Minutes of the proceedings of the institution of civil engineers. Electric traction is suitable for suburban and urban railway where frequent starting and stopping. A comprehensive history of the development of electric rail traction from the middle of the 19th century. We use the classic f1 emd locomotive at royal gorge route railroad as an. The locomotives tackle everything from milelong ore trains in the australian outback to overcrowded passenger trains in india. Thousands of ge machines are in operation every day throughout the world.
Pdf integrated traction and auxiliary power supply converters for. 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. System such a diesel electric drive, electric drive etc. This 270,000pound 122,470kg locomotive is designed to tow passengertrain cars at speeds of. Promising pace of development of rail infrastructure in a number of countries across the globe and increase in the demand for faster commuting networks have helped the market gain momentum over the. 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. Traction motor article about traction motor by the free.
In a paper read before the institution of civil engineers on february 21, h. Abbs proven traction generator technology comes from. 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. The fluctuating nature of the traction load causes perceptible fluctuation on the 240 v supply affecting operation of signalling equipment. 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. Traction systems all traction systems may be classified into two categories. Analysis, evaluation and simulation of railway dieselelectric and. The compact, high performance generators cover powers from 1 to over 3 mw with efficiencies up to 96. 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.
A traction motor is used to make rotation torque on a machine. Hence, it is possible to achieve higher acceleration of 1. The map used to trace out circuits and locate trouble on dieselelectric locomotives is called a schematic diagram. Some of the technical discussion is based on work that has been reported in a conference publication1. 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. 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. 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. 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.
Mar 19, 2015 traction means drawing or pulling something over a surface. Despite many diesel engines advantages, their primary disadvantage is emission of pollutants. The track electrification refers to the type of source supply system that is used while powering the electric locomotive systems. 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. Traction means drawing or pulling something over a surface. 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. Modern locomotives have electric motors connected to the drive axles. With dynamic braking, the locomotives wheels are used to drive the traction motors. 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. Configuration and performance of electrical vehicles, traction motor characteristics, tractive effort, transmission requirement, vehicle.
Richards, electrical engineer to the london and north eastern railway, makes. Which of the following is an advantage of electric traction over other methods of traction. But in order for it to use this thrust effectively, the eight wheels on the locomotive have to be able to apply this thrust. See our videos below on each part of the diesel locomotive. Ppt electric traction system powerpoint presentation free. Product note rail traction synchronous generators for diesel.
Steves railroad pages, information on dieselelectric. They are also used in electric vehicles, such as electric milk. The electric traction system is the most efficient of all other traction system such as steam and internal combustion ic engine type systems. 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. A dieselelectric transmission, or dieselelectric powertrain is a transmission system for vehicles powered by diesel engines in road, rail, and marine transport. Traction when going around turns is not an issue because train wheels have flanges that keep them on the track. Energy storage and electric generation in diesel electric locomotives conference paper pdf available july 2009 with 2,040 reads how we measure reads. Electric locomotives with onboard fueled prime movers, such as diesel. The system which use electrical power for traction system i. Feb 11, 2017 how diesel electric locomotives work 3d animation. It offers several benefits over other systems, including quick start and stop, very efficient, pollution free, easy to handle and easy speed control.
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. Steam locomotive tractive effort vs diesel electric horsepower posted by isambard on thursday, june 3, 2004 12. Rail traction synchronous generators for dieselelectric locomotives abbs unique, vibration resistant traction generators boost the reliability of modern low emission engines. Diesel electric ship propulsion is a frequent shipowners choice nowadays, especially on passengerships. 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. Jun 18, 20 moreover, the maintenance time is also much less. Pdf modernization of dieselelectric locomotive 2m62 and. Which is better electric traction or diesel traction. In a first, railways convert diesel locomotive into electric. Modernization of dieselelectric locomotive 2m62 and tep70.
