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E257 Series
The is a DC electric multiple unit (EMU) train type operated in Japan for limited express services by East Japan Railway Company (JR East) and built jointly by Hitachi, Kinki Sharyo, and Tokyu Car Corporation. Variants * E257-0 series: ''Azusa'', '' Kaiji'' * E257-500 series: '' Sazanami'', ''Wakashio'', ''Shiosai'', '' Ayame'' * E257-2000/-2500 series: ''Odoriko'', ''Shōnan'' *E257-5000/-5500 series: additional services Four variants exist: the original E257-0 series for use on Chūō Main Line ''Azusa'' and '' Kaiji'' limited-express services until 16 March 2019 (displaced by E353 series EMUs), the E257-500 series for use on Chiba area limited express services ( Uchibo Line '' Sazanami'', Sotobo Line ''Wakashio'', Sōbu Main Line ''Shiosai'', and Narita and Kashima Lines '' Ayame''), the E257-2000/-2500 used for ''Odoriko'' services modified from former E257-0 and -500 series trains, and the E257-5000/5500 from former E257-0 and -500 trains for use on additional and cha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hitachi
() is a Japanese multinational corporation, multinational Conglomerate (company), conglomerate corporation headquartered in Chiyoda, Tokyo, Japan. It is the parent company of the Hitachi Group (''Hitachi Gurūpu'') and had formed part of the Nissan Group, Nissan ''zaibatsu'' and later DKB Group and Fuyo Group of companies before DKB and Fuji Bank (the core Fuyo Group company) merged into the Mizuho Financial Group. As of 2020, Hitachi conducts business ranging from Information technology, IT, including Artificial intelligence, AI, the Internet of things, Internet of Things, and big data, to infrastructure. Hitachi is listed on the Tokyo Stock Exchange and Nagoya Stock Exchange and its Tokyo listing is a constituent of the Nikkei 225 and TOPIX Core30 indices. It is ranked 38th in the 2012 Fortune Global 500 and 129th in the 2012 Forbes Global 2000. History Hitachi was founded in 1910 by electrical engineer Namihei Odaira (1874–1951) in Ibaraki Prefecture. The company's firs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IGBT
An insulated-gate bipolar transistor (IGBT) is a three-terminal power semiconductor device primarily used as an electronic switch, which, as it was developed, came to combine high efficiency and fast switching. It consists of four alternating layers (P–N–P–N) that are controlled by a metal–oxide–semiconductor (MOS) gate structure. Although the structure of the IGBT is topologically the same as a thyristor with a "MOS" gate ( MOS-gate thyristor), the thyristor action is completely suppressed, and only the transistor action is permitted in the entire device operation range. It is used in switching power supplies in high-power applications: variable-frequency drives (VFDs), electric cars, trains, variable-speed refrigerators, lamp ballasts, arc-welding machines, induction hobs, and air conditioners. Since it is designed to turn on and off rapidly, the IGBT can synthesize complex waveforms with pulse-width modulation and low-pass filters, so it is also used in switching a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kaiji (train)
The is a limited express train service in Japan operated by East Japan Railway Company (JR East). It runs mainly between Shinjuku Station in Tokyo and Kōfu Station in Kōfu, Yamanashi via the Chūō Main Line. ''Chiba Kaiji'', between Chiba and Ryūō, ''Hamakaiji'', between Yokohama and Matsumoto, ''Yama Kaiji'', Between Tachikawa and Kobuchizawa, also exist as seasonal variants. Route ''Kaiji'' - (Some trains operate between and .) ''Chiba Kaiji'' - - ''Hamakaiji'' - - Yama Kaiji Tachikawa - Kobuchizawa Rolling stock From 2018, new E353 series EMUs were introduced on ''Kaiji'' services, replacing the E257 series trains. The new trains feature power outlets for passenger use and WiFi internet service. ''Kaiji'' *E353 series EMUs (since 1 July 2018) ; Former *E257 series EMUs (from 2001 to 15 March 2019) * 183/189 series EMUs (regular services until 2002 and seasonal extra services until 2018) ''Chiba Kaiji'' *E257-500 series ''Hamakaiji'' * 185 series ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Azusa (train)
