Patents by Inventor Hiroaki Otani
Hiroaki Otani 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: 20240108197Abstract: A white balance adjustment jig for an endoscope includes: an insertion portion that includes at least one insertion hole into which a distal end part of an endoscope is inserted; a lid portion that is disposed to face the insertion portion; and an outer peripheral portion that is in contact with the insertion portion and the lid portion to form an internal space. The lid portion includes a chart having a plurality of marks on a surface on an insertion portion side, and the chart is inclined with respect to a perpendicular plane perpendicular to the insertion direction of the distal end part.Type: ApplicationFiled: September 26, 2023Publication date: April 4, 2024Applicant: FUJIFILM CorporationInventors: Hiroaki SUZUKI, Kenichi OTANI, Yu YOSHIMORI, Shintaro HATTORI
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Patent number: 10814725Abstract: According to one embodiment, a vehicle controller includes an electric power converter, a plurality of first electric power transmission members, a temperature sensor, and a first controller. The electric power converter converts input electric power and outputs the converted electric power. The plurality of first electric power transmission members transmit the input electric power and are connected in parallel to the electric power converter. The temperature sensor is connected to at least one of the plurality of first electric power transmission members. The first controller determines that at least one of the plurality of first electric power transmission members is disconnected when a temperature detected by the temperature sensor changes.Type: GrantFiled: November 27, 2018Date of Patent: October 27, 2020Assignees: Kabushiki Kaisha Toshiba, Toshiba Infrastructure Systems & Solutions CorporationInventors: Hiroaki Otani, Tomoyuki Makino
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Patent number: 10666130Abstract: According to one embodiment, an electric power conversion system includes a convertor, a detector, a delay controller, and a determinator. The detector is configured to detect information related to a voltage of electric power converted by the converter. The delay controller is configured to delay a conversion operation start of the converter by a first predetermined time with respect to a supply start time at which supply of the electric power is started. The determinator is configured to perform a first determination on the basis of a detection result detected by the detector before elapse of the first predetermined time from the supply start tune, and to perform a second determination on the basis of a detection result detected by the detector after the elapse of the first predetermined time from the supply start time.Type: GrantFiled: September 11, 2018Date of Patent: May 26, 2020Assignees: CENTRAL JAPAN RAILWAY COMPANY, Toshiba Infrastructure Systems & Solutions CorporationInventors: Kenji Sato, Hirokazu Kato, Takafumi Fukushima, Hiroaki Otani, Tomoyuki Makino, Toshiyuki Uchida, Manato Mori
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Patent number: 10611245Abstract: A power conversion system includes a transformer, a power conversion device for travel, a power conversion device for auxiliary power sources, an electrical storage device, and an auxiliary device. The power conversion device for travel converts AC power into power for travel and supplies it to a travel motor. The power conversion device for auxiliary power sources includes an AC to DC conversion unit which converts AC power into DC power, a power conversion unit for AC loads which converts the DC power into AC power and supplies it to an AC load, and a power conversion unit for DC loads which converts DC power to DC power and supplies it to a DC load. The electrical storage device is connected to power lines connecting DC power output terminals of the AC to DC conversion unit and DC power input terminals of both the power conversion units for AC and DC loads.Type: GrantFiled: June 15, 2017Date of Patent: April 7, 2020Assignees: CENTRAL JAPAN RAILWAY COMPANY, TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORPORATIONInventors: Takafumi Fukushima, Noriyuki Taniyama, Shigekazu Okada, Kotaro Oda, Hiroaki Otani, Yasuomi Maki, Kenichi Kikkawa, Tsunehito Fujita, Manato Mori
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Patent number: 10538162Abstract: A power conversion system includes an AC to DC conversion circuit, a voltage detector, a step-down chopper circuit, a power conversion device for auxiliary power sources, and a control unit. The AC to DC conversion circuit converts AC power supplied from overhead wires via a transformer into DC power. The voltage detector detects a voltage of AC power supplied from the transformer. The step-down chopper circuit steps down the voltage of DC power produced through conversion by the AC to DC conversion circuit. The power conversion device for auxiliary power sources converts the DC power stepped down by the step-down chopper circuit into power for driving loads mounted in an electric vehicle and supplies it to the loads. The control unit controls the AC to DC conversion circuit and the step-down chopper circuit such that the voltage of AC power detected by the voltage detector approaches a reference voltage.Type: GrantFiled: June 15, 2017Date of Patent: January 21, 2020Assignees: CENTRAL JAPAN RAILWAY COMPANY, Toshiba Infrastructure Systems & Solutions CorporationInventors: Takafumi Fukushima, Shigekazu Okada, Kotaro Oda, Yasuomi Maki, Tsunehito Fujita, Hiroaki Otani, Kenichi Kikkawa, Manato Mori
