Patents Assigned to Central Japan Railway Company
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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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Patent number: 9984806Abstract: Provided is a coil mounting structure for a device that comprises a primary coil to be supplied with an alternating current, and a secondary coil arranged facing the primary coil and configured to supply an electric power to a load provided in a housing by using an induced voltage generated by an electromagnetic field produced by the primary coil. The coil mounting structure comprises at least one mounting part provided in a region of the housing, the region facing the primary coil, and the at least one mounting part is configured to hold the secondary coil to the housing. The at least one mounting part comprises at least one gap area configured to interrupt a circuit generated by the at least one mounting part.Type: GrantFiled: March 11, 2015Date of Patent: May 29, 2018Assignee: CENTRAL JAPAN RAILWAY COMPANYInventors: Daisuke Shimode, Toshiaki Murai, Yoshiyasu Hagiwara, Masayuki Tobikawa, Yukio Takahashi
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Publication number: 20180109143Abstract: An equivalent circuit of a converter (4) is represented by a series connection between an equivalent capacitor (41) and an equivalent resistor (42), and the converter (4) includes a controller that adjusts a power factor of the input power by controlling a capacitive reactance (Xc) of the equivalent capacitor (41).Type: ApplicationFiled: April 13, 2016Publication date: April 19, 2018Applicants: CENTRAL JAPAN RAILWAY COMPANY, TOYO ELECTRIC MFG. CO., LTD.Inventors: Yuki KASHIWAGI, Toshiaki MURAI, Yoshiyasu HAGIWARA, Tadashi SAWADA, Takayoshi TANAKA, Takehisa KASHIMA
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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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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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Patent number: 9751538Abstract: Provided is a sound absorbing panel that can satisfy the heat resistance properties and melting/dripping resistance properties required inside of a railway vehicle. A pier sound absorbing panel includes five sheets of first through fifth glass cloths that are stacked on an aluminum base plate. The edge section of the fifth glass cloth is affixed to the rear surface of the base plate using an adhesive, and the first through fourth glass cloths are fastened using staples. In other words, the first glass cloth and the base plate are fixed using an adhesive, and this adhesive is prevented from melting by the five sheets of the first through fifth glass cloths. The adhesive that fixes the edge section of the fifth glass cloth at the other surface of the base plate is prevented from melting by the five sheets of the first through fifth glass cloths and the base plate.Type: GrantFiled: October 31, 2013Date of Patent: September 5, 2017Assignees: CENTRAL JAPAN RAILWAY COMPANY, NIPPON SHARYO, LTD.Inventors: Yukio Takahashi, Hiroki Tsunoda, Yuya Futamura, Koichi Hayashi, Naoya Ozawa, Masaki Hase, Naoyuki Maruyama
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Patent number: 9707983Abstract: Providing a track status monitoring device comprising an acceleration detection unit disposed on a railway car and detecting an acceleration at least in the axle direction among accelerations generated on a wheel of the railway car; a rail position detection unit disposed on the railway car and detecting a value indicating a position of the rail in relation to the wheel in the axle direction; an integration unit that calculates a value based on a 2nd-order integrated value of the acceleration detected by the acceleration detection unit; and a subtraction unit that counterbalances an undulating component of the wheel by subtracting a value detected by the rail position detection unit from a value calculated by the integration unit, and calculates an amount of horizontal-direction displacement of the rail.Type: GrantFiled: April 25, 2013Date of Patent: July 18, 2017Assignee: CENTRAL JAPAN RAILWAY COMPANYInventors: Yoshinobu Soda, Iwao Masuda
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Patent number: 9663119Abstract: Provided are a railroad vehicle that makes it possible to maintain the air tightness of a door and a plug door for a railroad vehicle. A second rail is provided parallel to a first rail in the longitudinal direction of a vehicle body above the leading edge side (door side) of a plug rail. The second rail supports the leading edge side of the plug rail. As a result, both edges of the plug rail are supported by the first rail and the second rail. Dangling of the leading edge side of the plug rail is thus prevented even when the plug distance (the distance that the door moves in the vehicle body width direction) is long. In this way, it is possible to block the doorway without leaving a gap using the door and to maintain the air tightness of the door.Type: GrantFiled: October 31, 2013Date of Patent: May 30, 2017Assignees: CENTRAL JAPAN RAILWAY COMPANY NIPPON SHARYO, LTD., NIPPON SHARYO, LTD., NABTESCO CORPORATIONInventors: Yukio Takahashi, Hiroki Tsunoda, Soshi Kawakami, Yuya Futamura, Tomoyuki Fukunaga, Tadahiro Mitsuda, Genta Sakaki
