Patents by Inventor Satoru Fujita

Satoru Fujita 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).

  • Publication number: 20150162850
    Abstract: In a power conversion device, a constant voltage can be supplied even when the voltage of an alternating current power supply fluctuates. A switching element Q1 and switching element Q2 are connected to a direct current power supply series circuit. A connection point of a direct current power supply and direct current power supply is a neutral point terminal, a connection point of the switching element Q1 and switching element Q2 is an output terminal, switch elements S1 and S2 are connected between the output terminal and neutral point terminal, switch elements S3 and S4 are connected between a terminal R of an alternating current power supply having a terminal S connected to the neutral point terminal, and the output terminal, and a first element and second element selected from among the switching elements Q1 and Q2 and switch elements S1 to S4 are turned on and off complementarily.
    Type: Application
    Filed: February 13, 2015
    Publication date: June 11, 2015
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Seitaro BANNO, Satoru FUJITA
  • Publication number: 20150124498
    Abstract: A power converter includes a first arm configured by connecting a diode to a switching element, a second arm configured by connecting a diode to another switching element, a third arm formed of a first bidirectional switch configured by connecting switch elements, and a fourth arm formed of a second bidirectional switch configured by connecting other switch elements. An inverter circuit is configured by connecting the first and second arms in series between terminals of a direct current power source circuit, by connecting the third arm between a terminal of an alternating current power source and an output terminal, and by connecting the fourth arm between the output terminal and another output terminal. The control mode of the inverter circuit is switched between control modes at a timing at which at least one common arm continues a conductible condition.
    Type: Application
    Filed: January 7, 2015
    Publication date: May 7, 2015
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Seitaro BANNO, Satoru FUJITA
  • Patent number: 8995152
    Abstract: An inverter circuit 40 with reduced loss in semiconductor elements when starting up, having switching elements Q1 and Q2 in series, and connected to both ends of a direct current power source circuit 30 having direct current power sources Psp and Psn in series, and including an alternating current output terminal U connected to a connection point of the switching elements, an alternating current output terminal V connected to a connection point of the direct current power sources, a bidirectional switch element S1, connected between the alternating current output terminal U and a terminal R of an alternating current power source 1, and a bidirectional switch element S2, connected between the alternating current output terminal U and a terminal S of the alternating current power source, causing the bidirectional switch elements to turn on and off when starting up.
    Type: Grant
    Filed: May 23, 2012
    Date of Patent: March 31, 2015
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Seitaro Banno, Satoru Fujita
  • Publication number: 20150042166
    Abstract: A power conversion device able to supply a constant load voltage even when the voltage of a 3-phase alternating current power supply fluctuates. A series circuit formed of switching element Q1 and switching element Q2 and a series circuit formed of switching element Q3 and switching element Q4 are connected to both ends of direct current power supply series circuit 3 formed of direct current power supply Psp and direct current power supply Psn, a bidirectional switch element S1 is connected between alternating current output terminals U and R, a bidirectional switch element S2 is connected between alternating current output terminal U and neutral terminal O, a bidirectional switch element S3 is connected between alternating current output terminal W and neutral terminal O, a bidirectional switch element S4 is connected between alternating current output terminal W and terminal T, and alternating current output terminals V and terminal S are connected.
    Type: Application
    Filed: September 5, 2014
    Publication date: February 12, 2015
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Satoru FUJITA, Ryuji YAMADA
  • Publication number: 20140368173
    Abstract: A power conversion apparatus includes first, second, third, and fourth switching elements. In a first period, the second and third switching elements are switched ON, and first and fourth switching elements are alternately switched ON/OFF. In a second period, the first and fourth switching elements are switched ON, and the second and third switching elements are alternately switched ON/OFF. In a third period, the first and second switching elements are switched ON, and the third and fourth switching elements are switched OFF. The power conversion apparatus provides a release path for inductive energy accumulated in a reactor.