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Patent number: 10525838Abstract: A power conversion system includes a transformer, a power conversion device for travel, a power conversion device for auxiliary power sources, and an electrical storage device. The power conversion device for auxiliary power sources includes a first AC to DC conversion unit, a power conversion unit for AC loads, and a power conversion unit for DC loads. The power conversion unit for AC loads converts DC power into AC power and supplies it to an AC load. The power conversion unit for DC loads converts DC power produced through conversion by the first AC to DC conversion unit into DC power and supplies it to a DC load. The electrical storage device is connected to power lines connecting DC power output terminals of the first AC to DC conversion unit and DC power input terminals of both the power conversion units for AC and DC loads.Type: GrantFiled: June 15, 2017Date of Patent: January 7, 2020Assignees: CENTRAL JAPAN RAILWAY COMPANY, Toshiba Infrastructure Systems & Solutions CorporationInventors: Kenji Sato, Masayuki Ueno, Takafumi Fukushima, Shigekazu Okada, Kotaro Oda, Hiroaki Otani, Yasuomi Maki, Kenichi Kikkawa, Tsunehito Fujita, Manato Mori
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Publication number: 20190168614Abstract: According to one embodiment, a vehicle controller includes an electric power converter, a plurality of first electric power transmission members, a temperature sensor, and a first controller. The electric power converter converts input electric power and outputs the converted electric power. The plurality of first electric power transmission members transmit the input electric power and are connected in parallel to the electric power converter. The temperature sensor is connected to at least one of the plurality of first electric power transmission members. The first controller determines that at least one of the plurality of first electric power transmission members is disconnected when a temperature detected by the temperature sensor changes.Type: ApplicationFiled: November 27, 2018Publication date: June 6, 2019Applicants: Kabushiki Kaisha Toshiba, Toshiba Infrastructure Systems & Solutions CorporationInventors: Hiroaki Otani, Tomoyuki Makino
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Patent number: 10259326Abstract: A car control device according to an embodiment includes a converter and an inverter, a first contactor disposed between the transformer and the converter, a second contactor and a resistor connected in series with each other and in parallel with the first contactor, a first voltage detector and a second voltage detector disposed between the converter and the inverter, and a control unit. After the second contactor is closed and before the first contactor is closed, the control unit calculates a voltage difference between a first voltage value detected by the first voltage detector and a second voltage value detected by the second voltage detector, compares the calculated voltage difference with a predefined threshold value, and determines that at least one of the first voltage detector and the second voltage detector malfunctions when the voltage difference is greater than the threshold value.Type: GrantFiled: December 19, 2016Date of Patent: April 16, 2019Assignee: KABUSHIKI KAISHA TOSHIBAInventor: Hiroaki Otani
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Publication number: 20190081552Abstract: According to one embodiment, an electric power conversion system includes a convertor, a detector, a delay controller, and a deteminator. The detector is configured to detect information related to a voltage of electric power converted by the converter. The delay controller is configured to delay a conversion operation start of the converter by a first predetermined time with respect to a supply start time at which supply of the electric power is started. The determinator is configured to perform a first determination on the basis of a detection result detected by the detector before elapse of the first predetermined time from the supply start tune, and to perform a second determination on the basis of a detection result detected by the detector after the elapse of the first predetermined time from the supply start time.Type: ApplicationFiled: September 11, 2018Publication date: March 14, 2019Applicants: CENTRAL JAPAN RAILWAY COMPANY, Toshiba Infrastructure Systems & Solutions CorporationInventors: Kenji SATO, Hirokazu KATO, Takafumi FUKUSHIMA, Hiroaki OTANI, Tomoyuki MAKINO, Toshiyuki UCHIDA, Manato MORI
