Patents by Inventor Shuhei Fujiwara
Shuhei Fujiwara 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: 11309787Abstract: A power conversion device includes a conversion circuit constituted of a plurality of arm circuits and a bypass circuit. The bypass circuit includes a full-wave rectification circuit, a positive-side connection arm, and a negative-side connection arm. The full-wave rectification circuit is connected between a plurality of AC connections, a positive-side intermediate node, and a negative-side intermediate node, and configured to convert AC voltages generated at the plurality of AC connections into a DC voltage across the positive-side intermediate node and the negative-side intermediate node and output the DC voltage. The positive-side connection arm blocks a current in a direction from a positive-side DC terminal toward the positive-side intermediate node. The negative-side connection arm is connected between the negative-side intermediate node and a negative-side DC terminal and blocks a current in a direction from the negative-side intermediate node toward a negative-side DC terminal.Type: GrantFiled: June 5, 2018Date of Patent: April 19, 2022Assignee: MITSUBISHII ELECTRIC CORPORATIONInventors: Yoshiyuki Kono, Shuhei Fujiwara, Ryosuke Uda, Shigeo Hayashi
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Patent number: 11283369Abstract: A control device for controlling a power source connected to an alternating-current (AC) power system includes: a frequency control unit that controls a frequency of the power source operating in a constant-voltage constant-frequency control scheme; a power calculation unit that calculates, when the frequency control unit varies a frequency of the power source, a variation of an effective power output from the power source; an arithmetic unit that calculates a frequency characteristics constant of the AC power system, based on a variation of the frequency of the power source and the variation of the effective power output from the power source; and a selection unit that selects a control scheme for the power source, based on the frequency characteristics constant of the AC power system.Type: GrantFiled: June 7, 2018Date of Patent: March 22, 2022Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Shuhei Fujiwara, Yoshiyuki Kono, Kazuyori Tahata, Masashi Shigemitsu, Shota Midorikawa
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Publication number: 20220029524Abstract: A power converter includes an arm in which a plurality of converter cells are connected in series, each of the converter cells including at least two switching elements, a power storage element, and a pair of output terminals. A control device controls the power converter. The converter cell includes a switch to have the converter cell bypassed. When the control device senses failure of the converter cell, it has the failed converter cell within the arm bypassed and controls a normal converter cell within the arm to suppress a ratio of a harmonic component in an arm current that increases due to the failure.Type: ApplicationFiled: December 25, 2018Publication date: January 27, 2022Applicant: Mitsubishi Electric CorporationInventors: Takuya KAJIYAMA, Toshiyuki FUJII, Shuhei FUJIWARA, Ryosuke UDA, Kazuyori TAHATA
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Publication number: 20220014114Abstract: A power converter includes an arm in which a plurality of converter cells are connected in series, each of the converter cells including at least two switching elements, a power storage element, and a pair of output terminals. A control device controls voltages of the plurality of converter cells by phase shift PWM control using a carrier signal for each converter cell. The converter cell includes a switch to have the converter cell bypassed. When the control device senses failure of the converter cell within the arm, it has a failed converter cell within the arm bypassed and rectifies uneven intervals among phases of carrier signals of a plurality of normal converter cells within the arm caused by failure of the converter cell.Type: ApplicationFiled: December 25, 2018Publication date: January 13, 2022Applicant: Mitsubishi Electric CorporationInventors: Takuya KAJIYAMA, Toshiyuki FUJII, Shuhei FUJIWARA, Ryosuke UDA, Kazuyori TAHATA
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Publication number: 20210408895Abstract: A power converter includes an arm in which a plurality of converter cells are connected in series, each of the converter cells including at least two switching elements, a power storage element and a pair of output terminals. A control device controls the power converter. The converter cell includes a switch to have the converter cell bypassed. When the control device senses failure of the converter cell, it has the failed converter cell bypassed, estimates an output voltage lost by bypassing the failed converter cell, and has a normal converter cell supply the estimated output voltage of the failed converter cell.Type: ApplicationFiled: December 25, 2018Publication date: December 30, 2021Applicant: Mitsubishi Electric CorporationInventors: Takuya KAJIYAMA, Toshiyuki FUJII, Shuhei FUJIWARA, Ryosuke UDA, Kazuyori TAHATA
