Patents by Inventor Yuji Shirakata
Yuji Shirakata 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: 20140024010Abstract: Provided is a novel method capable of producing an artificial skin model. A method for producing an artificial skin model includes: providing coated cells (1), each of which is obtained by covering the surface of a cell (3) with a coating film (2) containing an extracellular matrix component; forming a dermis tissue layer (7), in which the coated cells (1) are laminated, by culturing the coated cells (1); and forming an epidermis layer (12) by arranging epidermis cells (8) on the dermis tissue layer (7).Type: ApplicationFiled: March 29, 2012Publication date: January 23, 2014Applicant: OSAKA UNIVERSITYInventors: Mitsuru Akashi, Michiya Matsusaki, Takeshi Sakura, Koji Hashimoto, Yuji Shirakata, Satoshi Hirakawa
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Publication number: 20130221890Abstract: Provided is a rotating electrical machine capable of downsizing. The rotating electrical machine includes: a stator (2) including an armature winding (9); a rotor (3) provided inside the stator (2) in a rotatable manner; a power circuit unit (18) including a power circuit semiconductor switching element, for supplying a current to the armature winding (9); and a control board (6) in which an energization-allowed time corresponding to revolution speed of the rotor (3) is set, for controlling supply of the current by the power circuit unit (18), in which the control board (6) stops the supply of the current by the power circuit unit (18) when an integrated time of energization times to the armature winding (9) is longer than the energization-allowed time.Type: ApplicationFiled: December 10, 2010Publication date: August 29, 2013Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Yuji Shirakata, Dai Nakajima, Masahiko Fujita
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Patent number: 8299666Abstract: A dynamoelectric machine main body, power circuit modules and a field circuit module, and a control apparatus that has a heatsink that is prepared by die casting, and that is mounted integrally onto the dynamoelectric machine main body are included, the heatsink including a plurality of convex heat receiving portions that are disposed so as to project from a front surface of a base plate, and that have heat receiving surfaces, the power circuit modules and the field circuit module including seal main body portions that are constituted by an electrically insulating resin that seal switching elements so as to expose bottom surfaces of element heat radiating portions on reference surfaces that have a surface shape that corresponds to a shape of the heat receiving surfaces, and electrical insulation supporting layers being interposed between the bottom surfaces of the heat receiving surfaces and the element heat radiating portions.Type: GrantFiled: June 21, 2010Date of Patent: October 30, 2012Assignee: Mitsubishi Electric CorporationInventors: Yuji Shirakata, Dai Nakajima, Masahiko Fujita, Masaki Kato, Kazuyasu Sakamoto, Takuya Oga
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Patent number: 8004130Abstract: There is provided a rotating electric machine including a rotation sensor unit capable of demonstrating a shielding effect over a wide frequency bandwidth and a manufacturing method therefor. In the rotating electric machine, a power unit provided with a switching element that controls an electric current that flows in a stator winding and a magnetic-field current control circuit unit provided with a switching element that controls an electric current that flows in a rotor winding are arranged on a predetermined surface of one of a pair of brackets that pivotably support a rotor shaft, and the rotation sensor unit is disposed in the vicinity of the predetermined surface of the one bracket; The rotating electric machine is characterized in such a way that there is provided a ring-shaped member that is fixed on the outer surface of the rotation sensor unit, and the ring-shaped member is configured with a non-magnetic unit having an electric conductivity and a magnetic unit.Type: GrantFiled: January 21, 2009Date of Patent: August 23, 2011Assignee: Mitsubishi Electric CorporationInventors: Masao Kikuchi, Yoshinobu Utsumi, Hitoshi Isoda, Yuji Shirakata, Masahiko Fujita
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Publication number: 20110175496Abstract: A dynamoelectric machine main body, power circuit modules and a field circuit module, and a control apparatus that has a heatsink that is prepared by die casting, and that is mounted integrally onto the dynamoelectric machine main body are included, the heatsink including a plurality of convex heat receiving portions that are disposed so as to project from a front surface of a base plate, and that have heat receiving surfaces, the power circuit modules and the field circuit module including seal main body portions that are constituted by an electrically insulating resin that seal switching elements so as to expose bottom surfaces of element heat radiating portions on reference surfaces that have a surface shape that corresponds to a shape of the heat receiving surfaces, and electrical insulation supporting layers being interposed between the bottom surfaces of the heat receiving surfaces and the element heat radiating portions.Type: ApplicationFiled: June 21, 2010Publication date: July 21, 2011Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Yuji SHIRAKATA, Dai Nakajima, Masahiko Fujita, Masaki Kato, Kazuyasu Sakamoto, Takuya Oga
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Patent number: 7880299Abstract: The present invention is intended to obtain a semiconductor device that is reduced in size, weight, and cost and improved in performance stability and productivity. The semiconductor device includes a semiconductor module in which a semiconductor element is sealed with a resin, a reinforcing beam fixed to an upper surface of the semiconductor module via a plate-like spring, and a frame part to which both ends of the reinforcing beam are fixed, the frame part being disposed in such a fashion as to enclose from four directions an outer periphery of the semiconductor module, plate-like spring, and the reinforcing beam.Type: GrantFiled: July 15, 2008Date of Patent: February 1, 2011Assignee: Mitsubishi Electric CorporationInventors: Toru Kimura, Yuji Shirakata