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Patent number: 9654031Abstract: A controlling apparatus includes a storage unit for storing, for each sampling period, a combination of a primary frequency of connected induction motors and the amplitude of a voltage command value, and a gradient detection unit for calculating a value corresponding to an increase in the amplitude of the voltage command value divided by an increase in the primary frequency, and for outputting a failure signal upon determining, when a result of the division is less than a predetermined reference value, that the plurality of induction motors include at least one induction motor having a phase sequence that includes incorrect wiring with respect to the power converter.Type: GrantFiled: June 8, 2016Date of Patent: May 16, 2017Assignees: CENTRAL JAPAN RAILWAY COMPANY, FUJI ELECTRIC CO., LTD.Inventors: Kei Sakanoue, Hirokazu Kato, Hiroki Shimoyama, Tomotaka Nishijima, Junichi Ishii, Yasushi Matsumoto, Toshie Kikuchi
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Publication number: 20170129362Abstract: The present invention of one aspect relates to a railway vehicle having a plurality of electrical circuits. The railway vehicle comprises: an external power supply connection portion; a contactor of a normally closed type that opens and closes a common line connecting the plurality of electrical circuits to a ground, the contractor opening the common line by receiving supply of electric power through the external power supply connection portion and closing the common line when no current is applied; and an operation prohibition determining unit that determines whether supply of electric power to the plurality of electrical circuits is stopped and that prohibits the contactor from opening the common line when the supply of electric power is not stopped.Type: ApplicationFiled: July 1, 2015Publication date: May 11, 2017Applicant: CENTRAL JAPAN RAILWAY COMPANYInventors: Kei SAKANOUE, Masashi FURUYA, Hirokazu KATO, Shigekazu OKADA
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Patent number: 9632564Abstract: In a power supply device, the bridge circuit is configured by connecting, in parallel, a plurality of series circuits of an inverse-parallel connection circuit of a semiconductor switch and a diode. A control unit controls switching of a semiconductor switch so that a voltage v between AC terminals becomes zero voltage in equal periods ? before and after a center point shifted from one zero crossing point in one cycle of the input current by a compensation period (angle) ? calculated from a voltage applied to a resonance circuit constituted by the power receiving coil and a resonance capacitor Cr and an induced voltage of the power receiving coil, and becomes a positive-negative voltage whose peak value is the voltage Vo between DC terminals in other periods.Type: GrantFiled: June 10, 2014Date of Patent: April 25, 2017Assignees: CENTRAL JAPAN RAILWAY COMPANY, FUJI ELECTRIC CO., LTD.Inventors: Toshiaki Murai, Yoshiyasu Hagiwara, Tadashi Sawada, Masayuki Tobikawa, Ayako Saga, Michio Tamate, Koji Maruyama, Tomotaka Nishijima
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Patent number: 9608539Abstract: In a power supply device the bridge circuit is configured such that a plurality of series circuits of two inverse parallel connection circuits of a semiconductor switch and a diode are connected in parallel. The power supply device includes a control unit configured to control the semiconductor switch such that a voltage between AC terminals of the bridge circuit becomes a zero voltage only during a prescribed time period before and after two zero crossing points in one cycle of the input current and such that the voltage becomes a positive-negative voltage in which the output voltage is a peak current value during other time periods. Consequently, a power factor of the power receiving circuit is improved and a loss of an entire device is inhibited, and a size and a cost of the entire device may be reduced.Type: GrantFiled: March 7, 2014Date of Patent: March 28, 2017Assignees: CENTRAL JAPAN RAILWAY COMPANY, FUJI ELECTRIC CO., LTD.Inventors: Ayako Ichinose, Michio Tamate, Koji Maruyama, Tomotaka Nishijima
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Patent number: 9590428Abstract: An electric power receiving device in one aspect of embodiments of the present disclosure comprises an electric power receiving section and a converting section. The converting section comprises a compensation voltage generating section. The compensation voltage generating section generates a compensation voltage capable of canceling out a reactance component in the electric power receiving section, and applies the compensation voltage to the electric power receiving section. The compensation voltage generating section comprises a phase changing section, a physical quantity detecting section, and a searching section. The searching section searches a target phase of the compensation voltage that brings the electric power receiving device into a substantially resonant state, based on a physical quantity detected by the physical quantity detecting section.Type: GrantFiled: March 3, 2015Date of Patent: March 7, 2017Assignee: CENTRAL JAPAN RAILWAY COMPANYInventors: Yuki Kashiwagi, Toshiaki Murai, Yoshiyasu Hagiwara, Tadashi Sawada