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Patent number: 11031882Abstract: A power conversion device includes power conversion circuitry including a plurality of submodules connected in series to each other. The power conversion device further includes: a signal reception unit configured to receive a signal representing a voltage of a capacitor in each of the submodules; a time calculation unit configured to calculate at least one of a charging time of the capacitor and a discharging time of the capacitor based on the signal; and a determination unit configured to determine whether the capacitor has degraded or not based on at least one of a first result of comparison of the charging time with a reference charging time serving as a reference for determining degradation of the capacitor, and a second result of comparison of the discharging time with a reference discharging time serving as a reference for determining degradation of the capacitor.Type: GrantFiled: May 26, 2017Date of Patent: June 8, 2021Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Kazuyori Tahata, Yoshiyuki Kono, Kenichi Kuroda, Shuhei Fujiwara, Ryosuke Uda
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Publication number: 20210099102Abstract: A power conversion device includes power conversion circuitry including a plurality of submodules connected in series to each other. The power conversion device further includes: a signal reception unit configured to receive a signal representing a voltage of a capacitor in each of the submodules; a time calculation unit configured to calculate at least one of a charging time of the capacitor and a discharging time of the capacitor based on the signal; and a determination unit configured to determine whether the capacitor has degraded or not based on at least one of a first result of comparison of the charging time with a reference charging time serving as a reference for determining degradation of the capacitor, and a second result of comparison of the discharging time with a reference discharging time serving as a reference for determining degradation of the capacitor.Type: ApplicationFiled: May 26, 2017Publication date: April 1, 2021Applicant: Mitsubishi Electric CorporationInventors: Kazuyori TAHATA, Yoshiyuki KONO, Kenichi KURODA, Shuhei FUJIWARA, Ryosuke UDA
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Publication number: 20210091661Abstract: A power conversion device includes a conversion circuit constituted of a plurality of arm circuits and a bypass circuit. The bypass circuit includes a full-wave rectification circuit, a positive-side connection arm, and a negative-side connection arm. The full-wave rectification circuit is connected between a plurality of AC connections, a positive-side intermediate node, and a negative-side intermediate node, and configured to convert AC voltages generated at the plurality of AC connections into a DC voltage across the positive-side intermediate node and the negative-side intermediate node and output the DC voltage. The positive-side connection arm blocks a current in a direction from a positive-side DC terminal toward the positive-side intermediate node. The negative-side connection arm is connected between the negative-side intermediate node and a negative-side DC terminal and blocks a current in a direction from the negative-side intermediate node toward a negative-side DC terminal.Type: ApplicationFiled: June 5, 2018Publication date: March 25, 2021Applicant: Mitsubishi Electric CorporationInventors: Yoshiyuki KONO, Shuhei FUJIWARA, Ryosuke UDA, Shigeo HAYASHI
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Publication number: 20210021210Abstract: A control device for controlling a power source connected to an alternating-current (AC) power system includes: a frequency control unit that controls a frequency of the power source operating in a constant-voltage constant-frequency control scheme; a power calculation unit that calculates, when the frequency control unit varies a frequency of the power source, a variation of an effective power output from the power source; an arithmetic unit that calculates a frequency characteristics constant of the AC power system, based on a variation of the frequency of the power source and the variation of the effective power output from the power source; and a selection unit that selects a control scheme for the power source, based on the frequency characteristics constant of the AC power system.Type: ApplicationFiled: June 7, 2018Publication date: January 21, 2021Applicant: Mitsubishi Electric CorporationInventors: Shuhei FUJIWARA, Yoshiyuki KONO, Kazuyori TAHATA, Masashi SHIGEMITSU, Shota MIDORIKAWA
