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DT40 MicroDNA
The Type DT4 is a four-car electric multiple unit (EMU) train type operated by the Hamburger Hochbahn AG on the Hamburg U-Bahn system since 1988. Formation Every DT4 train consists of four cars, which are formed as two Articulated car, articulated half-sets with two cars each. The cars don't have Gangway_connection#Open_gangways_in_urban_transit, gangways, but feature windows in the inner car ends. Interior The interior consists of transverse seating bays. Widescreen passenger information displays are to be fitted to the whole DT4 fleet, with works scheduled to be completed in 2022. File:Hamburg U-Bahn innen.3.jpg, Interior view DT4.1 and DT4.2 File:HHA DT4 Innenansicht.jpg, Interior view DT4.3 and DT4.4 File:HHA DT4 Innenansicht-new.jpg, Interior with passenger information display in September 2008 File:Hamburg U-Bahnzug innen4.JPG, Interior of a refurbished train in August 2015 Technical specifications The trains have steel car bodies and a three-phase propulsion system. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Linke-Hofmann-Busch
Alstom Transport Deutschland, formerly Linke-Hofmann-Busch, is a German manufacturing company originally established in Breslau (now Wrocław, Poland) to produce locomotives and rolling stock. Its origins lay in the wheelwright business of Gottfried Linke, begun in 1834. After World War II, the company was reestablished in Salzgitter in West Germany. In 1994, Alstom, GEC Alsthom acquired a 51% shareholding.World Update ''Railway Age'', August 1994, p. 88. It is now part of Alstom; the name Linke-Hofmann-Busch ceased to be used in 2009 when it became Alstom Transport Deutschland GmbH. Aircraft industry During World War I, it became one of many companies in Germany drawn into the aircraft industry even though they had no prior experience in aircraft design process, aircraft design. Linke-Hofmann-Busch first entered the aircraft industry by repairing and constructing aircraft designed by other established companies under licence, such as the Roland C.IIa, Albatros B.IIa, Albatros ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hamburger Morgenpost
The ''Hamburger Morgenpost'' (Hamburg Morning Post) (also known as Mopo) is a daily German newspaper published in Hamburg in Tabloid (newspaper format), tabloid format. As of 2006 the ''Hamburger Morgenpost'' was the second-largest newspaper in Hamburg after ''Bild Zeitung''. History and profile The ''Hamburger Morgenpost'' was founded in 1949 by the Hamburg section of the Social Democratic Party of Germany, Social Democratic Party (SPD) with a circulation of 6,000 copies. Until the late 1950s, the circulation increased to 450,000 copies. When ''Bild Zeitung'' was brought out by the Axel Springer publishing house as a second tabloid serving Hamburg, the circulation of the ''Hamburger Morgenpost'' declined steadily. Due to the existing competition with other newspapers, such as the 1948 re-founded ''Hamburger Abendblatt'', there was a decline in interest in political party-owned newspapers in Hamburg. The SPD sold the newspaper following financial problems in the mid-1970s. After ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Multiple Units Of Germany
Electricity is the set of physical phenomena associated with the presence and motion of matter possessing an electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations. Common phenomena are related to electricity, including lightning, static electricity, electric heating, electric discharges and many others. The presence of either a positive or negative electric charge produces an electric field. The motion of electric charges is an electric current and produces a magnetic field. In most applications, Coulomb's law determines the force acting on an electric charge. Electric potential is the work done to move an electric charge from one point to another within an electric field, typically measured in volts. Electricity plays a central role in many modern technologies, serving in electric power where electric current is used to energise equipment, and in electronics dealing with electrical c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hamburg U-Bahn Type DT5
The Type DT5 is an electric multiple unit (EMU) train type operated by the Hamburger Hochbahn AG on the Hamburg U-Bahn system. It is the first type of rolling stock on the Hamburg U-Bahn that has air conditioning and gangways between the individual cars. Formation Every DT5 train consists of three permanently-coupled cars. The cars are connected with gangways, allowing passengers to walk into the adjacent cars. Up to three units can be coupled together. Interior The interior consists of red upholstered seating, and spaces for wheelchairs and prams. The trains have displays which show the names of the next four stations, and CCTV cameras. The interior is air conditioned. HHA DT5 302-3 Innenraum.jpg, Interior view at InnoTrans 2010 Technical specifications The train is built to an articulated design, with the two end cars only having one bogie, while the center car has two bogies. The car bodies are made out of stainless steel, and the trains are powered by three-phase motor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asynchronous Motor
An induction motor or asynchronous motor is an AC electric motor in which the electric current in the rotor that produces torque is obtained by electromagnetic induction from the magnetic field of the stator winding. An induction motor therefore needs no electrical connections to the rotor. An induction motor's rotor can be either wound type or squirrel-cage type. Three-phase squirrel-cage induction motors are widely used as industrial drives because they are self-starting, reliable, and economical. Single-phase induction motors are used extensively for smaller loads, such as garbage disposals and stationary power tools. Although traditionally used for constant-speed service, single- and three-phase induction motors are increasingly being installed in variable-speed applications using variable-frequency drives (VFD). VFD offers energy savings opportunities for induction motors in applications like fans, pumps, and compressors that have a variable load. History In 1824 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Cooled