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Patent number: 9548674Abstract: An electric power receiving device according to the invention receives an electric power from a primary coil, with which a first alternating voltage is applied and through which a first alternate current flows. The device includes an electric power receiving section and a reducing-voltage generating section. The receiving section includes a secondary coil electromagnetically coupled to the primary coil and a capacitor connected to the secondary coil, and generates a second alternating voltage based upon the first alternating current. The generating section generates a reducing-voltage and applies the reducing-voltage to the receiving section, the reducing-voltage being capable of reducing a reactance voltage generated in the receiving section by a second alternating current generated in the receiving section due to the second alternating voltage, and the reducing-voltage being approximately equal to the second alternating voltage in frequency.Type: GrantFiled: December 15, 2011Date of Patent: January 17, 2017Assignee: CENTRAL JAPAN RAILWAY COMPANYInventors: Toshiaki Murai, Daisuke Shimode, Tadashi Sawada
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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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Patent number: 9500192Abstract: A compressed air supply apparatus includes a control unit configured to operate an air compressor when a measurement value of a pressure measurement unit reaches a first pressure or less, and configured to stop the air compressor when the measurement value reaches a second pressure higher than the first pressure, and a plurality of relief valve apparatuses installed in each of the connection flow path between the air compressor and each of a plurality of air tanks, wherein each of the plurality of relief valve apparatuses is configured to open the connection flow path to the atmosphere when the measurement value reaches a third pressure higher than the second pressure and close the connection flow path when the measurement value reaches a fourth pressure higher than the second pressure and lower than the third pressure after the opening.Type: GrantFiled: November 25, 2013Date of Patent: November 22, 2016Assignees: MITSUBISHI HEAVY INDUSTRIES, LTD., MITSUBISHI ELECTRIC CORPORATION, CENTRAL JAPAN RAILWAY COMPANYInventors: Takahisa Inui, Tomoki Watanabe, Gakuji Kobayashi, Noriyuki Taniyama, Shinichiro Tanaka
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Patent number: 9457776Abstract: In brake control based on commands of a plurality of systems, an adjustment valve adjusts fluid supplied from a fluid source to a predetermined pressure to output the pressure-adjusted fluid. An output valve switches opening and closing based on a switching command. A skid detector detects whether a car is skidding or not and notifies a brake controller. The brake controller determines a pressure of fluid output by a control valve and issues a command to solenoid valves provided in the control valve. The brake controller issues a command to a discharge valve to discharge fluid from the discharge valve when a skid is detected. A relay valve adjusts pressure of fluid from the fluid source based on a higher pressure between a pressure of fluid output by the output valve and a pressure of fluid output by the control valve, to output the pressure-adjusted air to a brake cylinder.Type: GrantFiled: April 24, 2014Date of Patent: October 4, 2016Assignees: MITSUBISHI ELECTRIC CORPORATION, CENTRAL JAPAN RAILWAY COMPANY, MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Tomoki Watanabe, Yoshiya Watanabe, Takahisa Inui
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Publication number: 20160285395Abstract: A controlling apparatus includes a storage unit for storing, for each sampling period, a combination of a primary frequency of connected induction motors and the amplitude of a voltage command value, and a gradient detection unit for calculating a value corresponding to an increase in the amplitude of the voltage command value divided by an increase in the primary frequency, and for outputting a failure signal upon determining, when a result of the division is less than a predetermined reference value, that the plurality of induction motors include at least one induction motor having a phase sequence that includes incorrect wiring with respect to the power converter.Type: ApplicationFiled: June 8, 2016Publication date: September 29, 2016Applicants: CENTRAL JAPAN RAILWAY COMPANY, FUJI ELECTRIC CO., LTD.Inventors: Kei SAKANOUE, Hirokazu KATO, Hiroki SHIMOYAMA, Tomotaka NISHIJIMA, Junichi ISHII, Yasushi MATSUMOTO, Toshie KIKUCHI
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Patent number: D793282Type: GrantFiled: April 21, 2016Date of Patent: August 1, 2017Assignees: NIPPON STEEL & SUMITOMO METAL CORPORATION, CENTRAL JAPAN RAILWAY COMPANYInventors: Takahiro Fujimoto, Takanori Kato, Yuiko Sakayama, Atsushi Sakaguchi, Kazutaka Asabe, Naruo Miyabe, Tomohiro Otsuka, Seiji Kanamori, Jun Asano