Patents by Inventor Takeshi Obata
Takeshi Obata 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: 11953882Abstract: A production system, comprising: a first industrial machine configured to control a second industrial machine based on each of a plurality of variables; and circuitry configured to input, to the first industrial machine, a control command relating to an operation of at least one of the first industrial machine or the second industrial machine, wherein the first industrial machine rewrites, based on the control command, at least one variable defined as a rewritable variable among the plurality of variables.Type: GrantFiled: March 11, 2021Date of Patent: April 9, 2024Assignee: KABUSHIKI KAISHA YASKAWA DENKIInventors: Takeshi Nagata, Takahiko Suzuki, Shinichiro Obata
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Patent number: 9810588Abstract: An optical fiber temperature sensor implements a temperature monitoring function in an interphase insulating material between sandwich bus bars. The optical fiber temperature sensor is formed by housing an optical fiber cable in a housing formed from an ultra-thin sheet made from an insulating material having insulation quality equal to or higher than interphase insulating material between sandwich bus bars. Multiple ultra-thin columnar members, each made from same material as is housing, are housed in multiple locations in housing. Multiple sensor rings are each formed by unfixedly winding a portion of optical fiber cable with a length equal to or longer than that corresponding to range resolution around corresponding one of ultra-thin columnar members. The multiple sensor rings measure temperatures in multiple locations. Silicone sealing is applied to housing side surfaces. All surfaces of housing are sealed with a hermetic sealing member made from a silicone-based liquid insulating material.Type: GrantFiled: June 6, 2012Date of Patent: November 7, 2017Assignees: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION, KITASHIBA ELECTRIC CO., LTD.Inventors: Eiji Hashimoto, Koji Dojo, Takeshi Obata
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Publication number: 20150285692Abstract: An optical fiber temperature sensor implements a temperature monitoring function in an interphase insulating material between sandwich bus bars. The optical fiber temperature sensor is formed by housing an optical fiber cable in a housing formed from an ultra-thin sheet made from an insulating material having insulation quality equal to or higher than interphase insulating material between sandwich bus bars. Multiple ultra-thin columnar members, each made from same material as is housing, are housed in multiple locations in housing. Multiple sensor rings are each formed by unfixedly winding a portion of optical fiber cable with a length equal to or longer than that corresponding to range resolution around corresponding one of ultra-thin columnar members. The multiple sensor rings measure temperatures in multiple locations. Silicone sealing is applied to housing side surfaces. All surfaces of housing are sealed with a hermetic sealing member made from a silicone-based liquid insulating material.Type: ApplicationFiled: June 6, 2012Publication date: October 8, 2015Applicants: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION, KITASHIBA ELECTRIC CO., LTD.Inventors: Eiji Hashimoto, Koji Dojo, Takeshi Obata
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Publication number: 20140354298Abstract: Apparatus and method for partial discharge detection of turn-to-turn insulation in motor has a surge generator for generating a surge voltage to the windings of the motor by applying a pulse voltage, and a partial discharge current detector for detecting partial discharge currents between the winding turns of the motor. The surge generator generates in and between the windings of the motor the surge voltage that has the rise time and fall time corresponding to the rise time of the surge voltage observed at the motor terminal when the motor is driven by an inverter, and that is repeated at a frequency of 50 Hz to 20 kHz.Type: ApplicationFiled: August 20, 2014Publication date: December 4, 2014Inventors: Kouji Obata, Keiji Fukushi, Takeshi Obata, Koichiro Saito, Tadahiro Shimozono
