Patents Assigned to Central Japan Railway Company
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Patent number: 10625758Abstract: A voltage estimating device for a power supply line according to one aspect of the present disclosure includes a voltage detector, a current detector, a voltage calculator. The voltage calculator calculates a magnitude of alternating primary voltage that a primary winding in a transformer receives from a power supply line based on a magnitude of tertiary voltage in the transformer detected by the voltage detector, a magnitude of output current in the transformer detected by the current detector, and correlation information. The correlation information indicates a correlation between a voltage ratio and the magnitude of the output current, and the voltage ratio represents a ratio of the magnitude of the primary voltage to the magnitude of the tertiary voltage.Type: GrantFiled: January 30, 2018Date of Patent: April 21, 2020Assignee: CENTRAL JAPAN RAILWAY COMPANYInventors: Kenji Sato, Takafumi Fukushima, Norihiro Suyama
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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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Publication number: 20200086897Abstract: A floating caliper brake device for a railroad vehicle 100 includes: a support frame 1 that has a cylindrical portion 1a; a support pin 2 that is supported by the cylindrical portion 1a in such a manner as to be slidable in a direction X; a caliper 3 that includes a first arm portion 3a and a second arm portion 3b; a first brake shoe 4; a second brake shoe 5 that is opposite to the first brake shoe 4; a pressurizing device 6 that moves the first brake shoe 4 back and forth; an elastic member 7 that is expandable and contractible in the direction X; a stopper member 8 that is immovable relatively to the cylindrical portion 1a in the direction X; and a moving member 9 that is frictionally engaged with the support pin 2 in such a manner as to be slidable in the direction X, wherein end portions on an L side of the elastic member 7 and the stopper member 8 are each supported by the cylindrical portion 1a, at least a portion of an end portion on an R side of the stopper member 8 overlaps the moving member 9 when vType: ApplicationFiled: May 22, 2018Publication date: March 19, 2020Applicants: NIPPON STEEL CORPORATION, CENTRAL JAPAN RAILWAY COMPANYInventors: Kousuke SAKAGUCHI, Kazuaki FUJITA, Masanori SAWADA, Hironori YOKOTA, Tomohiro OTSUKA, Jun ASANO, Masashi SEKIYA, Seiji KANAMORI
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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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Patent number: 10516345Abstract: A power conversion controller for electric train in one aspect of the present disclosure includes an active current command value generator, an overhead line voltage detector, an initial value calculator, an adjustment value calculator, an upper limit value setter, and an output limiter. The output limiter outputs a reactive current command adjustment value calculated by the adjustment value calculator as a reactive current command value when the reactive current command adjustment value is equal to or lower than an upper limit value set by the upper limit value setter, and outputs the upper limit value as the reactive current command value when the reactive current command adjustment value exceeds the upper limit value.Type: GrantFiled: March 31, 2017Date of Patent: December 24, 2019Assignee: CENTRAL JAPAN RAILWAY COMPANYInventors: Ken Kunomura, Kenji Sato, Akihiro Koyanagi
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Publication number: 20190288588Abstract: A cage induction motor includes a rotor core that is rotatable about a central axis, and a shaft to which the rotor core is fixed. The rotor core includes an annular yoke and a plurality of spokes. The yoke supports at least one conductor. The plurality of spokes are arranged apart from one another in a circumferential direction of the yoke, are provided between the yoke and the shaft, and support the yoke.Type: ApplicationFiled: May 19, 2017Publication date: September 19, 2019Applicants: CENTRAL JAPAN RAILWAY COMPANY, Toshiba Infrastructure Systems & Solutions CorporationInventors: Kenji SATO, Takafumi FUKUSHIMA, Daisuke MISU, Makoto MATSUSHITA, Toshio HASEBE
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Patent number: 10377240Abstract: A collected-current monitoring device includes a current-value obtaining unit for obtaining current values I1 and I2; a first RMS-calculation unit for calculating a root mean square (RMS) 1 of the current value I1 at a window width W; a second RMS-calculation unit for calculating a root mean square (RMS) 2 of the current value I2 at the window width W; a determining unit for determining whether a combination of the RMS 1 and the RMS 2 satisfies an abnormality condition; an abnormality-signal output unit for outputting an abnormality signal when the abnormality condition is satisfied; an information-obtaining unit for obtaining railway vehicle information; and a setting unit for setting a set-parameter that includes at least one of the window width W or the abnormality condition depending on the railway vehicle information.Type: GrantFiled: November 1, 2016Date of Patent: August 13, 2019Assignee: CENTRAL JAPAN RAILWAY COMPANYInventors: Yuichi Ahiko, Kotaro Nakamura, Hiroki Shimoyama
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Patent number: 10343526Abstract: A collected-current monitoring device includes a current-value obtaining unit for obtaining current values I1 and I2; a first RMS-calculation unit for calculating a root mean square (RMS) 1 of the current value I1 at a window width W; a second RMS-calculation unit for calculating a root mean square (RMS) 2 of the current value I2 at the window width W; a determining unit for determining whether a combination of the RMS 1 and the RMS 2 satisfies an abnormality condition; an abnormality-signal output unit for outputting an abnormality signal when the abnormality condition is satisfied; an information-obtaining unit for obtaining railway vehicle information; and a setting unit for setting a set-parameter that includes at least one of the window width W or the abnormality condition depending on the railway vehicle information.Type: GrantFiled: November 1, 2016Date of Patent: July 9, 2019Assignee: CENTRAL JAPAN RAILWAY COMPANYInventors: Yuichi Ahiko, Kotaro Nakamura, Hiroki Shimoyama