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Publication number: 20100301692Abstract: An object of the present invention is to provide an electrical rotating machine capable of securing safety against collision. Included are a rotor having a field winding and cooling fans, and a stator having a stator winding, arranged so as to surround the rotor. A bracket 1 is fixed to a load side end of the stator, and a heat sink is disposed inside the bracket. On the anti-load side of the heat sink, a field circuit unit and power circuit units for controlling the field winding and the stator winding, respectively, are mounted, whereas on the load side thereof, cooling fins are disposed. The anti-load side and lateral side of the field circuit unit and the power circuit units are surrounded by the bracket. Accordingly, a whole of the field circuit unit and the power circuit units is surrounded by the bracket and the heat sink.Type: ApplicationFiled: November 2, 2009Publication date: December 2, 2010Applicant: Mitsubishi Electric CorporationInventors: Yuji SHIRAKATA, Masao Kikuchi, Masahiko Fujita, Hitoshi Isoda
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Publication number: 20100133961Abstract: A controller-integrated rotating electrical machine includes a rotating electrical machine main body having a stator winding and a field winding and provided with a rotation detector that detects a rotation angle of a rotation shaft, a power circuit that controls a current flowing into the stator winding according to a detection output of the rotation detection portion, a field switching circuit that controls a current to flow into the field winding, and a capacitor connected in parallel with the power circuit and the field switching circuit. Both ends of the capacitor portion are connected to an external battery. The capacitor is disposed in closer proximity to the field switching circuit than the rotation detector, and connected to the field switching circuit via a common connection terminal. Noises superimposed on the rotation detection portion are thus reduced.Type: ApplicationFiled: April 27, 2009Publication date: June 3, 2010Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Yuji SHIRAKATA, Masao KIKUCHI, Hitoshi ISODA, Takamasa ASAI, Katsuya TSUJIMOTO
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Publication number: 20100097053Abstract: There is provided a rotating electric machine including a rotation sensor unit capable of demonstrating a shielding effect over a wide frequency bandwidth and a manufacturing method therefor. In the rotating electric machine, a power unit provided with a switching element that controls an electric current that flows in a stator winding and a magnetic-field current control circuit unit provided with a switching element that controls an electric current that flows in a rotor winding are arranged on a predetermined surface of one of a pair of brackets that pivotably support a rotor shaft, and the rotation sensor unit is disposed in the vicinity of the predetermined surface of the one bracket; The rotating electric machine is characterized in such a way that there is provided a ring-shaped member that is fixed on the outer surface of the rotation sensor unit, and the ring-shaped member is configured with a non-magnetic unit having an electric conductivity and a magnetic unit.Type: ApplicationFiled: January 21, 2009Publication date: April 22, 2010Applicant: Mitsubishi Electric CorporationInventors: Masao KIKUCHI, Yoshinobu UTSUMI, Hitoshi ISODA, Yuji SHIRAKATA, Masahiko FUJITA
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Patent number: 7635938Abstract: A vehicular rotary electric machine has a stator and a rotor supported by a bracket; a field winding which is provided on the rotor and is for generating a magnetomotive force; a field circuit section which is for supplying a current to the field winding; and a brush holder having a brush, the field circuit section and the brush holder being separately mounted to the bracket. In the vehicular rotary electric machine, connecting means between the field circuit section and the brush holder is configured by an intermediate wiring member having a stress buffering mechanism.Type: GrantFiled: October 22, 2008Date of Patent: December 22, 2009Assignee: Mitsubishi Electric CorporationInventors: Yuji Shirakata, Masao Kikuchi, Naohide Maeda
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Publication number: 20090302706Abstract: A vehicular rotary electric machine has a stator and a rotor supported by a bracket; a field winding which is provided on the rotor and is for generating a magnetomotive force; a field circuit section which is for supplying a current to the field winding; and a brush holder having a brush, the field circuit section and the brush holder being separately mounted to the bracket. In the vehicular rotary electric machine, connecting means between the field circuit section and the brush holder is configured by an intermediate wiring member having a stress buffering mechanism.Type: ApplicationFiled: October 22, 2008Publication date: December 10, 2009Applicant: Mitsubishi Electric CorporationInventors: Yuji SHIRAKATA, Masao Kikuchi, Naohide Maeda
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Publication number: 20090039504Abstract: The present invention is intended to obtain a semiconductor device that is reduced in size, weight, and cost and improved in performance stability and productivity. The semiconductor device includes a semiconductor module in which a semiconductor element is sealed with a resin, a reinforcing beam fixed to an upper surface of the semiconductor module via a plate-like spring, and a frame part to which both ends of the reinforcing beam are fixed, the frame part being disposed in such a fashion as to enclose from four directions an outer periphery of the semiconductor module, plate-like spring, and the reinforcing beam.Type: ApplicationFiled: July 15, 2008Publication date: February 12, 2009Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Toru Kimura, Yuji Shirakata