    Type: Application
    Filed: September 2, 2014
    Publication date: December 18, 2014
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Seitaro BANNO, Satoru FUJITA
  • Publication number: 20140346884
    Abstract: A power converter that can supply constant voltage to a load even upon fluctuation of voltage of an AC power source includes an inverter circuit resulting from connecting switching elements in series, the inverter circuit being connected to both ends of a DC power source series circuit resulting from connecting in series two DC power sources; an AC output terminal that is connected to a connection point of the switching elements; another AC output terminal that is connected to a connection point of the DC power sources; and a bidirectional switch element including one end connected to the AC output terminal U and another end connected to a terminal of an AC power source.
    Type: Application
    Filed: August 7, 2014
    Publication date: November 27, 2014
    Inventors: Satoru FUJITA, Ryuji YAMADA
  • Publication number: 20140346877
    Abstract: A power converter can include an inverter including, connected in series, switching elements, the inverter circuit being connected to both ends of a DC power source series circuit resulting from connecting in series a DC power source and a DC power source. Also included can be an AC output terminal that is connected to a connection point of the switching element and the switching element, an AC output terminal that is connected to a connection point of the DC power source and the DC power source, a bidirectional switch element one end of which is connected to the AC output terminal and the other end of which is connected to a terminal of an AC power source and a bidirectional switch element one end of which is connected to the AC output terminal and the other end of which is connected to the AC power source.
    Type: Application
    Filed: August 7, 2014
    Publication date: November 27, 2014
    Inventors: Satoru FUJITA, Ryuji YAMADA
  • Publication number: 20140306659
    Abstract: An electric vehicle charging apparatus includes: a vehicle-side charging connector that is attachably and detachably connected to a charger-side connector provided in an outside vehicle charger; vehicle-side charging positive pole and negative pole lines that connect the vehicle-side charging connector and a power storage apparatus that is capable of being charged with the charger; a diode that is provided in the vehicle-side charging line, in which a forward direction is toward the power storage apparatus from the charger; and a resistor that is disposed in the vehicle to connect the vehicle-side charging positive pole line and the vehicle-side charging negative pole line between the diode and the vehicle-side charging connector.
    Type: Application
    Filed: December 6, 2012
    Publication date: October 16, 2014
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Masatoshi Nakajima, Satoru Fujita
  • Publication number: 20140242366
    Abstract: There is provided an organic polymer porous body having a first cyclic structure equipped with a 6-membered ring (A) or a 5-membered ring having three bonds; a second cyclic structure equipped with a 6-membered ring (B) having two or three bonds; and a carbon-carbon triple bond that links the first cyclic structure to the second cyclic structure. At least one of the first cyclic structure and the second cyclic structure contains at least one nitrogen atom.
    Type: Application
    Filed: February 19, 2014
    Publication date: August 28, 2014
    Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Hitoshi KUMAGAI, Satoru FUJITA, Satoru YAMAMOTO, Yoshiyuki SAKAMOTO, Takahiko ASAOKA
  • Publication number: 20140204642
    Abstract: An inverter circuit 40 with reduced loss in semiconductor elements when starting up, having switching elements Q1 and Q2 in series, and connected to both ends of a direct current power source circuit 30 having direct current power sources Psp and Psn in series, and including an alternating current output terminal U connected to a connection point of the switching elements, an alternating current output terminal V connected to a connection point of the direct current power sources, a bidirectional switch element S1, connected between the alternating current output terminal U and a terminal R of an alternating current power source 1, and a bidirectional switch element S2, connected between the alternating current output terminal U and a terminal S of the alternating current power source, causing the bidirectional switch elements to turn on and off when starting up.
    Type: Application
    Filed: May 23, 2012
    Publication date: July 24, 2014
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Seitaro Banno, Satoru Fujita
  • Publication number: 20130294124
    Abstract: Aspects of the invention include a step-up/step-down chopper unit, an inverter unit, a rectifier unit, first to third voltage detection means, and a drive control unit. Voltage regulation means of the drive control unit, in accordance with a detected voltage value detected by the voltage detection means, generates control signals for keeping the effective voltage value of a capacitor constant. In some aspects of the invention, the effective voltage value of the capacitor is controlled to be constant by the switching elements of the step-up/step-down chopper unit and inverter unit being driven by the control signals. The rectifier unit can suppress a surge voltage by causing energy stored in a inductor to be absorbed by storage elements when bidirectional switching elements are turned off.