Dieselelectric locomotives the free information society. Traction motors are used in electrically powered rail vehicles such as electric multiple units and electric locomotives. Magnetraction is not effective on aluminum, brass or other nonmagnetic rails. Dieselelectric ship propulsion is a frequent shipowners choice nowadays, especially on passengerships. 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. Traction how diesel locomotives work howstuffworks. Steam locomotive tractive effort vs diesel electric horsepower.
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. 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. I have some idea how the newer systems work, but lets discuss the o. 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. An electric locomotive can be started at a moments notice whereas asteam locomotive requires two hours to heat up. This locomotive can generate 64,000 pounds of thrust. 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. Economics of electric vs diesel traction railelectrica. General electric leads the way in locomotive manufacturing. Electric traction systems are various electrical systems that are used to drive railways. Modernization of dieselelectric locomotive 2m62 and tep. Haut f j g the history of the electric locomotive, george allen and unwin, 1967, pp147 plus 258 illustrations of electric traction.
Optimising power management strategies for railway traction. 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. The locomotive also includes two traction tires, which will improve traction on both magnetic and 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 engine. Traction motor simple english wikipedia, the free encyclopedia. When i worked in a locomotive factory 40 years ago, the machinery was a little simpler. From concept to execution of the conversion of the diesel locomotive to electric was carried out in just 69 days, railway. 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. At each traction substation, normally two single phase transformers are installed, one which is in service and the other is 100% stand by. The upgraded dieselelectric locomotive tep70 is of weight 126 t and has six driving axles, with axis formula a c0ac0a.
Electrification of railroads the conversion of existing railroads to operation by electric traction and the construction of new electric railroads. Its products are used by numerous railroads to haul freight and passengers. Steam, electric and dieselelectric traction nature. Reference herein to any specific commercial product, process, or service. 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 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. 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. In a diesel electric locomotive, the electrical generator and motors are the transmission. A free powerpoint ppt presentation displayed as a flash slide show on id. 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. Abbs traction generators for dieselelectric locomotives. The trend of electrical and diesel energy cost in terms of unit charges and rslitre as compiled in the annual statistical statement of. Diesel electric traction has the following advantages. By the end of the 1960s, diesel had almost completely superseded steam as the standard railroad motive power on nonelectrified lines around the world.
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. 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 %. Modernization of dieselelectric locomotive 2m62 and tep70 locomotives with respect to electrical subsystem article pdf available in procedia engineering 187. Pdf modernization of dieselelectric locomotive 2m62 and tep. Pdf development of integrated traction and auxiliary power supply converters.
The map used to trace out circuits and locate trouble on diesel electric locomotives is called a schematic diagram. 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. The work on the project began on december 22, 2017 and the new locomotive was dispatched on february 28, 2018. Abb is the expert for traction converters, motors, transformers. Dieselelectric traction has the following advantages. 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. For conversion from steam engine to diesel traction, no modification of existing track is required. Ppt electric traction system powerpoint presentation. 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. Traction systems for locomotives and high speed applications.
System of electric traction mechanics of train movement. Archived from the original pdf on november 25, 2005. The permissible range of voltages allowed for the standardised voltages is as stated in standards bs en 50163 and iec 60850. The global traction transformer market size was valued at usd 594. The upgraded dieselelectric locomotive tep70 is equipped with computer microprocessor control system for automated control of the diesel engine generator and power assembly. Traction motors in diesel locomotives ee publishers. Product note rail traction synchronous generators for. Electric vehicle and electric motor traction motor refers to a type of electric motor.
Electric traction alternating current electric power. Ac traction, diesel electric equipment, trains lighting system, specific energy, factors affecting specific energy consumption. But traction when braking and accelerating is an issue. There are many advantages of electric traction over other forms of locomotion. The hybrid diesel locomotive is an incredible display of power and ingenuity. There may be two types of traction classifications on the basis of power supply. Pdf a diagnostic of dieselelectric propulsion for ships. As the rail freight transportation is growing, abb expands its new compact, high performance generators to cover powers from 1 to over 3 mw.