Patents by Inventor Yuuya Tanaka
Yuuya Tanaka 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: 10404170Abstract: A power supply unit includes: a first rectifying device connected to the direct current power source, a second rectifying device having an anode connected to the first rectifying device, a first condenser having one end connected to the second rectifying device, a second condenser connected to the second rectifying device, a third rectifying device having an anode connected to the second rectifying device, a resonance reactor connected to the third rectifying device and connected to the first condenser, s switching device connected to the direct current power source and connected the third rectifying device, an output reactor connected to the third rectifying device, an output condenser connected to the direct current power source and connected to the output reactor, an output rectifying device connected to the first condenser and connected to the direct current power source, a control circuit sending a gate signal to the switching device.Type: GrantFiled: April 2, 2015Date of Patent: September 3, 2019Assignee: Mitsubishi Electric CorporationInventors: Mai Uenaka, Yuuya Tanaka, Masaki Yamada, Yoshihiro Takeshima
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Patent number: 10343533Abstract: A first DC/DC converter is of a constant voltage control type and is controlled so as to keep the voltage of an electric generation bus at a predetermined target value. A second DC/DC converter is of a constant current control type and is controlled so as to keep input current or output current at predetermined target current. A control circuit determines an optimum target value of electric generation bus voltage, based on different algorithms, in accordance with all or some of modes A to C which are classified by the charging/discharging condition of a second electric storage device, and controls the first DC/DC converter so that the electric generation bus voltage becomes the determined target value.Type: GrantFiled: April 8, 2011Date of Patent: July 9, 2019Assignee: Mitsubishi Electric CorporationInventors: Shigeki Harada, Yusuke Higaki, Yuuya Tanaka, Yasuyoshi Hori, Masaki Yamada, Toshiyuki Yoshizawa
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Patent number: 10164546Abstract: An electric power conversion device which performs conversion to desired voltage using charge and discharge of a DC capacitor includes: a reactor connected to a rectification circuit; a leg part in which diodes and first and second switching elements are connected in series between positive and negative terminals of a smoothing capacitor, and to which the reactor is connected; and the DC capacitor. A control circuit performs high-frequency PWM control for the first and second switching elements using the same drive cycle, with their reference phases shifted from each other by a half cycle, and controls a sum and a ratio of ON periods of the first and second switching elements in one cycle, thereby allowing both high-power-factor control for input AC current and voltage control for the DC capacitor.Type: GrantFiled: June 3, 2014Date of Patent: December 25, 2018Assignee: Mitsubishi Electric CorporationInventors: Ryota Kondo, Takaaki Takahara, Satoshi Murakami, Masaki Yamada, Naohisa Uehara, Yuuya Tanaka, Hidehiko Kinoshita
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Publication number: 20180183318Abstract: A power supply unit includes: a first rectifying device connected to the direct current power source, a second rectifying device having an anode connected to the first rectifying device, a first condenser having one end connected to the second rectifying device, a second condenser connected to the second rectifying device, a third rectifying device having an anode connected to the second rectifying device, a resonance reactor connected to the third rectifying device and connected to the first condenser, s switching device connected to the direct current power source and connected the third rectifying device, an output reactor connected to the third rectifying device, an output condenser connected to the direct current power source and connected to the output reactor, an output rectifying device connected to the first condenser and connected to the direct current power source, a control circuit sending a gate signal to the switching device.Type: ApplicationFiled: April 2, 2015Publication date: June 28, 2018Applicant: Mitsubishi Electric CorporationInventors: Mai UENAKA, Yuuya TANAKA, Masaki YAMADA, Yoshihiro TAKESHIMA