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Patent number: 10707790Abstract: The present electric power generation control device includes: an event detection unit which detects an event attributable to a deterioration in the balance between a torque input to a generator and an effective power output by the generator, the deterioration being caused by a reduction in a set value of the effective power received from the generator by an electric power converter when the electric power converter has detected a failure necessitating interruption of electric power transmission from the generator by a direct-current (DC) power transmission unit, the DC power transmission unit transmitting DC power, the electric power converter connecting a generator to the DC power transmission unit; and a torque command reduction unit which causes a reduction in a torque command to a motor when the event detection unit has detected the event attributable to the deterioration in the balance, the motor outputting the torque input to the generator.Type: GrantFiled: December 2, 2015Date of Patent: July 7, 2020Assignees: MITSUBISHI HEAVY INDUSTRIES, LTD., MITSUBISHI ELECTRIC CORPORATIONInventors: Masayuki Hashimoto, Tsuyoshi Wakasa, Yoshiyuki Kono, Shuhei Fujiwara
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Patent number: 9896053Abstract: A side airbag apparatus is provided between a vehicle body and a back seat, and includes a base housing configured to house an airbag and an inflator, a base member having upper and lower base attachment portions provided to sandwich the base housing in an upper-to-lower direction and attached to a portion of the vehicle body, and a retainer member configured to hold the base housing from a vehicle back side. Right and left engagement claws at an upper end of a back wall of the retainer member are arranged to engage respectively with engagement holes provided at a portion of the vehicle body on the vehicle back side. A virtual plane passing through the upper and lower base attachment portions and extending along a vehicle front-to-back direction passes between the right and left engagement claws.Type: GrantFiled: August 4, 2016Date of Patent: February 20, 2018Assignee: HONDA MOTOR CO., LTD.Inventors: Jinichi Tanabe, Tatsuo Sayama, Hidetsune Nonaka, Shuhei Fujiwara, Yoshihiko Morita
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Publication number: 20180026562Abstract: The present electric power generation control device includes: an event detection unit which detects an event attributable to a deterioration in the balance between a torque input to a generator and an effective power output by the generator, the deterioration being caused by a reduction in a set value of the effective power received from the generator by an electric power converter when the electric power converter has detected a failure necessitating interruption of electric power transmission from the generator by a direct-current (DC) power transmission unit, the DC power transmission unit transmitting DC power, the electric power converter connecting a generator to the DC power transmission unit; and a torque command reduction unit which causes a reduction in a torque command to a motor when the event detection unit has detected the event attributable to the deterioration in the balance, the motor outputting the torque input to the generator.Type: ApplicationFiled: December 2, 2015Publication date: January 25, 2018Inventors: Masayuki HASHIMOTO, Tsuyoshi WAKASA, Yoshiyuki KONO, Shuhei FUJIWARA
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Patent number: 9630584Abstract: A mounting structure of air bag device on vehicle body includes: a seat side block long in a vertical direction disposed on a side of a backrest portion of a seat; and an air bag unit including an inflator that injects high pressure gas at a time of application of an impact and a bag body that is deployed upon receiving the high pressure gas of the inflator. The airbag unit is built in the seat side block. The air bag unit along with the seat side block is mounted on a vehicle body side member. Retaining pieces are protrudingly provided in a retainer of the seat side block that holds the inflator and are inserted in openings of the vehicle body side member.Type: GrantFiled: July 7, 2015Date of Patent: April 25, 2017Assignee: HONDA MOTOR CO., LTD.Inventors: Shuhei Fujiwara, Yoshihiko Morita
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Publication number: 20170036635Abstract: A side airbag apparatus is provided between a vehicle body and a back seat, and includes a base housing configured to house an airbag and an inflator, a base member having upper and lower base attachment portions provided to sandwich the base housing in an upper-to-lower direction and attached to a portion of the vehicle body, and a retainer member configured to hold the base housing from a vehicle back side. Right and left engagement claws at an upper end of a back wall of the retainer member are arranged to engage respectively with engagement holes provided at a portion of the vehicle body on the vehicle back side. A virtual plane passing through the upper and lower base attachment portions and extending along a vehicle front-to-back direction passes between the right and left engagement claws.Type: ApplicationFiled: August 4, 2016Publication date: February 9, 2017Applicant: HONDA MOTOR CO., LTD.Inventors: Jinichi Tanabe, Tatsuo Sayama, Hidetsune Nonaka, Shuhei Fujiwara, Yoshihiko Morita
