Which of the following is an advantage of electric traction over other methods of traction. The locomotives tackle everything from milelong ore trains in the australian outback to overcrowded passenger trains in india. Traction motor an electric motor used to drive vehicles such as electric locomotives and trains, dieselelectric locomotives and ships, and streetcars, trolleys, and other electric vehicles. The motors used in electric traction have a very high starting torque. Traction how diesel locomotives work howstuffworks. Analysis, evaluation and simulation of railway dieselelectric and. By the end of the 1960s, diesel had almost completely superseded steam as the standard railroad motive power on nonelectrified lines around the world. The change came first and most quickly in north america, where, during the 25 years 193560 and especially in the period 195160, railroads in the united states completely replaced their steam.
Modernization of dieselelectric locomotive 2m62 and tep70 locomotives with respect to electrical subsystem article pdf available in procedia engineering 187. The fluctuating nature of the traction load causes perceptible fluctuation on the 240 v supply affecting operation of signalling equipment. In a diesel electric locomotive, the electrical generator and motors are the transmission. Traction systems for locomotives and high speed applications. Traction when going around turns is not an issue because train wheels have flanges that keep them on the track. The upgraded dieselelectric locomotive tep70 is of weight 126 t and has six driving axles, with axis formula a c0ac0a. Ac traction, diesel electric equipment, trains lighting system, specific energy, factors affecting specific energy consumption. Magnetraction is not effective on aluminum, brass or other nonmagnetic rails. The use of a diesel engine frees the locomotive from being coupled to an external electricity supply, and the use of electric motors and drives allows control over the traction capabilities of the locomotive which would not be possible with a direct drive from the diesel.
Despite many diesel engines advantages, their primary disadvantage is emission of pollutants. This 270,000pound 122,470kg locomotive is designed to tow passengertrain cars at speeds of. The permissible range of voltages allowed for the standardised voltages is as stated in standards bs en 50163 and iec 60850. A free powerpoint ppt presentation displayed as a flash slide show on id. Traction transformer market analysis report by mounting position, by voltage network ac systems, dc systems, by rolling stock electric locomotives, highspeed trains, and segment forecasts, 2019 2025. Traction motor article about traction motor by the free. The hybrid diesel locomotive is an incredible display of power and ingenuity. Rail traction synchronous generators for dieselelectric locomotives abbs unique, vibration resistant traction generators boost the reliability of modern low emission engines.
The work on the project began on december 22, 2017 and the new locomotive was dispatched on february 28, 2018. Modernization of dieselelectric locomotive 2m62 and tep. Ppt electric traction system powerpoint presentation. As the rail freight transportation is growing, abb expands its new compact, high performance generators to cover powers from 1 to over 3 mw. Nov 30, 2015 the electric traction system is the most efficient of all other traction system such as steam and internal combustion ic engine type systems. Dieselelectric traction has the following advantages. Diesel electric traction has the following advantages. The use of a diesel engine frees the locomotive from being coupled to an external electricity supply, and the use of electric motors and drives allows control over the traction capabilities of the locomotive which would not be possible with a direct drive from the diesel engine.
Economics of electric vs diesel traction railelectrica. It combines some great mechanical technology, including a huge, 12cylinder, twostroke diesel engine, with some heavy duty electric motors and generators, throwing in a little bit of computer technology for good measure. But traction when braking and accelerating is an issue. There are advantages and disadvantages to both forms of traction, and each is suitable for certain applications. Thousands of ge machines are in operation every day throughout the world. From concept to execution of the conversion of the diesel locomotive to electric was carried out in just 69 days, railway. The trend of electrical and diesel energy cost in terms of unit charges and rslitre as compiled in the annual statistical statement of. I have some idea how the newer systems work, but lets discuss the o. Jun 27, 20 electric traction will continue to play a dominant role in the railway since it is an environmentally clean technology compared to diesel traction and also its running cost is low. See our videos below on each part of the diesel locomotive. The defining characteristic of diesel electric transmission is that it avoids the need for a gearbox, by converting the mechanical force of the diesel engine into electrical energy through a dynamo, and using the electrical energy to drive traction motors, which propel the vehicle mechanically. Ion and hall thrusters march 2008 the research described in this publication was carried out at the jet propulsion laboratory, california institute of technology, under a contract with the national aeronautics and space administration. Abb is the expert for traction converters, motors, transformers. As regards operating costs, for main line services, including interest on capital, the cost of electric traction is lower than that of steam or dieselelectric traction at traffic densities.