    Type: Application
    Filed: July 11, 2013
    Publication date: November 7, 2013
    Inventor: Satoru FUJITA
  • Publication number: 20130206371
    Abstract: As a cooling structure, a cooling device has a configuration that comprises a mounting surface for a member to be cooled, a cooling fin provided on a rear surface side of the mounting surface, and a cooling passage for cooling the cooling fin with a liquid refrigerant, wherein the liquid refrigerant is caused to flow from a flow inlet to the cooling passage and is discharged from a discharge outlet. The cooling passage comprises a first surface provided with the cooling fin, a second surface opposing the first surface, and a wall portion provided between the first surface and the second surface and is configured into a channel longer than a channel connecting the flow inlet and the discharge outlet in a straight line. The wall portion has a first wall portion extending from the second surface to the first surface, and a second wall portion extending in parallel with the first wall portion from the first surface to a height exceeding a top portion of the first wall.
    Type: Application
    Filed: October 12, 2011
    Publication date: August 15, 2013
    Applicant: HONDA MOTOR CO., LTD.
    Inventor: Satoru Fujita
  • Publication number: 20130162101
    Abstract: A dielectric sintered body of the present invention contains Ba, Nb, and at least one of Zn and Co, as main components, and K and Ta as subcomponents. The ratio A of the peak intensity p2 of the (111) plane peak to the peak intensity p1 of the (310) plane peak in an X-ray diffraction measurement is 0.9 to 1.5. The half bandwidth C of the (111) plane peak ranges from 0.12 to 0.22°. The d-value D of the (111) plane peak ranges from 2.363 to 2.371. The dielectric sintered body has a Perovskite structure.
    Type: Application
    Filed: September 2, 2011
    Publication date: June 27, 2013
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Satoru Fujita, Yuki Kasuya
  • Patent number: 8467212
    Abstract: A high power factor rectifier circuit, provided with switching sections connected to an AC power supply for converting an AC voltage to a DC voltage, is formed with a bypass circuit provided. The bypass circuit, when the voltage of the AC power supply becomes higher than the voltage across a smoothing capacitor provided on the DC output side, makes a charge current flowing from the AC power supply to the capacitor bypass the switching section by making the switching section out of conduction. Thus, a rectifier circuit is provided which can be safely operated without causing any damage, or with minimized damage, even though an inrush current flows at turning-on the power or at recovery from a power interruption.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: June 18, 2013
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Kazuaki Mino, Satoru Fujita, Ryuji Yamada
  • Patent number: 8255970
    Abstract: A personal information generation apparatus 1 encapsulates personal information together with a transmission policy to generate a personal information capsule which is transmitted to personal information utilization apparatus 2. Personal information utilization apparatus 2 receives and holds the personal information capsule for utilization. In this event, personal information generation apparatus 1 transmits a transmission policy defined by the personal information producer. Personal information utilization apparatus 2 in turn transmits a reception policy defined by a personal information user. Then, personal information generation apparatus 1 and personal information utilization apparatus 2 determine a contractual coverage in regard to personal information to be distributed, and generate contract information. Eventually, the personal information is distributed from personal information generation apparatus 1 to personal information utilization apparatus 2 based on the generated contract information.