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Patent number: 8816694Abstract: Apparatus and method for partial discharge detection of turn-to-turn insulation in motor has a surge generator for generating a surge voltage to the windings of the motor by applying a pulse voltage, and a partial discharge current detector for detecting partial discharge currents between the winding turns of the motor. The surge generator generates in and between the windings of the motor the surge voltage that has the rise time and fall time corresponding to the rise time of the surge voltage observed at the motor terminal when the motor is driven by an inverter, and that is repeated at a frequency of 50 Hz to 20 kHz.Type: GrantFiled: July 27, 2005Date of Patent: August 26, 2014Assignee: Hitachi Industrial Equipment Systems Co., Ltd.Inventors: Kouji Obata, Keiji Fukushi, Takeshi Obata, Koichiro Saito, Tadahiro Shimozono
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Patent number: 7898138Abstract: In a rotary electric machine, for enhancing the reliability and reducing the size thereof, the rotary electric machine comprises a stator, and a rotor opposed to the stator and adapted to be rotated around a shaft, the rotor having an iron core formed therein with a plurality of axial holes formed in the iron core, a plurality of conductor bars inserted respectively in the holes, and end rings provided at the end parts of the conductor bars, wherein the outer peripheral parts of the end rings are electrically and mechanically joined to the conductor bars through friction stir welding, and the one end part of the conductor bar is axially projected from the end ring. With this configuration, it is possible to enhance the capability of heat radiation from the rotary electric machine and to enhance the design freedom of component parts around the stator and the rotor.Type: GrantFiled: August 14, 2007Date of Patent: March 1, 2011Assignee: Hitachi Industrial Equipment Systems Co., Ltd.Inventors: Keiichiro Kaihatsu, Takeshi Obata, Kenichi Saito
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Patent number: 7752496Abstract: A log management module 10 acquires log data from a computer, temporarily stores the log data in a buffer, and writes the stored log data into a disk device 30a. When the log management module 10 detects a failure in the computer, the log management module 10 stops writing log data in the disk device 30a, and writes log data acquired after the failure is detected in a disk device 30b.Type: GrantFiled: July 25, 2005Date of Patent: July 6, 2010Assignee: Fujitsu LimitedInventors: Masahiro Yoshida, Takeshi Obata, Taichi Ohno
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Patent number: 7700211Abstract: An adhesion layer containing a second solid polymer electrolyte is disposed between a solid polymer electrolyte membrane and a fuel electrode and/or an oxidant electrode containing a first solid polymer electrolyte and a catalyst substance. The solid polymer electrolyte membrane and the adhesion layer are made of the same solid polymer electrolyte. In this manner, the adhesion at the interface between the electrode surface and the solid polymer electrolyte membrane is enhanced to implement the elevation of the cell characteristics and the elevation of the reliability of the cell.Type: GrantFiled: October 18, 2004Date of Patent: April 20, 2010Assignee: NEC CorporationInventors: Shin Nakamura, Yoshimi Kubo, Yuichi Shimakawa, Takashi Manako, Hidekazu Kimura, Hideto Imai, Sadanori Kuroshima, Tsutomu Yoshitake, Takeshi Obata
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Patent number: 7663337Abstract: A frequency converter for outputting a power to drive a motor, having: an inverter unit for inverting a d.c. power to an a.c. power; a control unit for controlling the inverter unit; and a housing for supporting at least the inverter unit and control unit, wherein a rise time change unit is provided in the housing, the rise time change unit changes a rise time of a waveform of a voltage output from the inverter unit.Type: GrantFiled: January 15, 2009Date of Patent: February 16, 2010Assignee: Hitachi Industrial Equipment System Co.Inventors: Tadahiro Shimozono, Takeshi Obata, Koichiro Saito, Osamu Matsumoto, Kouji Obata
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Patent number: 7659651Abstract: A rotating electric machine includes a stator core of a cylindrical shape, a rotor core coaxially rotating inside the stator core, and a plurality of coils each formed by winding magnet wires using a slot formed axially in either the stator core or the rotor core, or both: it is preferable that each of the coils be split into a plurality of coil groups, that starting sections of winding of the magnet wires in one of the coil groups be wound adjacently to ending sections of winding of the magnet wires in another of the coil groups, and that the starting sections and ending sections of winding of the magnet wires in the two coil groups be connected at respective outgoing wire ends to one another, outside the slots.Type: GrantFiled: August 10, 2007Date of Patent: February 9, 2010Assignee: Hitachi, Ltd.Inventors: Koji Obata, Masaharu Senoo, Takeshi Obata, Akihiro Sekine, Mituru Itou, Takashi Yasuhara, Takayuki Koizumi