Electric traction is suitable for suburban and urban railway where frequent starting and stopping. Optimising power management strategies for railway traction. Electric vehicle and electric motor traction motor refers to a type of electric motor. Why do trains use diesel electric powerplants while large. By electric traction is meant locomotion in which the driving or tractive force is obtained from electric motors it is used in electric trains,tramcars,trolly buses and diesel electric vehicles etc.
The global traction transformer market size was valued at usd 594. Electrification of railroads the conversion of existing railroads to operation by electric traction and the construction of new electric railroads. Electric traction systems are various electrical systems that are used to drive railways. Pdf a diagnostic of dieselelectric propulsion for ships. Product note rail traction synchronous generators for diesel. The trend of electrical and diesel energy cost in terms of unit charges and rslitre as compiled in the annual statistical statement of indian railways is as follows. Archived from the original pdf on november 25, 2005. With dynamic braking, the locomotives wheels are used to drive the traction motors. Electric traction alternating current electric power. Pdf development of integrated traction and auxiliary power supply converters.
In an electricrailroad system, the traction motors of an electric locomotive receive their power from a contact system that is connected to a traction substation. Learn more about ac, dc, adhesion and traction in this good article here to make a diesel electric locomotive power system it takes mechanical, electrical and control engineers. At each traction substation, normally two single phase transformers are installed, one which is in service and the other is 100% stand by. There may be two types of traction classifications on the basis of power supply. Traction motor simple english wikipedia, the free encyclopedia.
Abbs proven traction generator technology comes from. It offers several benefits over other systems, including quick start and stop, very efficient, pollution free, easy to handle and easy speed control. The system which use electrical power for traction system i. Product note rail traction synchronous generators for. An electric locomotive can be started at a moments notice whereas asteam locomotive requires two hours to heat up.
Hence, it is possible to achieve higher acceleration of 1. Dieselelectric locomotives the free information society. In a first, railways convert diesel locomotive into electric. System of electric traction mechanics of train movement. In a dieselelectric locomotive, the diesel engine drives either an electrical dc generator generally, less than 3,000 horsepower 2,200 kw net for traction, or an electrical ac alternatorrectifier generally 3,000 horsepower 2,200 kw net or more for traction, the output of which provides power to the traction motors that drive the.
Feb 11, 2017 how diesel electric locomotives work 3d animation. Steam locomotive tractive effort vs diesel electric horsepower. There are many advantages of electric traction over other forms of locomotion. For conversion from steam engine to diesel traction, no modification of existing track is required.
Which is better electric traction or diesel traction. Pdf modernization of dieselelectric locomotive 2m62 and. Review of characteristics of different types of dc and ac motors used traction and their suitability moduleiv 10 hours rating and heating of electric drives, power loss, heating and cooling of motors, classes and duty and selection of motors, drives for specific application like steel, paper, textile mills. Economics of electric vs diesel traction on account of fuel cost is evaluated based on the rupees spend towards energy bill for hauling gtkm of load. Sep 23, 2014 as the rail freight transportation is growing, abb expands its new compact, high performance generators to cover powers from 1 to over 3 mw with efficiencies up to 96,9 %. We use the classic f1 emd locomotive at royal gorge route railroad as an. The electric motors receive electric power either from an onboard power source e.
Pdf modernization of dieselelectric locomotive 2m62 and tep. Steves railroad pages, information on dieselelectric. The debate over the relative merits of diesel and electric traction and which one is better is a lively one and springs up every now and then on irfca and other railway forums. The map used to trace out circuits and locate trouble on diesel electric locomotives is called a schematic diagram. A comprehensive history of the development of electric rail traction from the middle of the 19th century.
