Patents by Inventor Yuji Kudoh
Yuji Kudoh 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).
-
Patent number: 11736104Abstract: A switch system includes a bidirectional switch, a first gate driver circuit, a second gate driver circuit, a control unit, a first decision unit, and a second decision unit. The bidirectional switch includes a first source, a second source, a first gate, and a second gate. The first decision unit determines, based on a voltage at the first gate and a first threshold voltage, a state of the first gate in a first period in which a signal to turn OFF the first gate is output from the control unit to the first gate driver circuit. The second decision unit determines, based on a voltage at the second gate and a second threshold voltage, a state of the second gate in a second period in which a signal to turn OFF the second gate is output from the control unit to the second gate driver circuit.Type: GrantFiled: October 23, 2020Date of Patent: August 22, 2023Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Yusuke Kinoshita, Hidetoshi Ishida, Hiroyuki Handa, Yuji Kudoh, Satoshi Nakazawa
-
Publication number: 20220337239Abstract: A switch system includes a bidirectional switch, a first gate driver circuit, a second gate driver circuit, a control unit, a first decision unit, and a second decision unit. The bidirectional switch includes a first source, a second source, a first gate, and a second gate. The first decision unit determines, based on a voltage at the first gate and a first threshold voltage, a state of the first gate in a first period in which a signal to turn OFF the first gate is output from the control unit to the first gate driver circuit. The second decision unit determines, based on a voltage at the second gate and a second threshold voltage, a state of the second gate in a second period in which a signal to turn OFF the second gate is output from the control unit to the second gate driver circuit.Type: ApplicationFiled: October 23, 2020Publication date: October 20, 2022Inventors: Yusuke KINOSHITA, Hidetoshi ISHIDA, Hiroyuki HANDA, Yuji KUDOH, Satoshi NAKAZAWA
-
Patent number: 11239760Abstract: A power conversion system converts an input alternating-current voltage having a first frequency into an output alternating-current voltage having a second frequency lower than the first frequency. The power conversion system includes a voltage converter, a PDM controller, and a feedback controller. The voltage converter converts the input alternating-current voltage into the output alternating-current voltage in accordance with control signals and outputs the output alternating-current voltage to a load. The PDM controller performs pulse density modulation of an output voltage command value of the output alternating-current voltage to generate the control signals and outputs the control signals to the voltage converter. The feedback controller generates the output voltage command value based on an output current value of the voltage converter and a state of the load and outputs the output voltage command value to the PDM controller.Type: GrantFiled: March 25, 2019Date of Patent: February 1, 2022Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventor: Yuji Kudoh
-
Publication number: 20210013811Abstract: A power conversion system converts an input alternating-current voltage having a first frequency into an output alternating-current voltage having a second frequency lower than the first frequency. The power conversion system includes a voltage converter, a PDM controller, and a feedback controller. The voltage converter converts the input alternating-current voltage into the output alternating-current voltage in accordance with control signals and outputs the output alternating-current voltage to a load. The PDM controller performs pulse density modulation of an output voltage command value of the output alternating-current voltage to generate the control signals and outputs the control signals to the voltage converter. The feedback controller generates the output voltage command value based on an output current value of the voltage converter and a state of the load and outputs the output voltage command value to the PDM controller.Type: ApplicationFiled: March 25, 2019Publication date: January 14, 2021Inventor: Yuji KUDOH
-