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Patent number: 7655343Abstract: A fuel cell (100) which has an electrode-electrolyte joined article (101) composed of a fuel electrode (102), an oxidizing agent electrode (108) and, sandwiched thereby, a solid polymer electrolyte (114), characterized in that a separation film (330) comprising a material exhibiting an oxygen/nitrogen separation factor of more than 1 is provided on the surface of an oxidizing agent electrode side current collector (110) constituting the oxidizing agent electrode (108). The fuel cell is a liquid fuel supply type of fuel cell which has a simple structure and also is capable of supplying satisfactory oxygen to an oxidizing agent electrode.Type: GrantFiled: September 19, 2003Date of Patent: February 2, 2010Assignee: NEC CorporationInventors: Takeshi Obata, Tsutomu Yoshitake, Yoshimi Kubo
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Publication number: 20090239114Abstract: A polymer electrolyte fuel cell which has a polymer electrolyte membrane, an anode disposed on one side of the polymer electrolyte membrane and a cathode disposed on the other side of the polymer electrolyte membrane, wherein an organic fuel is supplied to the anode, and wherein the anode has an anode catalyst layer containing a catalyst and a proton-conducting material, and the cathode has a cathode catalyst layer containing a catalyst, a proton-conducting material and an oxygen-permeating material.Type: ApplicationFiled: September 12, 2005Publication date: September 24, 2009Applicant: NEC CORPORATIONInventors: Yasutaka Kouno, Satoshi Tomoeda, Yoshimi Kubo, Tsutomu Yoshitake, Takeshi Obata
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Publication number: 20090136802Abstract: A solid polymer fuel cell includes: a membrane and electrode assembly in which a solid polymer electrolyte membrane is sandwiched between a fuel electrode and an oxidant electrode; an oxidant channel which is formed on an oxidant electrode side of the membrane and electrode assembly, and supplies oxidant to the oxidant electrode; and a water-repellent membrane which is formed between the oxidant electrode and the oxidant channel, and has a vapor permeation property. Thus, the solid polymer fuel cell is provided in which the disturbance of the oxidant gas supply that is caused by the deposition and contact of the droplet can be suppressed.Type: ApplicationFiled: April 13, 2007Publication date: May 28, 2009Applicant: NEC CORPORATIONInventors: Hideaki Sasaki, Takeshi Obata, Hidekazu Kimura, Suguru Watanabe
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Publication number: 20090121666Abstract: A frequency converter for outputting a power to drive a motor, having: an inverter unit for inverting a d.c. power to an a.c. power; a control unit for controlling the inverter unit; and a housing for supporting at least the inverter unit and control unit, wherein a rise time change unit is provided in the housing, the rise time change unit changes a rise time of a waveform of a voltage output from the inverter unit.Type: ApplicationFiled: January 15, 2009Publication date: May 14, 2009Inventors: Tadahiro SHIMOZONO, Takeshi OBATA, Koichiro SAITO, Osamu MATSUMOTO, Kouji OBATA
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Publication number: 20090117418Abstract: The present invention is a driving method of a fuel cell in which power is generated from a liquid fuel containing fuel and oxidant by a fuel cell main assembly 5. In order to suppress the degradation of the output characteristics after the stop and storage, a start-up operation S1 which is started after a stop state in which a load is not connected the fuel cell main assembly; a recovery operation S3 in which the liquid fuel is supplied to the fuel cell main assembly 5 such that an electrode of the fuel cell main assembly is reduced after the start-up operation S1; and a normal operation S4 in which the power is supplied to an external load 20.Type: ApplicationFiled: July 13, 2006Publication date: May 7, 2009Inventors: Takeshi Obata, Hideaki Sasaki, Yoshinori Watanabe, Shin Nakamura, Takashi Manako
