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FS Class E.432
FS Class E.432 was a class of three-phase electric locomotives of the Italian State Railways. Forty of these 1′D1′ locomotives were built in 1928 by Società Ernesto Breda and two have been preserved. History Given the success obtained with the three-phase operation, the electrification continued and with it the demand for ever better performance. The previous E.431s proved to be disappointing, so that around 1926, the Traction Service of the State Railways set up a new locomotive project. Under the direction of Giuseppe Bianchi it was also decided to disengage from dependence on foreign patents for the pantographs, the connecting rods and transmission from the motors to the wheels. The new locomotives were ordered from Ernesto Breda in two batches totalling 40 units. The E.432 from 1929 went into service on the important Porrettana and Brennero lines and later on the lines between Turin and Genoa, towards the Val di Susa, and on the Ligurian coast lines, especially that ... [...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] |
Liguria
Liguria (; lij, Ligûria ; french: Ligurie) is a Regions of Italy, region of north-western Italy; its Capital city, capital is Genoa. Its territory is crossed by the Alps and the Apennine Mountains, Apennines Mountain chain, mountain range and is roughly coextensive with the former territory of the Republic of Genoa. Liguria is bordered by France (Provence-Alpes-Côte d'Azur) to the west, Piedmont to the north, and Emilia-Romagna and Tuscany to the east. It rests on the Ligurian Sea, and has a population of 1,557,533. The region is part of the Alps–Mediterranean Euroregion. Etymology The name ''Liguria'' predates Latin and is of obscure origin. The Latin adjectives (as in ) and ''Liguscus'' reveal the original root of the name, ''ligusc-'': in the Latin name -sc- was shortened to -s-, and later turned into the -r- of , according to rhotacism (sound change), rhotacism. Compare grc, λίγυς, translit=Lígus, translation=a Ligurian, a person from Liguria whence . The name de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Induction Motor
An induction motor or asynchronous motor is an AC electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding. An induction motor can therefore be made without 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 household appliances like fans. Although traditionally used in fixed-speed service, induction motors are increasingly being used with variable-frequency drives (VFD) in variable-speed service. VFDs offer especially important energy savings opportunities for existing and prospective induction motors in variable-torque centrifugal fan, pump and compressor load applications. Squirrel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Liquid Rheostat
A liquid rheostat or water rheostat or salt water rheostat is a type of variable resistor. This may be used as a dummy load or as a starting resistor for large slip ring motors. In the simplest form it consists of a tank containing brine or other electrolyte solution, in which electrodes are submerged to create an electrical load. The electrodes may be raised or lowered into the liquid to respectively increase or decrease the electrical resistance of the load. To stabilize the load, the mixture must not be allowed to boil. Modern designs use stainless steel electrodes, and sodium carbonate, or other salts, and do not use the container as one electrode. In some designs the electrodes are fixed and the liquid is raised and lowered by an external cylinder or pump. Motor start systems used for frequent and rapid starts and re-starts, thus a high heat load to the rheostats, may include water circulation to external heat exchangers. In such cases anti-freeze and anti-corrosion additi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Traction Motor
A traction motor is an electric motor used for propulsion of a vehicle, such as locomotives, electric vehicle, electric or hydrogen vehicles, elevators or electric multiple unit. Traction motors are used in electrically powered rail vehicles (electric multiple units) and other electric vehicles including electric milk floats, elevators, roller coasters, conveyors, and trolleybuses, as well as vehicles with electrical transmission systems (Diesel locomotive#Transmission types, diesel-electric locomotives, electric hybrid vehicles), and battery electric vehicles. Motor types and control DC motor, Direct-current motors with series Field coil, field windings are the oldest type of traction motors. These provide a speed-torque characteristic useful for propulsion, providing high torque at lower speeds for acceleration of the vehicle, and declining torque as speed increases. By arranging the field winding with multiple taps, the speed characteristic can be varied, allowing relatively ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coupling Rod
A coupling rod or side rod connects the driving wheels of a locomotive. Steam locomotives in particular usually have them, but some diesel and electric locomotives, especially older ones and shunters, also have them. The coupling rods transfer the power of drive to all wheels. Development Locomotion No. 1 was the first locomotive to employ coupling rods rather than chains. In the 1930s reliable roller bearing coupling rods were developed. Allowance for vertical motion In general, all railroad vehicles have spring suspension; without springs, irregularities in the track could lift wheels off the rail and cause impact damage to both rails and vehicles. Driving wheels are typically mounted so that they have around 1 inch (2.5 cm) of vertical motion. When there are only 2 coupled axles, this range of motion places only slight stress on the crank pins. With more axles, however, provision must be made to allow each axle to move vertically independently of the others without be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Krauss-Helmholtz Bogie