Patent number: 9543849Abstract: A power conversion method including: receiving, by a pair of input terminals, an input voltage in which is a single-phase AC voltage; designating a first target voltage ref1, a second target voltage ref2, and a third target voltage ref3 respectively representing consecutive target values of first-phase, second-phase, and third-phase output voltages forming a three-phase AC voltage; and cyclically connecting and disconnecting (i) the input terminals and first output terminals at a duty cycle corresponding to |ref1/in| when an instantaneous value of |in| is greater than an instantaneous value of |ref1|, (ii) the input terminals and second output terminals at a duty cycle corresponding to |ref2/in| when the instantaneous value of |in| is greater than an instantaneous value of |ref2|, and (iii) the input terminals and third output terminals at a duty cycle corresponding to |ref3/in| when the instantaneous value of |in| is greater than an instantaneous value of |ref3|.Type: GrantFiled: March 28, 2014Date of Patent: January 10, 2017Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Kenji Mizutani, Yuji Kudoh, Nobuyuki Otsuka
-
Patent number: 9531317Abstract: An efficient and reliable power conversion method for converting an input voltage which is a single-phase AC voltage into output voltages forming a two-phase AC voltage includes: receiving an input voltage; designating, as a first target voltage representing consecutive target values of a first-phase output voltage and a second target voltage representing consecutive target values of a second-phase output voltage, AC voltages forming a two-phase AC voltage and having (i) an amplitude 1/?2 times smaller than an amplitude of the input voltage, and (ii) phase differences of +45 degrees and ?45 degrees relative to the input voltage; and designating a frequency other than a frequency twice a frequency of the input voltage, as a frequency of the first target voltage and the second target voltage.Type: GrantFiled: January 10, 2014Date of Patent: December 27, 2016Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Yuji Kudoh, Kenji Mizutani, Nobuyuki Otsuka
-
Publication number: 20160065083Abstract: A power conversion method including: receiving, by a pair of input terminals, an input voltage in which is a single-phase AC voltage; designating a first target voltage ref1, a second target voltage ref2, and a third target voltage ref3 respectively representing consecutive target values of first-phase, second-phase, and third-phase output voltages forming a three-phase AC voltage; and cyclically connecting and disconnecting (i) the input terminals and first output terminals at a duty cycle corresponding to |ref1/in| when an instantaneous value of |in| is greater than an instantaneous value of |ref1|, (ii) the input terminals and second output terminals at a duty cycle corresponding to |ref2/in| when the instantaneous value of |in| is greater than an instantaneous value of |ref2|, and (iii) the input terminals and third output terminals at a duty cycle corresponding to |ref3/in| when the instantaneous value of |in| is greater than an instantaneous value of |ref3|.Type: ApplicationFiled: March 28, 2014Publication date: March 3, 2016Inventors: Kenji MIZUTANI, Yuji KUDOH, Nobuyuki OTSUKA
-
Publication number: 20150333689Abstract: An efficient and reliable power conversion method for converting an input voltage which is a single-phase AC voltage into output voltages forming a two-phase AC voltage includes: receiving an input voltage; designating, as a first target voltage representing consecutive target values of a first-phase output voltage and a second target voltage representing consecutive target values of a second-phase output voltage, AC voltages forming a two-phase AC voltage and having (i) an amplitude 1/?2 times smaller than an amplitude of the input voltage, and (ii) phase differences of +45 degrees and ?45 degrees relative to the input voltage; and designating a frequency other than a frequency twice a frequency of the input voltage, as a frequency of the first target voltage and the second target voltage.Type: ApplicationFiled: January 10, 2014Publication date: November 19, 2015Inventors: Yuji KUDOH, Kenji MIZUTANI, Nobuyuki OTSUKA
-