The ''Azusa'' ( ja, あずさ) is a limited express service operated by the East Japan Railway Company (JR East), which mainly run between and via the Chūō Main Line and Shinonoi Line. The name ''Azusa'' is taken from the Azusa River in Matsumoto, Nagano. On the Chūō Main Line, limited express ''Kaiji (train), Kaiji'' also runs between / , and / . The ''Super Azusa'' ( ja, スーパーあずさ, links=no) was a former name given to services operated with superior tilt-body rolling stock, namely the E351 series, and the E353 series (prior to 16 March 2019). Service pattern and stops As of 16 March 2019, 18 round trips are operated every day. All trains run on the Chūō Main Line and Shinonoi Line, with few of them also running on the Sōbu Main Line and Ōito Line. Stops * No brackets denote stations that most or all ''Azusa'' services stop. * Round brackets () denote stations that some ''Azusa'' services stop. * Square brackets【】denote stations / sections th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japan Transport Engineering Company
is a manufacturer of heavy rail cars in Japan, formerly known as . The company is based in Kanazawa-ku, Yokohama, and a member of East Japan Railway Company (JR East) group. J-TREC manufactures rail vehicles not only for JR East and Tokyu Corporation but for other Japanese operators, including various Japan Railways Group companies and international operators as well. Tokyu Car Corporation, the predecessor of J-TREC, was founded on 23 August 1948. Tokyu Car was a licensee of early-generation (early-1960s) stainless-steel commuter EMU train body and related bogie technology from the Budd Company of the United States. Since then, Tokyu Car has specialised in stainless-steel body car technology. On 27 October 2011, Tokyu Car Corporation announced that its rolling stock manufacturing division would be acquired by East Japan Railway Company (JR East), and the company cease operations with effect from 1 April 2012. It is to be subsequently split into two companies, Tokyu Car Engine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
East Japan Railway Company
The is a major passenger railway company in Japan and is the largest of the seven Japan Railways Group companies. The company name is officially abbreviated as JR-EAST or JR East in English, and as in Japanese. The company's headquarters are in Yoyogi, Shibuya, Tokyo, and next to the Shinjuku Station. It is listed in the Tokyo Stock Exchange (it formerly had secondary listings in the Nagoya Stock Exchange, Nagoya and Osaka Exchange, Osaka stock exchanges), is a constituent of the TOPIX Large70 index, and is also one of the three only Japan Railways Group constituents of the Nikkei 225 index, the other being Central Japan Railway Company, JR Central and West Japan Railway Company, JR West. History JR East was incorporated on 1 April 1987 after being spun off from the government-run Japanese National Railways (JNR). The spin-off was nominally "privatization", as the company was actually a wholly owned subsidiary of the government-owned Japanese National Railway Settlement ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Multiple Unit
An electric multiple unit or EMU is a multiple-unit train consisting of self-propelled carriages using electricity as the motive power. An EMU requires no separate locomotive, as electric traction motors are incorporated within one or a number of the carriages. An EMU is usually formed of two or more semi-permanently coupled carriages, but electrically powered single-unit railcars are also generally classed as EMUs. The great majority of EMUs are passenger trains, but versions also exist for carrying mail. EMUs are popular on commuter and suburban rail networks around the world due to their fast acceleration and pollution-free operation. Being quieter than diesel multiple units (DMUs) and locomotive-hauled trains, EMUs can operate later at night and more frequently without disturbing nearby residents. In addition, tunnel design for EMU trains is simpler as no provision is needed for exhausting fumes, although retrofitting existing limited-clearance tunnels to accommodate the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Direct Current
Direct current (DC) is one-directional flow of electric charge. An electrochemical cell is a prime example of DC power. Direct current may flow through a conductor such as a wire, but can also flow through semiconductors, insulators, or even through a vacuum as in electron or ion beams. The electric current flows in a constant direction, distinguishing it from alternating current (AC). A term formerly used for this type of current was galvanic current. The abbreviations ''AC'' and ''DC'' are often used to mean simply ''alternating'' and ''direct'', as when they modify ''current'' or ''voltage''. Direct current may be converted from an alternating current supply by use of a rectifier, which contains electronic elements (usually) or electromechanical elements (historically) that allow current to flow only in one direction. Direct current may be converted into alternating current via an inverter. Direct current has many uses, from the charging of batteries to large power sup ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Automatic Train Stop