Electric locomotives with onboard fueled prime movers, such as diesel. Energy storage and electric generation in diesel electric locomotives conference paper pdf available july 2009 with 2,040 reads how we measure reads. General electric leads the way in locomotive manufacturing. Abbs traction generators for dieselelectric locomotives. System such a diesel electric drive, electric drive etc. Some of the technical discussion is based on work that has been reported in a conference publication1. Its products are used by numerous railroads to haul freight and passengers. Dieselelectric ship propulsion is a frequent shipowners choice nowadays, especially on passengerships. Traction motors may use alternating or direct current, and they may have individual or group electric drive to transmit the torque from the engine shaft to the. This locomotive can generate 64,000 pounds of thrust. Minutes of the proceedings of the institution of civil engineers, volume 234, issue 1932, 1 jan 1932 225259 singlephase electric traction including appendix and plates at back of volume.
Steam, electric and dieselelectric traction nature. Jun 18, 20 moreover, the maintenance time is also much less. Richards, electrical engineer to the london and north eastern railway, makes. Traction motors in diesel locomotives ee publishers. The map used to trace out circuits and locate trouble on dieselelectric locomotives is called a schematic diagram. Ppt electric traction system powerpoint presentation free. Haut f j g the history of the electric locomotive, george allen and unwin, 1967, pp147 plus 258 illustrations of electric traction. The electric traction system is the most efficient of all other traction system such as steam and internal combustion ic engine type systems. Configuration and performance of electrical vehicles, traction motor characteristics, tractive effort, transmission requirement, vehicle. A traction motor is an electric motor used for propulsion of a vehicle, such as locomotives, 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. With energetically free excitation, low fundamental reactance and the ability to have high pole count, permanent magnet machines can be extremely light in weight and highly efficient.
Reference herein to any specific commercial product, process, or service. The upgraded dieselelectric locomotive tep70 is equipped with computer microprocessor control system for automated control of the diesel engine generator and power assembly. In a paper read before the institution of civil engineers on february 21, h. Massachusetts institute of technology 1 introduction this is a concept paper in response to the foa entitled rare earth alternatives in critical technologies for energy react. They are also used in electric vehicles, such as electric milk.
Modernization of dieselelectric locomotive 2m62 and tep70. A dieselelectric transmission, or dieselelectric powertrain is a transmission system for vehicles powered by diesel engines in road, rail, and marine transport. A traction motor is used to make rotation torque on a machine. Modern locomotives have electric motors connected to the drive axles. Steam locomotive tractive effort vs diesel electric horsepower posted by isambard on thursday, june 3, 2004 12. When i worked in a locomotive factory 40 years ago, the machinery was a little simpler. Speed time, distance time and simplified speedtime curves, attractive effort for acceleration and propulsion, effective weight, train resistance, adhesive weight, specific energy output and consumption. Diesel electric ship propulsion is a frequent shipowners choice nowadays, especially on passengerships.
The locomotive also includes two traction tires, which will improve traction on both magnetic and nonmagnetic rails. There are many other voltage systems used for railway electrification systems around the world, and the list of current systems for electric rail traction covers both standard voltage and nonstandard voltage systems. Pdf integrated traction and auxiliary power supply converters for. Traction means drawing or pulling something over a surface. As regards operating costs, for main line services, including interest on capital, the cost of electric traction is lower than that of steam or diesel electric traction at traffic densities. Traction systems all traction systems may be classified into two categories. Dieselelectric transmission is based on petrolelectric transmission, a very similar transmission system used for petrol engines the defining characteristic of dieselelectric transmission is that it avoids the need for a.
In a diesel electric locomotive, the diesel engine drives either an electrical dc generator generally, less than 3,000 horsepower 2,200 kw net for traction, or an electrical ac alternatorrectifier generally 3,000 horsepower 2,200 kw net or more for traction, the output of which provides power to the traction motors that drive the. An electric locomotive is a locomotive powered by electricity from overhead lines, a third rail or onboard energy storage such as a battery or a supercapacitor. Minutes of the proceedings of the institution of civil engineers. In a first, the indian railways has converted a diesel locomotive into an electric one, as part of its efforts to completely electrify the broad gauge network. Traction motors are used in electrically powered rail vehicles such as electric multiple units and electric locomotives.
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