Patent number: 8941350Abstract: A power conversion method including: receiving an input voltage which is a single-phase AC voltage; designating a first target voltage and a second target voltage respectively representing consecutive target values of a first-phase output voltage and a second-phase output voltage which form a two-phase AC voltage; cyclically connecting and disconnecting a pair of input terminals and a pair of first output terminals at a duty cycle corresponding to a ratio |ref1/in| during a time period in which an instantaneous absolute value of the input voltage is greater than an instantaneous absolute value of the first target voltage; and cyclically connecting and disconnecting the pair of the input terminals and a pair of second output terminals at a duty cycle corresponding to a ratio |ref2/in| during time periods in which the instantaneous absolute value of the input voltage is greater than an instantaneous absolute value of the second target voltage.Type: GrantFiled: July 29, 2013Date of Patent: January 27, 2015Assignee: Panasonic CorporationInventors: Nobuyuki Otsuka, Yuji Kudoh, Toshimitsu Morizane
-
Publication number: 20130307463Abstract: A power conversion method including: receiving an input voltage which is a single-phase AC voltage; designating a first target voltage and a second target voltage respectively representing consecutive target values of a first-phase output voltage and a second-phase output voltage which form a two-phase AC voltage; cyclically connecting and disconnecting a pair of input terminals and a pair of first output terminals at a duty cycle corresponding to a ratio |ref1/in| during a time period in which an instantaneous absolute value of the input voltage is greater than an instantaneous absolute value of the first target voltage; and cyclically connecting and disconnecting the pair of the input terminals and a pair of second output terminals at a duty cycle corresponding to a ratio |ref2/in| during time periods in which the instantaneous absolute value of the input voltage is greater than an instantaneous absolute value of the second target voltage.Type: ApplicationFiled: July 29, 2013Publication date: November 21, 2013Applicant: Panasonic CorporationInventors: Nobuyuki OTSUKA, Yuji KUDOH, Toshimitsu MORIZANE
-
Patent number: 8427090Abstract: To develop a motor which can directly drive a brushless motor using a conventional circuit for an inverter without smoothing circuit and a circuit for a matrix converter that are for a brushed motor that operates on single-phase 100 V. Magnetic cores are attached to a motor shaft to increase inertial force. A magnetic-drive-pulsation motor which modulates torque is realized using force of attraction and repulsion generated by outer magnets and magnetic cores. The magnetic-drive-pulsation motor can be driven using the inverter and the matrix converter on single-phase 100 V power supply.Type: GrantFiled: September 28, 2011Date of Patent: April 23, 2013Assignee: Panasonic CorporationInventors: Nobuyuki Otsuka, Yuji Kudoh, Daisuke Ueda, Hitoshi Taya
-
Publication number: 20120019182Abstract: To develop a motor which can directly drive a brushless motor using a conventional circuit for an inverter without smoothing circuit and a circuit for a matrix converter that are for a brushed motor that operates on single-phase 100 V. Magnetic cores are attached to a motor shaft to increase inertial force. A magnetic-drive-pulsation motor which modulates torque is realized using force of attraction and repulsion generated by outer magnets and magnetic cores. The magnetic-drive-pulsation motor can be driven using the inverter and the matrix converter on single-phase 100 V power supply.Type: ApplicationFiled: September 28, 2011Publication date: January 26, 2012Inventors: Nobuyuki OTSUKA, Yuji Kudoh, Daisuke Ueda, Hitoshi Taya
-
Patent number: 7733000Abstract: To improve adhesive properties between an electrically conductive polymer membrane and a solid electrolyte membrane to each other, and thus to ensure the operation of an electrically conductive polymer actuator which effects a bending motion is aimed.Type: GrantFiled: May 1, 2009Date of Patent: June 8, 2010Assignee: Panasonic CorporationInventor: Yuji Kudoh
-
Patent number: 7696669Abstract: An electrically conductive polymer actuator having a laminated structure including: a solid electrolyte membrane constituted with a mixture of an ionic liquid, and an organic polymer that contains at least one or more of a vinylidene fluoride/hexafluoropropylene copolymer [P(VDF/HFP)], polyvinylidene fluoride (PVDF), a perfluorosulfonic acid/PTFE copolymer, polymethyl methacrylate (PMMA), polyethylene oxide (PEO) and polyacrylonitrile (PAN); and an electrically conductive polymer membrane constituted with a mixture of polystyrene sulfonic acid (PSS) and polyethylenedioxythiophene (PEDOT) on at least one face of the solid electrolyte membrane, characterized in that polyethylene glycol is included in the electrically conductive polymer membrane.Type: GrantFiled: January 30, 2009Date of Patent: April 13, 2010Assignee: Panasonic CorporationInventor: Yuji Kudoh