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Publication number: 20160197562Abstract: An electric power conversion device which performs conversion to desired voltage using charge and discharge of a DC capacitor includes: a reactor connected to a rectification circuit; a leg part in which diodes and first and second switching elements are connected in series between positive and negative terminals of a smoothing capacitor, and to which the reactor is connected; and the DC capacitor. A control circuit performs high-frequency PWM control for the first and second switching elements using the same drive cycle, with their reference phases shifted from each other by a half cycle, and controls a sum and a ratio of ON periods of the first and second switching elements in one cycle, thereby allowing both high-power-factor control for input AC current and voltage control for the DC capacitor.Type: ApplicationFiled: June 3, 2014Publication date: July 7, 2016Applicant: Mitsubishi Electric CorporationInventors: Ryota KONDO, Takaaki TAKAHARA, Satoshi MURAKAMI, Masaki YAMADA, Naohisa UEHARA, Yuuya TANAKA, Hidehiko KINOSHITA
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Patent number: 9365175Abstract: A first DC/DC converter is provided between a rectifier for rectifying output of an electric generator driven by an engine, and a battery for supplying power to an in-vehicle load. An electric double layer capacitor and a second DC/DC converter for charge/discharge current control for the capacitor are provided between the rectifier and the first DC/DC converter. A control circuit sets a current target value which is a control target value for the second DC/DC converter, based on the voltage value of a battery bus, and when charging of the electric double layer capacitor is to be stopped based on a charge/discharge instruction signal, performs, before the charging is stopped, control of gradually attenuating the current target value for the second DC/DC converter, based on a voltage value VEDLC of the electric double layer capacitor.Type: GrantFiled: June 29, 2011Date of Patent: June 14, 2016Assignee: Mitsubishi Electric CorporationInventors: Yusuke Higaki, Yuuya Tanaka, Masaki Yamada, Toshiyuki Yoshizawa, Shigeki Harada
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Patent number: 9369074Abstract: An electric power supply system includes: an AC generator having a drooping characteristic; a rectification section for converting AC output of the AC generator to DC; a load having an electric storage device supplied with power from the AC generator; and a control section provided between the rectification section and the load. The control section controls the AC generator so that the AC generator operates at predetermined voltage lower than output voltage corresponding to the maximum power operation point of the AC generator.Type: GrantFiled: February 15, 2012Date of Patent: June 14, 2016Assignee: Mitsubishi Electric CorporationInventors: Yuuya Tanaka, Masaki Yamada, Shigeki Harada, Hiroshi Okuda, Nobuhiro Kihara
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Patent number: 8864238Abstract: Provided is a seat pad 1 having a fastener member 4 on a front surface side of a pad body 2 made of a foaming resin, which includes: a ventilation member 5, one end portion of the ventilation member being located in the vicinity of the fastener member 4, and the other end portion of the ventilation member extending on a rear surface side of the pad body 2.Type: GrantFiled: March 1, 2010Date of Patent: October 21, 2014Assignee: Bridgestone CorporationInventors: Masato Oota, Yuuya Tanaka, Toshio Suzuki
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Patent number: 8773082Abstract: An object of the present invention is to provide a DC/DC power conversion apparatus that can reduce the average power consumption over a wide range of DC voltage ratios. A control circuit (120) changes a switching frequency f at which IGBTs S1 to S4 perform ON/OFF operation, in accordance with a voltage ratio k (k=V2/V1) for DC voltage conversion, based on the following expressions, such that a magnitude ?I of a current ripple flowing in a reactor Lc is a predetermined constant value irrespective of the voltage ratio k.Type: GrantFiled: July 26, 2010Date of Patent: July 8, 2014Assignee: Mitsubishi Electric CorporationInventors: Takahiro Urakabe, Tatsuya Okuda, Yuuya Tanaka, Masaru Kobayashi, Matahiko Ikeda, Hirotoshi Maekawa
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Publication number: 20140097805Abstract: An electric power supply system includes: an AC generator having a drooping characteristic; a rectification section for converting AC output of the AC generator to DC; a load having an electric storage device supplied with power from the AC generator; and a control section provided between the rectification section and the load. The control section controls the AC generator so that the AC generator operates at predetermined voltage lower than output voltage corresponding to the maximum power operation point of the AC generator.Type: ApplicationFiled: February 15, 2012Publication date: April 10, 2014Applicant: Mitsubishi Electric CorporationInventors: Yuuya Tanaka, Masaki Yamada, Shigeki Harada, Hiroshi Okuda, Nobuhiro Kihara