Cooling tower and water discharge of a nuclear power plant Water cooling is a method of heat removal from components and industrial equipment. Evaporative cooling using water is often more efficient than air cooling. Water is inexpensive and non-toxic; however, it can contain impurities and cause corrosion. Water cooling is commonly used for cooling automobile internal combustion engines and power stations. Water coolers utilising convective heat transfer are used inside high-end personal computers to lower the temperature of CPUs and other components. Other uses include the cooling of lubricant oil in pumps; for cooling purposes in heat exchangers; for cooling buildings in HVAC and in chillers. Mechanism Advantages Water is inexpensive, non-toxic, and available over most of the earth's surface. Liquid cooling offers higher thermal conductivity than air cooling. Water has unusually high specific heat capacity among commonly available liquids at room temperature and atmospher ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jacobs Bogie
Jacobs bogies (named after Wilhelm Jakobs, 1858–1942, a German Mechanical engineering, mechanical Railway engineering, railway engineer) are a type of Rail transport, rail vehicle bogie commonly found on Articulated car, articulated railcars and Tram#Articulated, tramway vehicles. Instead of being underneath a piece of rolling stock, Jacobs bogies are placed between two carriages. The weight of each carriage is spread across the Jacobs bogie. This arrangement provides the smooth ride of bogie carriages without the additional weight and drag. Talgo#Design, Talgo trains use modified Jacobs bogies, that only use two wheels, and the wheels are allowed to spin independently of each other, eliminating hunting oscillation. Background The first fast train using this type of bogie was the German Fliegender Hamburger in 1932. In the United States, such configurations were used throughout the twentieth century with some success on early streamliner, streamlined passenger trainsets, such ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IGBT
An insulated-gate bipolar transistor (IGBT) is a three-terminal power semiconductor device primarily forming an electronic switch. It was developed to combine high efficiency with fast switching. It consists of four alternating layers (NPNP) that are controlled by a metal–oxide–semiconductor (MOS) gate structure. Although the structure of the IGBT is topologically similar to 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) for motor control in electric cars, trains, variable-speed refrigerators, and air conditioners, as well as lamp ballasts, arc-welding machines, photovoltaic and hybrid inverters, uninterruptible power supply systems (UPS), and induction stoves. Since it is designed to turn on and off rapidly, the IGBT can synthesize complex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gate Turn-off Thyristor
A gate turn-off thyristor (GTO) is a type of high-power (e.g. 1200 V AC) thyristor that unlike a normal thyristor is fully controllable and can be turned On and Off by their gate lead. It was invented by General Electric. Device description Normal thyristors ( silicon-controlled rectifiers) are not fully controllable switches (a fully controllable switch can be turned on and off at will). Thyristors can only be turned on using the gate lead, but cannot be turned off using the gate lead. Thyristors are switched on by a gate signal, but even after the gate signal is de-asserted (removed, reverse biased), the thyristor remains in the on state until a turn-off condition occurs (which can be the application of a reverse voltage to the terminals or a decrease of the forward current below a certain threshold value known as the ''holding current''). Thus, a thyristor behaves like a normal semiconductor diode after it is turned on, or ''fired''. The GTO can be turned on by a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thyristor
A thyristor (, from a combination of Greek language ''θύρα'', meaning "door" or "valve", and ''transistor'' ) is a solid-state semiconductor device which can be thought of as being a highly robust and switchable diode, allowing the passage of current in one direction but not the other, often under control of a gate electrode, that is used in high power applications like inverters and radar generators. It usually consists of four layers of alternating P- and N-type materials. It acts as a bistable switch (or a latch). There are two designs, differing in what triggers the conducting state. In a three-lead thyristor, a small current on its gate lead controls the larger current of the anode-to-cathode path. In a two-lead thyristor, conduction begins when the potential difference between the anode and cathode themselves is sufficiently large (breakdown voltage). The thyristor continues conducting until the voltage across the device is reverse-biased or the voltage is removed (b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Three-phase
Three-phase electric power (abbreviated 3ϕ) is a common type of alternating current (AC) used in electricity generation, Electric power transmission, transmission, and Electric power distribution, distribution. It is a type of polyphase system employing three wires (or four including an optional neutral return wire) and is the most common method used by electrical grids worldwide to transfer power. Three-phase electrical power was developed in the 1880s by several people. In three-phase power, the voltage on each wire is 120 degrees phase shifted relative to each of the other wires. Because it is an AC system, it allows the voltages to be easily stepped up using transformers to high voltage for transmission and back down for distribution, giving high efficiency. A three-wire three-phase circuit is usually more economical than an equivalent two-wire Single-phase electric power, single-phase circuit at the same line-to-ground voltage because it uses less conductor material to tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Widescreen
Widescreen images are displayed within a set of aspect ratio (image), aspect ratios (relationship of image width to height) used in film, television and computer screens. In film, a widescreen film is any film image with a width-to-height aspect ratio greater than 4:3 (1.33:1). For TV, the original screen ratio for broadcasts was in 4:3 (1.33:1). Largely between the 1990s and early 2000s, at varying paces in different countries, 16:9 (e.g. 1920×1080p 60p) widescreen displays came into increasingly common use by high-definition video, high definitions. With computer displays, aspect ratios other than 4:3 (e.g. 1920×1440) are also referred to as "widescreen". Widescreen computer displays were previously made in a 16:10 aspect ratio (e.g. 1920×1200), but nowadays they are 16:9 (e.g. 1920×1080, 2560×1440, 3840×2160). Film History Widescreen was first used for ''The Corbett-Fitzsimmons Fight'' (1897). This was not only the longest film that had been released to date at 10 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
