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JNR Class ED15
The was an electric locomotive formerly operated in Japan from 1926 until 1960. The Class ED15 was the first mainline electric locomotive type to be built domestically in Japan. History Three locomotives were built by Hitachi in Mito, Ibaraki, in 1926, based on electric locomotives previously imported from overseas. Initially designated Class 1070 under the original Japanese Government Railways (JGR) numbering scheme, the locomotives became Class ED15 from 1928. The locomotives were initially used on Tokaido Main Line freight services, and were later employed on the Chuo Main Line. The locomotives were withdrawn from service between 1959 and 1960. File:JNR-ED151.jpg, ED15 1 drawing File:JGR-ED152.jpg, ED15 2 drawing File:JNR-ED153.jpg, ED15 3 drawing Preservation ED15 1 is preserved at the Hitachi Mito Factory in Hitachinaka, Ibaraki 250px, Hitachinaka city hall is a city located in Ibaraki Prefecture, Japan. , the city had an estimated population of 154,663 in 6 ... [...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] |
Volt
The volt (symbol: V) is the unit of electric potential, electric potential difference (voltage), and electromotive force in the International System of Units (SI). It is named after the Italian physicist Alessandro Volta (1745–1827). Definition One volt is defined as the electric potential between two points of a conducting wire when an electric current of one ampere dissipates one watt of power between those points. Equivalently, it is the potential difference between two points that will impart one joule of energy per coulomb of charge that passes through it. It can be expressed in terms of SI base units ( m, kg, second, s, and ampere, A) as : \text = \frac = \frac = \frac. It can also be expressed as amperes times ohms (current times resistance, Ohm's law), webers per second (magnetic flux per time), watts per ampere (power per current), or joules per coulomb (energy per charge), which is also equivalent to electronvolts per elementary charge: : \text = \tex ... [...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] |
Overhead Line
An overhead line or overhead wire is an electrical cable that is used to transmit electrical energy to electric locomotives, trolleybuses or trams. It is known variously as: * Overhead catenary * Overhead contact system (OCS) * Overhead equipment (OHE) * Overhead line equipment (OLE or OHLE) * Overhead lines (OHL) * Overhead wiring (OHW) * Traction wire * Trolley wire This article follows the International Union of Railways in using the generic term ''overhead line''. An overhead line consists of one or more wires (or rails, particularly in tunnels) situated over rail tracks, raised to a high electrical potential by connection to feeder stations at regular intervals. The feeder stations are usually fed from a high-voltage electrical grid. Overview Electric trains that collect their current from overhead lines use a device such as a pantograph, bow collector or trolley pole. It presses against the underside of the lowest overhead wire, the contact wire. Current collectors ar ... [...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] |
Electric Locomotive
An electric locomotive is a locomotive powered by electricity from overhead lines, a third rail or on-board energy storage such as a battery or a supercapacitor. Locomotives with on-board fuelled prime movers, such as diesel engines or gas turbines, are classed as diesel-electric or gas turbine-electric and not as electric locomotives, because the electric generator/motor combination serves only as a power transmission system. Electric locomotives benefit from the high efficiency of electric motors, often above 90% (not including the inefficiency of generating the electricity). Additional efficiency can be gained from regenerative braking, which allows kinetic energy to be recovered during braking to put power back on the line. Newer electric locomotives use AC motor-inverter drive systems that provide for regenerative braking. Electric locomotives are quiet compared to diesel locomotives since there is no engine and exhaust noise and less mechanical noise. The lack of re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mito, Ibaraki
is the capital city of Ibaraki Prefecture, in the northern Kantō region of Japan. , the city had an estimated population of 269,330 in 123,282 households and a population density of 1239 persons per km2. The percentage of the population aged over 65 was 27.1%. The total area of the city is . Geography Mito is located in central Ibaraki Prefecture. Mito Station is about 10 km inland from the Pacific Ocean which Naka River, flowing from the north to the east of the city, pours into. Immediately south is Lake Senba, a recreational area. A main street extends from Mito Station to the west, and residential areas to the south and the west in particular. Surrounding municipalities Ibaraki Prefecture * Hitachinaka * Kasama * Naka * Ibaraki * Ōarai * Shirosato Climate Mito has a Humid subtropical climate (Köppen ''Cfa'') characterized by warm summers and cold winters with light snowfall. The average annual temperature in Mito is 13.6 °C. The average annual rainfall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japanese Government Railways
The Japanese Government Railways (JGR) was the national railway system directly operated by the Japanese Ministry of Railways ( ja, 鉄道省, Tetsudō-shō, ) until 1949. It was a predecessor of Japanese National Railways and the later Japan Railways Group. Name The English name "Japanese Government Railways" was what the Ministry of Railways (established in 1920) used to call its own and sometimes the ministry itself as a railway operator. Other English names for the government railways include Imperial Japanese Government Railways and Imperial Government Railways, which were mainly used prior to the establishment of the ministry. This article covers the railways operated by the central government of Japan from 1872 to 1949 notwithstanding the official English name of the system of each era. Network By the end of World War II in 1945, the Japanese Government Railways operated on the main Japanese islands of Honshū, Hokkaidō, Kyūshū, Shikoku and Karafuto. The railways ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hitachinaka, Ibaraki
250px, Hitachinaka city hall is a city located in Ibaraki Prefecture, Japan. , the city had an estimated population of 154,663 in 64,900 households and a population density of 1547 persons per km2. The percentage of the population aged over 65 was 26.1%. The total area of the city is . It is a " hiragana city", the place name is written with the ''hiragana'' syllabary, and not the traditional ''kanji''. Geography Hitachinaka is located slightly northeast of central Ibaraki Prefecture and east of the capital of Mito. It consists of a lowland area around the Naka River in the south and the Pacific coast in the east. Surrounding municipalities Ibaraki Prefecture *Tōkai * Naka * Mito * Ōarai Climate Hitachinaka has a Humid continental climate (Köppen ''Cfa'') characterized by warm summers and cold winters with light snowfall. The average annual temperature in Hitachinaka is 13.8 °C. The average annual rainfall is 1415 mm with September as the wettest month. The te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mechanical Engineering Heritage (Japan)
The is a list of sites, landmarks, machines, and documents that made significant contributions to the development of mechanical engineering in Japan. Items in the list are certified by the . Overview The ''Mechanical Engineering Heritage'' program was inaugurated in June 2007 in connection with the 110th anniversary of the founding of the JSME. The program recognizes machines, related systems, factories, specification documents, textbooks, and other items that had a significant impact on the development of mechanical engineering. When a certified item can no longer be maintained by its current owner, the JSME acts to prevent its loss by arranging a transfer to the National Science Museum of Japan or to a local government institution. The JSME plans to certify several items of high heritage value over years. Categories Items in the Mechanical Engineering Heritage (Japan) are classified into four categories: # Sites: Historical sites that contain heritage items. # Landmarks: ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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