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Publication number: 20090117419Abstract: Provided are a dry-state detecting method and an electronic device system for a fuel cell, which detect the dry state of an electrolyte film precisely, and a power control method for optimizing the control of a starting time on the basis of the dry state detected. The fuel cell is constituted to include an electrolyte film, and a catalyst electrode and a gas diffusion electrode disposed on the two faces of the electrolyte film. The dry-state detecting method detects the dry state on the basis of a displacement of the electrolyte film in an in-plane direction.Type: ApplicationFiled: October 25, 2006Publication date: May 7, 2009Applicants: NEC Corporation, NEC Personal ProductsInventors: Tsuyoshi Takemoto, Takahisa Kitaguchi, Yoshitaka Tokita, Toshimichi Kawai, Toshiaki Nakazawa, Takeshi Obata, Hiroshi Kajitani, Takashi Manako, Hidekazu Kimura, Shin Nakamura
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Patent number: 7511450Abstract: A frequency converter for outputting a power to drive a motor, having: an inverter unit for inverting a d.c. power to an a.c. power; a control unit for controlling the inverter unit; and a housing for supporting at least the inverter unit and control unit, wherein a rise time change unit is provided in the housing, the rise time change unit changes a rise time of a waveform of a voltage output from the inverter unit.Type: GrantFiled: October 31, 2007Date of Patent: March 31, 2009Assignee: Hitachi Industrial Equipment System Co., Ltd.Inventors: Tadahiro Shimozono, Takeshi Obata, Koichiro Saito, Osamu Matsumoto, Kouji Obata
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Publication number: 20090078528Abstract: A support member which is securely fixed to a truck frame is constituted by a tubular body portion and a lid portion. A couple of dry electromagnetic brakes are located in a brake accommodation room within the tubular body portion. The support member is assembled with an electric motor. A drum member which accommodates a planetary reduction gear mechanism is rotatably mounted on the outer periphery of the support member through bearings. A floating seal is provided between the support member and the drum member, and a seal ring (45) is provided between an axial bore in the support member and a coupling shaft. Thus, the two dry electromagnetic brakes are accommodated in the support member, safely shielded from lubricant oil.Type: ApplicationFiled: July 28, 2006Publication date: March 26, 2009Inventors: Nobuo Uzawa, Atsushi Tanaka, Masami Ochiai, Tadahiro Shimozono, Yoshiomi Jojima, Takeshi Obata
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Publication number: 20090061271Abstract: For the purpose of efficiently discharging CO2 generated therein while increasing the fuel utilization efficiency, a fuel cell comprises a solid polymer electrolyte membrane, a cathode arranged in contact with one side of the solid polymer electrolyte membrane, an anode arranged in contact with the other side of the solid polymer electrolyte membrane, a cathode collector and an anode collector respectively arranged in contact with the cathode and anode, a sealing member arranged in the rim of the solid polymer electrolyte membrane and sandwiched between the solid polymer electrolyte membrane and the anode collector, a fuel supply controlling membrane for vaporizing a liquid fuel and supplying the vaporized fuel to the anode, and a discharging unit for discharging a product produced by electrical reaction at the anode to the outside. An air vent formed in the sealing member serves as the discharging unit.Type: ApplicationFiled: May 1, 2006Publication date: March 5, 2009Applicant: NEC CORPORATIONInventors: Shouji Sekino, Kenji Kobayashi, Hideaki Sasaki, Takeshi Obata, Shin Nakamura, Tsutomu Yoshitake, Yoshimi Kubo
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Publication number: 20090035640Abstract: Pt-loaded carbon particles loaded with a catalyst (platinum: Pt) according to a suitable catalyst loading method, such as a colloid method, are subjected to an aldehyde treatment or an acid treatment, or the like, so that hydroxyl groups are introduced into surfaces of the Pt-loaded carbon particles. Then, (1,1-diphenyl-4-pentenyl) benzene containing a benzene group as a hydrophobic functional group is chemically bound to carbon particle sites into which the hydroxyl groups have been introduced, through radical polymerization. The (1,1-diphenyl-4-pentenyl) benzene has a high-volume molecular structure, and the benzene groups as the hydrophobic functional groups exist above surface regions of the Pt-loaded carbon particles on which the catalyst particles are not supported, so as to repel water from the Pt-loaded carbon particles.Type: ApplicationFiled: July 31, 2008Publication date: February 5, 2009Inventor: Takeshi Obata