A Krauss-Helmholtz bogie (''Krauss-Helmholtz-Lenkgestell'') is a mechanism used on steam locomotives and some electric locomotives to improve curve running. Operation The bogie comprises a carrying axle connected to a coupled axle via a shaft or lever. In straight running, any radial movement of the carrying axle results in a sideways movement of the coupled axle in the opposite direction. However, the carrying axle is centred by means of two heavy duty springs just behind it. In addition the pivot pin may be allowed to move sideways, but again is held centrally by heavy springs. When travelling round a curve, the carrying axle swings to one side causing the coupled axle to move sideways in the opposite direction. In this way radial forces during curve running are more or less evened out on both axles, so that riding qualities similar to those of a normal bogie are achieved and wear and tear reduced on wheel flanges and rails. The bogie is a type of pony truck and was name ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Driving Wheel
On a steam locomotive, a driving wheel is a powered wheel which is driven by the locomotive's pistons (or turbine, in the case of a steam turbine locomotive). On a conventional, non-articulated locomotive, the driving wheels are all coupled together with side rods (also known as coupling rods); normally one pair is directly driven by the main rod (or connecting rod) which is connected to the end of the piston rod; power is transmitted to the others through the side rods. On diesel and electric locomotives, the driving wheels may be directly driven by the traction motors. Coupling rods are not usually used, and it is quite common for each axle to have its own motor. Jackshaft drive and coupling rods were used in the past (e.g. in the Swiss Crocodile locomotive) but their use is now confined to shunting locomotives. On an articulated locomotive or a duplex locomotive, driving wheels are grouped into sets which are linked together within the set. Diameter Driving wheels ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
UIC Classification Of Locomotive Axle Arrangements
The UIC classification of locomotive axle arrangements, sometimes known as the German classification''The Railway Data File''. Leicester: Silverdale, 2000. p. 52. . or German system,Kalla-Bishop P.M. & Greggio, Luciano, ''Steam Locomotives'', Crescent, 1985, p. 226. describes the wheel arrangement of locomotives, multiple units and trams. It is used in much of the world, notable exceptions being the United Kingdom, which uses a slightly simplified form of UIC (except for steam locomotives and small diesel shunters, where Whyte notation is used), and in North America, where the AAR wheel arrangement system (essentially another simplification of the UIC system) is used to describe diesel and electric locomotives; Whyte notation is used in North America only for steam locomotives. The classification system is managed by the International Union of Railways (UIC). Structure The UIC uses the following structure: ; Upper-case letters : Indicate driving axles, starting at A for a singl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acqui Terme
Acqui Terme (; pms, Àich ) is a city and ''comune'' in the province of Alessandria, Piedmont, northern Italy. It is about south-southwest of Alessandria. It is one of the principal winemaking communes of the Italian DOCG wine Brachetto d'Acqui. The city's hot sulphur springs have been famous since this was the Roman town of ''Aquae Statiellae''; the ancient baths are referred to by Paulus Diaconus and the chronicler Liutprand of Cremona. In 1870 Giovanni Ceruti designed a small pavilion, known as ''La Bollente'', for the spot at the centre of the town where the waters bubble up at . History During the Roman period, the region was connected by road with Alba Pompeia and Augusta Taurinorum (Turin) and was populated by the local Celto- Ligurian tribe of the Statielli. The region was subject to Roman rule after their main center, Carystum (Acqui Terme), was attacked in 173 BC by the legions led by the consul Marcus Popilius Laenas. The Statielli did not oppose the resistance, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alessandria
Alessandria (; pms, Lissandria ) is a city and ''comune'' in Piedmont, Italy, and the capital of the Province of Alessandria. The city is sited on the alluvial plain between the Tanaro and the Bormida rivers, about east of Turin. Alessandria is also a major railway hub. History Alessandria was founded in 1168 with a charter as a free comune; it was sited upon a preexisting urban nucleus, to serve as a stronghold for the Lombard League, defending the traditional liberties of the communes of northern Italy against the Imperial forces of Frederick Barbarossa. Alessandria stood in the territories of the marchese of Montferrat, a staunch ally of the Emperor, with a name assumed in 1168 to honour the Emperor's opponent, Pope Alexander III. In 1174–1175 the fortress was sorely tested by the Imperial siege and stood fast. A legend (related in Umberto Eco's book ''Baudolino'', and which recalls one concerning Bishop Herculanus’ successful defence of Perugia several centuries ear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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