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Publication number: 20180215284Abstract: An electric car control device according to the embodiments includes a housing, a converter, an inverter, a converter cooling unit, and an inverter cooling unit. The housing is provided under a floor of a car body. The converter is housed in the housing, is connected to an alternating current power source, and converts supplied alternating current power into direct current power. The inverter is housed in the housing, and converts the direct current power into alternating current power for driving a motor. The converter cooling unit is disposed on a bottom surface side of the housing and cools the converter. The inverter cooling unit is disposed on a bottom surface side of the housing and cools the inverter.Type: ApplicationFiled: March 7, 2018Publication date: August 2, 2018Applicants: Kabushiki Kaisha Toshiba, Toshiba Infrastructure Systems & Solutions CorporationInventors: Hiroaki OTANI, Tomoyuki MAKINO
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Patent number: 10005362Abstract: An electric vehicle control device includes: a plurality of motors capable of transmitting motive power to a wheel of an electric vehicle; an inverter that supplies electric power to drive the motors; and a controller that controls the inverter and compares, when the electric vehicle drives under a certain velocity condition, a q-axis voltage feedforward value VqFF and a q-axis voltage command value Vq* used for controlling driving of the motors, to detect an occurrence of miswire between the motors and the inverter when the following inequation is satisfied: VqFF?1.5·Vq*.Type: GrantFiled: December 15, 2014Date of Patent: June 26, 2018Assignees: Central Japan Railway Company, TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORPORATIONInventors: Hirokazu Kato, Hiroki Shimoyama, Kei Sakanoue, Toshiyuki Uchida, Tomoyuki Makino, Hiroaki Otani, Manato Mori
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Publication number: 20170361713Abstract: A power conversion system includes a transformer, a power conversion device for travel, a power conversion device for auxiliary power sources, an electrical storage device, and an auxiliary device. The power conversion device for travel converts AC power into power for travel and supplies it to a travel motor. The power conversion device for auxiliary power sources includes an AC to DC conversion unit which converts AC power into DC power, a power conversion unit for AC loads which converts the DC power into AC power and supplies it to an AC load, and a power conversion unit for DC loads which converts DC power to DC power and supplies it to a DC load. The electrical storage device is connected to power lines connecting DC power output terminals of the AC to DC conversion unit and DC power input terminals of both the power conversion units for AC and DC loads.Type: ApplicationFiled: June 15, 2017Publication date: December 21, 2017Applicants: CENTRAL JAPAN RAILWAY COMPANY, Kabushiki Kaisha ToshibaInventors: Takafumi FUKUSHIMA, Noriyuki TANIYAMA, Shigekazu OKADA, Kotaro ODA, Hiroaki OTANI, Yasuomi MAKI, Kenichi KIKKAWA, Tsunehito FUJITA, Manato MORI
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Publication number: 20170361716Abstract: A power conversion system includes a transformer, a power conversion device for travel, a power conversion device for auxiliary power sources, and an electrical storage device. The power conversion device for auxiliary power sources includes a first AC to DC conversion unit, a power conversion unit for AC loads, and a power conversion unit for DC loads. The power conversion unit for AC loads converts DC power into AC power and supplies it to an AC load. The power conversion unit for DC loads converts DC power produced through conversion by the first AC to DC conversion unit into DC power and supplies it to a DC load. The electrical storage device is connected to power lines connecting DC power output terminals of the first AC to DC conversion unit and DC power input terminals of both the power conversion units for AC and DC loads.Type: ApplicationFiled: June 15, 2017Publication date: December 21, 2017Applicants: CENTRAL JAPAN RAILWAY COMPANY, Kabushiki Kaisha ToshibaInventors: Kenji SATO, Masayuki UENO, Takafumi FUKUSHIMA, Shigekazu OKADA, Kotaro ODA, Hiroaki OTANI, Yasuomi MAKI, Kenichi KIKKAWA, Tsunehito FUJITA, Manato MORI
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Publication number: 20170361711Abstract: A power conversion system includes an AC to DC conversion circuit, a voltage detector, a step-down chopper circuit, a power conversion device for auxiliary power sources, and a control unit. The AC to DC conversion circuit converts AC power supplied from overhead wires via a transformer into DC power. The voltage detector detects a voltage of AC power supplied from the transformer. The step-down chopper circuit steps down the voltage of DC power produced through conversion by the AC to DC conversion circuit. The power conversion device for auxiliary power sources converts the DC power stepped down by the step-down chopper circuit into power for driving loads mounted in an electric vehicle and supplies it to the loads. The control unit controls the AC to DC conversion circuit and the step-down chopper circuit such that the voltage of AC power detected by the voltage detector approaches a reference voltage.Type: ApplicationFiled: June 15, 2017Publication date: December 21, 2017Applicants: CENTRAL JAPAN RAILWAY COMPANY, Kabushiki Kaisha ToshibaInventors: Takafumi FUKUSHIMA, Shigekazu OKADA, Kotaro ODA, Yasuomi MAKI, Tsunehito FUJITA, Hiroaki OTANI, Kenichi KIKKAWA, Manato MORI