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Patent number: 10343549Abstract: A railway vehicle having a plurality of electrical circuits is presented herein. 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 contactor 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: GrantFiled: July 1, 2015Date of Patent: July 9, 2019Assignee: CENTRAL JAPAN RAILWAY COMPANYInventors: Kei Sakanoue, Masashi Furuya, Hirokazu Kato, Shigekazu Okada
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Publication number: 20190160951Abstract: A current collector monitoring system in one aspect of the present disclosure is provided with: a collected current measurement unit; a collected current state determination unit; an image acquisition unit; an event recognition unit; an event determination unit; and a determination result output unit. When a state of collected current corresponds to an abnormal state, the image acquisition unit acquires an image including, within an angle of view, a collector shoe provided to a current collector.Type: ApplicationFiled: August 2, 2016Publication date: May 30, 2019Applicant: CENTRAL JAPAN RAILWAY COMPANYInventors: Kei Sakanoue, Isao Naruse, Kotaro Nakamura, Masayuki Ueno, Noriyuki Taniyama, Shigekazu Okada
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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: 20190054933Abstract: A vehicle body inclination controller includes an air spring, an air reservoir, valve devices, an acquisition section, and a determination section. The determination section compares, with a predetermined threshold, at least one of a value of a ratio between supply control information of a supply valve and exhaust control information of an exhaust valve in the same valve device among the valve devices, a value of a ratio between pieces of the supply control information of the supply valves of different valve devices among the valve devices, or a value of a ratio between pieces of the exhaust control information of the exhaust valves of different valve devices among the valve devices, and determines that a failure occurs in the same valve device or at least one of the different valve devices when the value of the ratio exceeds the predetermined threshold.Type: ApplicationFiled: February 24, 2017Publication date: February 21, 2019Applicant: CENTRAL JAPAN RAILWAY COMPANYInventors: Toshikatsu TANASE, Tsukasa HOSOMI, Toru TATSUNO, Kota TERADA
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Patent number: 10141789Abstract: 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: GrantFiled: April 13, 2016Date of Patent: November 27, 2018Assignees: 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: 20180326954Abstract: Provided is a brake control device that enables shortening of a braking distance in an emergency stop situation, according to an adhesive state of a wheel. The present disclosure relates to a brake control device for emergency stopping of a railway vehicle. The brake control device includes at least one brake unit, a brake controller, and at least one skidding detector. The at least one brake unit generates a braking force. The brake controller is configured to control operation of the at least one brake unit. The brake controller changes a braking pattern to be output to the at least one brake unit based on skidding information of a wheel. The at least one skidding detector is configured to obtain the skidding information.Type: ApplicationFiled: April 20, 2018Publication date: November 15, 2018Applicant: CENTRAL JAPAN RAILWAY COMPANYInventors: Masayuki UENO, Gakuji KOBAYASHI
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Publication number: 20180312064Abstract: A collected-current monitoring device includes a current-value obtaining unit for obtaining current values I1 and I2; a first RMS-calculation unit for calculating a root mean square (RMS) 1 of the current value I1 at a window width W; a second RMS-calculation unit for calculating a root mean square (RMS) 2 of the current value I2 at the window width W; a determining unit for determining whether a combination of the RMS 1 and the RMS 2 satisfies an abnormality condition; an abnormality-signal output unit for outputting an abnormality signal when the abnormality condition is satisfied; an information-obtaining unit for obtaining railway vehicle information; and a setting unit for setting a set-parameter that includes at least one of the window width W or the abnormality condition depending on the railway vehicle information.Type: ApplicationFiled: November 1, 2016Publication date: November 1, 2018Applicant: CENTRAL JAPAN RAILWAY COMPANYInventors: Yuichi AHIKO, Kotaro NAKAMURA, Hiroki SHIMOYAMA
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Patent number: 10042062Abstract: An earthquake prediction device comprises a predicted value calculation unit 16 that calculates, from a prediction formula below, a predicted value (MMIap) indicating a predicted intensity of a ground motion on the Modified Mercalli Intensity scale, using a maximum acceleration value (Aumax), which is a maximum absolute value among absolute values of vertical acceleration component of the ground motion, after a sensor starts detecting the ground motion caused by an earthquake. The prediction formula is: MMIap=?a log10(Aumax)+?a.Type: GrantFiled: February 25, 2013Date of Patent: August 7, 2018Assignee: CENTRAL JAPAN RAILWAY COMPANYInventor: Shuichi Taya
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Patent number: D860049Type: GrantFiled: December 8, 2015Date of Patent: September 17, 2019Assignees: CENTRAL JAPAN RAILWAY COMPANY, NIPPON SHARYO, LTD.Inventors: Yukio Takahashi, Yuya Futamura, Koichi Hayashi, Hiroki Tanaka, Naoya Ozawa, Naoyuki Maruyama
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Patent number: D867208Type: GrantFiled: October 9, 2017Date of Patent: November 19, 2019Assignees: Hitachi, Ltd., Central Japan Railway Company, A & F CorporationInventors: Yukinobu Abe, Tohru Watanabe, Kiyoshi Morita, Takashi Furukawa, Yuuji Ueno, Yasuhide Ueda, Hajime Ito, Yuichi Ahiko, Hiroki Shimoyama, Tadashi Fujii, Hideto Sanui, Kyohei Suzuki, Tetsuo Fukuda, Ichiro Fukuda
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Patent number: D869335Type: GrantFiled: December 8, 2015Date of Patent: December 10, 2019Assignees: CENTRAL JAPAN RAILWAY COMPANY, NIPPON SHARYO, LTD.Inventors: Yukio Takahashi, Yuya Futamura, Koichi Hayashi, Hiroki Tanaka, Naoya Ozawa, Naoyuki Maruyama