-
Patent number: 7679268Abstract: A plane thin-type polymer actuator is provided with a conductive active member serving as a first electrode layer, and a second electrode layer, with at least a first electrolytic layer made in contact with the active member layer. The first electrolytic layer being sealed between the two electrode layers so that, by applying an electric field between the two electrode layers, the active member layer is expanded and contracted. In this structure, the first electrolytic layer is a solid-state electrolyte having a specific elastic modulus, or a liquid-state electrolyte. A holding member is provided to maintain the thickness between the active member layer and the second electrode layer.Type: GrantFiled: May 29, 2007Date of Patent: March 16, 2010Assignee: Panasonic CorporationInventors: Kazuo Yokoyama, Katsuhiko Asai, Yuji Kudoh, Masaki Yamamoto
-
Publication number: 20100039001Abstract: To improve adhesive properties between an electrically conductive polymer membrane and a solid electrolyte membrane to each other, and thus to ensure the operation of an electrically conductive polymer actuator which effects a bending motion is aimed.Type: ApplicationFiled: May 1, 2009Publication date: February 18, 2010Applicant: PANASONIC CORPORATIONInventor: Yuji KUDOH
-
Patent number: 7638930Abstract: To improve adhesive properties between an electrically conductive polymer membrane and a solid electrolyte membrane to each other, and thus to ensure the operation of an electrically conductive polymer actuator which effects a bending motion is aimed.Type: GrantFiled: January 30, 2009Date of Patent: December 29, 2009Assignee: Panasonic CorporationInventor: Yuji Kudoh
-
Publication number: 20090308737Abstract: To improve adhesive properties between an electrically conductive polymer membrane and a solid electrolyte membrane to each other, and thus to ensure the operation of an electrically conductive polymer actuator which effects a bending motion is aimed.Type: ApplicationFiled: January 30, 2009Publication date: December 17, 2009Applicant: PANASONIC CORPORATIONInventor: Yuji KUDOH
-
Publication number: 20090251027Abstract: Adhesive properties between an electrically conductive polymer membrane and a solid electrolyte membrane to each other are improved, and thus the operation of an electrically conductive polymer actuator which effects a bending motion is ensured. An electrically conductive polymer actuator having a laminated structure including: a solid electrolyte membrane constituted with a mixture of an ionic liquid, and an organic polymer that contains at least one or more of a vinylidene fluoride/hexafluoropropylene copolymer [P(VDF/HFP)], polyvinylidene fluoride (PVDF), a perfluorosulfonic acid/PTFE copolymer, polymethyl methacrylate (PMMA), polyethylene oxide (PEO) and polyacrylonitrile (PAN); and an electrically conductive polymer membrane constituted with a mixture of polystyrene sulfonic acid (PSS) and polyethylenedioxythiophene (PEDOT) on at least one face of the solid electrolyte membrane, characterized in that polyethylene glycol is included in the electrically conductive polymer membrane.Type: ApplicationFiled: January 30, 2009Publication date: October 8, 2009Applicant: PANASONIC CORPORATIONInventor: Yuji KUDOH
-
Patent number: 7297296Abstract: It is a principal object of the present invention to provide a dielectric having a high relative dielectric constant and dielectric loss minimized in high frequency bands. That is, the present invention relates to a composite dielectric comprising conductive particles dispersed in a porous body of inorganic oxide, wherein 1) the relative dielectric constant ¥r of the dielectric in high frequency bands of 1 GHz or more is 4 or more, and 2) the dielectric loss tan? of the dielectric in high frequency bands of 1 GHz or more is 2×10?4 or less, and to a manufacturing method therefor.Type: GrantFiled: April 7, 2005Date of Patent: November 20, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yuji Kudoh, Takashi Hashida, Masa-aki Suzuki