    Type: Grant
    Filed: June 12, 2006
    Date of Patent: August 28, 2012
    Assignee: NEC Corporation
    Inventors: Makoto Hatakeyama, Hidehito Gomi, Shigeru Hosono, Satoru Fujita
  • Patent number: 8245034
    Abstract: The present invention is intended to allow distribution of personal information to be managed on the basis of not only a personal information management policy defined by a personal information producer but also management policies of all apparatuses which handle personal information when the distribution of personal information is managed between apparatuses. In its configuration, personal information generation apparatus 1 encapsulates personal information together with a transmission policy to generate a personal information capsule which is transmitted to personal information utilization apparatus 2. Personal information utilization apparatus 2 receives and holds the personal information capsule for utilization. In this event, personal information generation apparatus 1 transmits a transmission policy defined by the personal information producer. Personal information utilization apparatus 2 in turn transmits a reception policy defined by a personal information user.
    Type: Grant
    Filed: December 28, 2009
    Date of Patent: August 14, 2012
    Assignee: NEC Corporation
    Inventors: Makoto Hatakeyama, Hidehito Gomi, Shigeru Hosono, Satoru Fujita
  • Publication number: 20110122667
    Abstract: A high power factor rectifier circuit, provided with switching sections connected to an AC power supply for converting an AC voltage to a DC voltage, is formed with a bypass circuit provided. The bypass circuit, when the voltage of the AC power supply becomes higher than the voltage across a smoothing capacitor provided on the DC output side, makes a charge current flowing from the AC power supply to the capacitor bypass the switching section by making the switching section out of conduction. Thus, a rectifier circuit is provided which can be safely operated without causing any damage, or with minimized damage, even though an inrush current flows at turning-on the power or at recovery from a power interruption.
    Type: Application
    Filed: November 22, 2010
    Publication date: May 26, 2011
    Applicant: FUJI ELECTRIC HOLDINGS CO., LTD.
    Inventors: Kazuaki MINO, Satoru FUJITA, Ryuji YAMADA
  • Publication number: 20100100732
    Abstract: The present invention is intended to allow distribution of personal information to be managed on the basis of not only a personal information management policy defined by a personal information producer but also management policies of all apparatuses which handle personal information when the distribution of personal information is managed between apparatuses. In its configuration, personal information generation apparatus 1 encapsulates personal information together with a transmission policy to generate a personal information capsule which is transmitted to personal information utilization apparatus 2. Personal information utilization apparatus 2 receives and holds the personal information capsule for utilization. In this event, personal information generation apparatus 1 transmits a transmission policy defined by the personal information producer. Personal information utilization apparatus 2 in turn transmits a reception policy defined by a personal information user.
    Type: Application
    Filed: December 28, 2009
    Publication date: April 22, 2010
    Applicant: NEC CORPORATION
    Inventors: Makoto HATAKEYAMA, Hidehito GOMI, Shigeru HOSONO, Satoru FUJITA
  • Patent number: 7516396
    Abstract: A system, a method, and a program for structured document derivation for generating derived structured documents of different representations having the same contents, facilitating the test for a structured document processor, and avoiding the vulnerability of the structured document processing. A monitor monitors a call from a structured document processing generator to a structured document processor to have a test structured document. A structured document derivation system generates derived structured documents of the test structured document. The derived structured documents are sent to a testing device for testing the structured document processor. A test analyzer determines whether or not each derivative pattern can be accepted. When the processing of a structured document is requested, the test analyzer analyzes the document. When the structured document matches an unacceptable pattern, the document is replaced with an acceptable one.
    Type: Grant
    Filed: March 28, 2005
    Date of Patent: April 7, 2009
    Assignee: NEC Corporation
    Inventor: Satoru Fujita
  • Patent number: 7514384
    Abstract: The present invention relates to an active oxygen developing substance composed of an aluminosilicate obtained by heating hydrogarnet as a precursor substance at 700° C. or higher; an aluminosilicate catalyst supporting cobalt oxide, produced by supporting cobalt oxide on the surface of the aluminosilicate; a method for manufacturing these; and applications of these as oxidation catalysts, solid electrolytes, oxygen occlusion carriers, and so forth.
    Type: Grant
    Filed: August 20, 2003
    Date of Patent: April 7, 2009
    Assignee: National Institute of Advanced Industrial Science and Technology
    Inventors: Kenzi Suzuki, Satoru Fujita