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Patent number: 9837950Abstract: A vehicle control device according to one embodiment includes an inverter converting a DC power to a three-phase AC power and supplying the three-phase AC power to a motor driving a vehicle. A detector detects a current value between the inverter and the motor. A controller PWM-controls the inverter based on a current value detected by the detector, a speed command signal, and a rotor frequency of the motor. The controller determines occurrence of a malfunction when a PWM modulation rate is equal to or higher than a predetermined value and the rotor frequency is equal to or lower than a predetermined value.Type: GrantFiled: January 25, 2016Date of Patent: December 5, 2017Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Hiroaki Otani, Masanao Itoh
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Publication number: 20170158057Abstract: A car control device according to an embodiment includes a converter and an inverter, a first contactor disposed between the transformer and the converter, a second contactor and a resistor connected in series with each other and in parallel with the first contactor, a first voltage detector and a second voltage detector disposed between the converter and the inverter, and a control unit. After the second contactor is closed and before the first contactor is closed, the control unit calculates a voltage difference between a first voltage value detected by the first voltage detector and a second voltage value detected by the second voltage detector, compares the calculated voltage difference with a predefined threshold value, and determines that at least one of the first voltage detector and the second voltage detector malfunctions when the voltage difference is greater than the threshold value.Type: ApplicationFiled: December 19, 2016Publication date: June 8, 2017Applicant: KABUSHIKI KAISHA TOSHIBAInventor: Hiroaki OTANI
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Patent number: 9555815Abstract: According to one embodiment, an electric power conversion device includes an inverter which converts DC power into AC power and supplies the AC power to electric equipment of a railway vehicle, a battery capable of storing DC power, and a converter which converts the AC power into DC power and charges the battery. The battery supplies electric power to the inverter when the electric power is not supplied to the inverter from an external power source.Type: GrantFiled: February 14, 2014Date of Patent: January 31, 2017Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Michiaki Ishikawa, Hiroaki Otani
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Publication number: 20160339783Abstract: An electric vehicle control device includes: a plurality of motors capable of transmitting motive power to a wheel of an electric vehicle; an inverter that supplies electric power to drive the motors; and a controller that controls the inverter and compares, when the electric vehicle drives under a certain velocity condition, a q-axis voltage feedforward value VqFF and a q-axis voltage command value Vq* used for controlling driving of the motors, to detect an occurrence of miswire between the motors and the inverter when the following inequation is satisfied: VqFF?1.5·Vq*.Type: ApplicationFiled: December 15, 2014Publication date: November 24, 2016Applicants: Central Japan Railway Company, Kabushiki Kaisha ToshibaInventors: Hirokazu KATO, Hiroki SHIMOYAMA, Kei SAKANOUE, Toshiyuki UCHIDA, Tomoyuki MAKINO, Hiroaki OTANI, Manato MORI
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Publication number: 20160142004Abstract: A vehicle control device according to one embodiment includes an inverter converting a DC power to a three-phase AC power and supplying the three-phase AC power to a motor driving a vehicle. A detector detects a current value between the inverter and the motor. A controller PWM-controls the inverter based on a current value detected by the detector, a speed command signal, and a rotor frequency of the motor. The controller determines occurrence of a malfunction when a PWM modulation rate is equal to or higher than a predetermined value and the rotor frequency is equal to or lower than a predetermined value.Type: ApplicationFiled: January 25, 2016Publication date: May 19, 2016Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Hiroaki OTANI, Masanao ITOH
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Publication number: 20150061377Abstract: According to one embodiment, an electric power conversion device includes an inverter which converts DC power into AC power and supplies the AC power to electric equipment of a railway vehicle, a battery capable of storing DC power, and a converter which converts the AC power into DC power and charges the battery. The battery supplies electric power to the inverter when the electric power is not supplied to the inverter from an external power source.Type: ApplicationFiled: February 14, 2014Publication date: March 5, 2015Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Michiaki ISHIKAWA, Hiroaki OTANI