Automatic train stop or ATS is a system on a train that automatically stops a train if certain situations occur (unresponsive train operator, earthquake, disconnected rail, train running over a stop signal, etc.) to prevent accidents. In some scenarios it functions as a type of dead man's switch. Automatic train stop differs from the concept of Automatic Train Control in that ATS usually does not feature an onboard speed control mechanism. Overview Mechanical systems The invention of the fail-safe railway air brake provided an external means for stopping a train via a physical object opening a valve on the brake line to the atmosphere. Eventually known as ''train stops'' or ''trip stops'', the first mechanical ATS system was installed in France in 1878 with some railroads in Russia following suit using a similar system in 1880. In 1901 Union Switch and Signal Company developed the first North American automatic train stop system for the Boston Elevated Railway. This system was so ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electronically Controlled Pneumatic Brakes
Electronically controlled pneumatic brakes are a type of modern railway braking system which offer improved performance compared to traditional railway air brakes. Overview Traditional train braking systems use pneumatic valves to control and generate brake applications on the cars along the length of the train. In general, this conventional system consists of a brake pipe that runs the length of the train which supplies air to reservoirs mounted on each of the cars. When the brake pipe and car components are charged with air, the brakes release. When the engineer needs to make a brake application, control valves in the locomotive reduce the brake pipe pressure. As the brake pipe pressure reduces, the service portion on each car diverts air from their reservoirs to their brake cylinders. To release the brakes, the engineer charges the brake pipe. This method of controlling the brakes on freight and passenger cars has remained virtually unchanged since its invention by George Wes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Regenerative Brake
Regenerative braking is an energy recovery mechanism that slows down a moving vehicle or object by converting its kinetic energy into a form that can be either used immediately or stored until needed. In this mechanism, the electric traction motor uses the vehicle's momentum to recover energy that would otherwise be lost to the brake discs as heat. This method contrasts with conventional braking systems. In those systems, the excess kinetic energy is converted to unwanted and wasted heat due to friction in the brakes, or with rheostatic brakes, where the energy is recovered by using electric motors as generators but is immediately dissipated as heat in resistors. In addition to improving the overall efficiency of the vehicle, regeneration can significantly extend the life of the braking system as the mechanical parts will not wear out quickly. General principle The most common form of regenerative brake involves an electric motor functioning as an electric generator. In elect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pantograph (transport)
A pantograph (or "pan" or "panto") is an apparatus mounted on the roof of an electric train, tram or electric bus to collect power through contact with an overhead line. By contrast, battery electric buses and trains are charged at charging stations. The pantograph is a common type of current collector; typically, a single or double wire is used, with the return current running through the rails. The term stems from the resemblance of some styles to the mechanical pantographs used for copying handwriting and drawings. Invention The pantograph, with a low-friction, replaceable graphite contact strip or "shoe" to minimise lateral stress on the contact wire, first appeared in the late 19th century. Early versions include the bow collector, invented in 1889 by Walter Reichel, chief engineer at Siemens & Halske in Germany, and a flat slide-pantograph first used in 1895 by the Baltimore and Ohio Railroad The familiar diamond-shaped roller pantograph was devised and patented b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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