase difference between the phase A and the phase B is obtained so as to determine that a quench has occurred in the case where a difference between a reference phase difference and the obtained current phase difference exceeds a threshold.Type: ApplicationFiled: September 5, 2006Publication date: March 8, 2007Inventors: Michiharu Ichikawa, Hiroshi Suzuki, Toshihiro Takahashi, Shinichi Mukoyama, Masashi Yagi