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Publication number: 20140021920Abstract: A first DC/DC converter (5) is of a constant voltage control type and is controlled so as to keep the voltage of an electric generation bus (A) at a predetermined target value. A second DC/DC converter (7) is of a constant current control type and is controlled so as to keep input current or output current at predetermined target current. A control circuit (8) determines an optimum target value Va* of electric generation bus voltage, based on different algorithms, in accordance with all or some of modes A to C which are classified by the charging/discharging condition of a second electric storage device (6), and controls the first DC/DC converter (5) so that the electric generation bus voltage Va becomes the determined target value Va*.Type: ApplicationFiled: April 8, 2011Publication date: January 23, 2014Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Shigeki Harada, Yusuke Higaki, Yuuya Tanaka, Yasuyoshi Hori, Masaki Yamada, Toshiyuki Yoshizawa
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Publication number: 20130264868Abstract: A first DC/DC converter is provided between a rectifier for rectifying output of an electric generator driven by an engine, and a battery for supplying power to an in-vehicle load. An electric double layer capacitor and a second DC/DC converter for charge/discharge current control for the capacitor are provided between the rectifier and the first DC/DC converter. A control circuit sets a current target value which is a control target value for the second DC/DC converter, based on the voltage value of a battery bus, and when charging of the electric double layer capacitor is to be stopped based on a charge/discharge instruction signal, performs, before the charging is stopped, control of gradually attenuating the current target value for the second DC/DC converter, based on a voltage value VEDLC of the electric double layer capacitor.Type: ApplicationFiled: June 29, 2011Publication date: October 10, 2013Applicant: Mitsubishi Electric CorporationInventors: Yusuke Higaki, Yuuya Tanaka, Masaki Yamada, Toshiyuki Yoshizawa, Shigeki Harada
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Patent number: 8437910Abstract: A first DC/DC converter is connected to a higher-voltage output terminal of a rectifier by alternator wiring, a battery that supplies electric power to an on-board load is connected to the first DC/DC converter, a second DC/DC converter is connected to the higher-voltage output terminal of the rectifier by alternator wiring, and an electrical double-layer capacitor is connected to the second DC/DC converter.Type: GrantFiled: October 13, 2010Date of Patent: May 7, 2013Assignee: Mitsubishi Electric CorporationInventors: Toshiyuki Yoshizawa, Masaya Inoue, Takahiro Urakabe, Tatsuya Okuda, Yuuya Tanaka, Takayoshi Nagai, Shigeki Harada
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Publication number: 20120158245Abstract: A first DC/DC converter is connected to a higher-voltage output terminal of a rectifier by alternator wiring, a battery that supplies electric power to an on-board load is connected to the first DC/DC converter, a second DC/DC converter is connected to the higher-voltage output terminal of the rectifier by alternator wiring, and an electrical double-layer capacitor is connected to the second DC/DC converter.Type: ApplicationFiled: October 13, 2010Publication date: June 21, 2012Applicant: Mitsubishi Electric CorporationInventors: Toshiyuki Yoshizawa, Masaya Inoue, Takahiro Urakabe, Tatsuya Okuda, Yuuya Tanaka, Takayoshi Nagai, Shigeki Harada
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Publication number: 20120126764Abstract: An object of the present invention is to provide a DC/DC power conversion apparatus that can reduce the average power consumption over a wide range of DC voltage ratios. A control circuit (120) changes a switching frequency f at which IGBTs S1 to S4 perform ON/OFF operation, in accordance with a voltage ratio k (k=V2/V1) for DC voltage conversion, based on the following expressions, such that a magnitude ?I of a current ripple flowing in a reactor Lc is a predetermined constant value irrespective of the voltage ratio k.Type: ApplicationFiled: July 26, 2010Publication date: May 24, 2012Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Takahiro Urakabe, Tatsuya Okuda, Yuuya Tanaka, Masaru Kobayashi, Matahiko Ikeda, Hirotoshi Maekawa