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Patent number: 9463768Abstract: A side airbag apparatus can suppress the deformation of the periphery of a storage case by reducing a gas pressure applied to the storage case for storing an airbag when the airbag expands. A side airbag apparatus installed between a vehicle body and a rear seat includes a base storage portion that stores an airbag and an inflator. The upper and lower ends of an opening formed on the front side of the vehicle body in the base storage portion are provided with gas pressure relief portions for relieving the gas pressure generated when the airbag expands and deploys toward the vehicle body front side. The gas pressure relief portions are formed to make their widths narrower sequentially from the upper and lower ends of the opening toward the outside of the opening.Type: GrantFiled: July 14, 2015Date of Patent: October 11, 2016Assignees: TS Tech Co., Ltd., Honda Motor Co., Ltd.Inventors: Jinichi Tanabe, Kazuhiro Hayashi, Yoshihiko Morita, Shuhei Fujiwara
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Patent number: 9457757Abstract: A mounting member to be mounted to an obverse side of a cover part arranged at a central portion of a steering wheel includes corner parts 31a, 31b, 31c, and 31d having hook parts 36-3, 36-4, 36-5, and 36-6 protruding from their reverse sides, the hook parts 36-3, 36-4, 36-5, and 36-6 being capable of interlocking with holes formed at the cover part. The hook parts 36-3, 36-4, 36-5, and 36-6 are arranged at narrow parts 37a and 37b between a contour 33 of the mounting member 30 and openings 35a and 35b formed along the contour 33.Type: GrantFiled: September 9, 2013Date of Patent: October 4, 2016Assignee: Takata CorporationInventors: Takumi Kawabe, Shuhei Fujiwara, Keisuke Onohara, Kouhei Nagashima
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Publication number: 20160009248Abstract: A side airbag apparatus can suppress the deformation of the periphery of a storage case by reducing a gas pressure applied to the storage case for storing an airbag when the airbag expands. A side airbag apparatus installed between a vehicle body and a rear seat includes a base storage portion that stores an airbag and an inflator. The upper and lower ends of an opening formed on the front side of the vehicle body in the base storage portion are provided with gas pressure relief portions for relieving the gas pressure generated when the airbag expands and deploys toward the vehicle body front side. The gas pressure relief portions are formed to make their widths narrower sequentially from the upper and lower ends of the opening toward the outside of the opening.Type: ApplicationFiled: July 14, 2015Publication date: January 14, 2016Inventors: Jinichi Tanabe, Kazuhiro Hayashi, Yoshihiko Morita, Shuhei Fujiwara
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Publication number: 20160009247Abstract: A mounting structure of air bag device on vehicle body includes: a seat side block long in a vertical direction disposed on a side of a backrest portion of a seat; and an air bag unit including an inflator that injects high pressure gas at a time of application of an impact and a bag body that is deployed upon receiving the high pressure gas of the inflator. The airbag unit is built in the seat side block. The air bag unit along with the seat side block is mounted on a vehicle body side member. Retaining pieces are protrudingly provided in a retainer of the seat side block that holds the inflator and are inserted in openings of the vehicle body side member.Type: ApplicationFiled: July 7, 2015Publication date: January 14, 2016Applicant: HONDA MOTOR CO., LTD.Inventors: Shuhei Fujiwara, Yoshihiko Morita
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Publication number: 20150239417Abstract: A mounting member to be mounted to an obverse side of a cover part arranged at a central portion of a steering wheel includes corner parts 31a, 31b, 31c, and 31d having hook parts 36-3, 36-4, 36-5, and 36-6 protruding from their reverse sides, the hook parts 36-3, 36-4, 36-5, and 36-6 being capable of interlocking with holes formed at the cover part. The hook parts 36-3, 36-4, 36-5, and 36-6 are arranged at narrow parts 37a and 37b between a contour 33 of the mounting member 30 and openings 35a and 35b formed along the contour 33.Type: ApplicationFiled: September 9, 2013Publication date: August 27, 2015Applicant: Takata CorporationInventors: Takumi Kawabe, Shuhei Fujiwara, Keisuke Onohara, Kouhei Nagashima
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Publication number: 20100198100Abstract: A bioelectrical impedance measurement abdomen attachment unit (100A) includes an abdomen rear surface side base portion (110A), an abdomen front surface side base portion (120A), and a pair of abdomen front surface side belt members (143a, 143b). The abdomen front surface side base portion (120A) includes a sheet (122) arranged with a pair of wind-up units (130a, 130b), and an electrode film (126) arranged with an impedance measurement electrode (128). Each wind-up unit (130a, 130b) includes a wind-up mechanism for accommodating the abdomen front surface side belt members (143a, 143b) in a winding manner, where the abdomen front surface side belt member (143a, 143b) is pulled out and connected to the abdomen rear surface side base portion (110A) by way of a connection tool in the attached state.Type: ApplicationFiled: June 5, 2008Publication date: August 5, 2010Applicant: OMRON HEALTHCARE CO., LTD.Inventors: Shojiro Oku, Toshikazu Shiga, Yoshitake Oshima, Toshihiko Abe, Shuhei Fujiwara, Josuke Ebisu, Akihisa Narai