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Publication number: 20120025585Abstract: Provided is a seat pad 1 having a fastener member 4 on a front surface side of a pad body 2 made of a foaming resin, which includes: a ventilation member 5, one end portion of the ventilation member being located in the vicinity of the fastener member 4, and the other end portion of the ventilation member extending on a rear surface side of the pad body 2.Type: ApplicationFiled: March 1, 2010Publication date: February 2, 2012Applicant: BRIDGESTONE CORPORATIONInventors: Masato Oota, Yuuya Tanaka, Toshio Suzuki
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Patent number: 7472880Abstract: To prevent the occurrence of a situation in which a main stand component supporting a main display component from the rear closes and the main display component falls over backward when a main display component that has been placed in a tilted orientation is pushed to the rear. A locking mechanism 7 for keeping a main stand component 4 in a working orientation is added to a display device having a main display component 1 and a main stand component 4 that is attached to the main display component 1 and opens and closes between a storage orientation and a working orientation. The locking mechanism 7 has an engagement body 72 that is constantly biased toward a locked position by a spring 73. A control tab 75 is provided to the engagement body 72.Type: GrantFiled: May 24, 2006Date of Patent: January 6, 2009Assignee: Funai Electric Co., Ltd.Inventors: Masuo Ogawa, Yuuya Tanaka
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Patent number: 7239506Abstract: With a display device in which a main display component is supported in a tilted orientation by a stand unit, the leg of the stand unit will not be pushed in, causing the main display component to readily fall over backwards, even if the main display component in a tilted orientation should be accidentally pushed by hand. A stand unit A has a slider 2 affixed to the upper end of a leg 3, a case 1 that houses the slider 2, and a slider position restriction means 5 for restricting the slider 2 to two positions: an upper position and a lower position. The slider position restriction means 5 is equipped with a cam component 6 and a spring 7. The spring 7 has an engagement component 71, and the cam component 6 is equipped with a upper latching component 61, a lower latching component 62, and a wavy serrated face 65 that links these. The function of increasing the moving resistance when the engagement component 71 moves is imparted to the serrated face 65.Type: GrantFiled: May 24, 2006Date of Patent: July 3, 2007Assignee: Funai Electric Co., Ltd.Inventors: Masuo Ogawa, Yuuya Tanaka
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Publication number: 20070021012Abstract: With a display device in which a main display component is supported in a tilted orientation by a stand unit, the leg of the stand unit will not be pushed in, causing the main display component to readily fall over backwards, even if the main display component in a tilted orientation should be accidentally pushed by hand. A stand unit A has a slider 2 affixed to the upper end of a leg 3, a case 1 that houses the slider 2, and a slider position restriction means 5 for restricting the slider 2 to two positions: an upper position and a lower position. The slider position restriction means 5 is equipped with a cam component 6 and a spring 7. The spring 7 has an engagement component 71, and the cam component 6 is equipped with a upper latching component 61, a lower latching component 62, and a wavy serrated face 65 that links these. The function of increasing the moving resistance when the engagement component 71 moves is imparted to the serrated face 65.Type: ApplicationFiled: May 24, 2006Publication date: January 25, 2007Applicant: FUNAI ELECTRIC CO., LTD.Inventors: Masuo Ogawa, Yuuya Tanaka
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Publication number: 20070018061Abstract: To prevent the occurrence of a situation in which a main stand component supporting a main display component from the rear closes and the main display component falls over backward when a main display component that has been placed in a tilted orientation is pushed to the rear. A locking mechanism 7 for keeping a main stand component 4 in a working orientation is added to a display device having a main display component 1 and a main stand component 4 that is attached to the main display component 1 and opens and closes between a storage orientation and a working orientation. The locking mechanism 7 has an engagement body 72 that is constantly biased toward a locked position by a spring 73. A control tab 75 is provided to the engagement body 72.Type: ApplicationFiled: May 24, 2006Publication date: January 25, 2007Applicant: FUNAI ELECTRIC CO., LTD.Inventors: Masuo Ogawa, Yuuya Tanaka