This model includes the basic technologies used today. Brushless dc motor design for electric traction system. Electric traction 1701 however, the steam locomotive suffers from the following disadvantages. Thirdrail systems are predominantly in the 600750 volt range. Act of drawing or being drawn is known as traction. The equipments should be capable of withstanding large temporary loads. Dcdc dieselelectric locomotive 2m62 automatic control system acs. 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. Modernization of dieselelectric locomotive 2m62 and tep70. A free powerpoint ppt presentation displayed as a flash slide show on id. Which of the following is an advantage of electric traction over other methods of traction. Types of traction systems electrictraction systems can be broadly divided into those using alternating current and those using direct current. System of electric traction mechanics of train movement. Electric motors are made up of three main parts, a rotor output shaft which is permanently attached to a stator, so they move as one piece.
The permissible range of voltages allowed for the standardised voltages is as stated in standards bs en 50163 and iec 60850. North american locomotives, such as those built by emd or general electric, have nine. 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. Sinister diesel reserves right to modify, change or cancel any offer before, during andor after any sale or transaction. Ppt electric traction system powerpoint presentation. Electric traction mcqs answers pdf electrical engineering multiple choice questions answers. Federal transit administration december 9, 2016 8 new insulators that can be removed for cleaning and then reinstalled. The trend of electrical and diesel energy cost in terms of unit charges and rslitre as compiled in the annual statistical statement of. The dieselelectric locomotive in the us are descendents of the gas electric cars and the dan patch line gas electric locomotives with a lot of electric locomotive experience thrown in. Prospects for the use of supercapacitors in railroad electric transport. Gtu electrical power utilization and traction semester exam previous year question paper download pdf presentation on economies of traction diesel vs electric ebook download ppt diesel vs electric traction ppt. The upfront costs of building such a railroad, however, are no doubt higher, which is why some commuter railroads arriving on scene recently no doubt are dieselized. Diesel versus electric traction economics railuk forums.
Abbs proven traction generator technology comes from. Steam locomotive tractive effort vs diesel electric horsepower posted by isambard on thursday, june 3, 2004 12. By electric traction is meant locomotion in which the driving or tractive force is obtained from electric motors. The electric motors receive electric power either from an onboard power source e. The locomotion in which the driving force is obtained from electric motor is called the electric traction system. There currently are 24 different models available in the us that are diesel powered. Electric motors have a 1 moving part, the output shaft. Note that these are given in pence per vehicle so a 450 for example has two. Since the hybrid electric vehicle hev became mainstream with the launch of the toyota prius in 1997, the use of rare earth magnets in vehicle traction motors has become common.
Rail transport is coming back into favour for the transportation of goods over long distances. Energy supply basics and practical motive power and. This provides the gear reduction that allows the motor to drive the train at speeds of up to 110 mph. The focal point of the book will be the disposition of electric traction units powered by threephase induction motors. Traction motor drive regenerative breaking aa119 july 16, 2009 leos chalupa, ph. This article takes a look at the role that electric motors play in this sector of the transport industry. Successful test results of a much larger motor developed for the u. Electric traction has many advantages as compared to other nonelectrical systems of traction including steam traction. Advantages of electric motor vs diesel rigging doctor.
Otherwise, ill create unnecessary misery for myself and those around me. What are the advantages of using electric engines compared. Pdf electric vehicle traction motors without rare earth magnets. Electric traction system 1 electric traction system presented by amit raj roll no. Main and control equipment of modernized locomotive tep. System such a diesel electric drive, electric drive etc. The upfront costs of building such a railroad, however, are no doubt higher, which is why some commuter railroads arriving. Electric traction will continue to play a dominant role in the railway since it is an. Several types of diesel locomotive have been developed, differing mainly in the means by which mechanical power is conveyed to the driving wheels early internal combustion locomotives and railcars used kerosene and gasoline as their fuel. Apr 19, 2020 also, looking at electric operations from a costsversusbenefits standpoint, electric compared to diesel electric operation is more attractive. Also, looking at electric operations from a costsversusbenefits standpoint, electric compared to dieselelectric operation is more attractive. Hydrostatic type locomotives are usually small us 4 wheel and siderod type industrial switchers. 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 electric motor applies resistance to the drivetrain causing the wheels to slow down. Analysis, evaluation and simulation of railway dieselelectric and. The gas electrics generally had a better record than the gas mechanicals e. Permanent magnet dc traction motor with reconfigurable. What is the difference between dieselelectric and diesel. The last main component of the motor is the windings, which also do not move. Traction motors in diesel locomotives ee publishers. Full electric drive micro hybrid mild hybrid full hybrid series hybrid hybrid functions 210k 1242v 1020k 42100v 2080k 100300v 80110k 300600v. There are advantages and disadvantages to both forms of traction, and each is suitable for certain applications. 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. A thorough overview of motors for light rail traction applications and other types of vehicles as well is given by gieras and bianchi 17. Authors compare motors such as standard cage induction.
With due respect to all the engineers who have answered this question i wonder why they have restricted their answers to the usual efficiency and pollution aspect. There is one traction alternator or generator per diesel engine in a locomotive standard north american practice. Dieselelectric traction is a wellknown and established technology for railways. Electric traction system engineering seminar topics.
Click here for a pdf giving the various track charges. Traction power electrification system investigation report washington metropolitan area transit authority. Steves railroad pages, information on dieselelectric. Ive learned its crucial to stay loose in the saddle and keep doing the next right thing. 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. Most of the parts of a dieselelectric locomotive are electrical. What are the advantages of using electric engines compared to. Electric traction part 06 important terms in traction and two problems difference between distance and displacement distance is a scalar quantity that refers to how much ground an object. Pdf electric vehicle traction motors without rare earth. The diesel electric is a diesel engine that produces electricity for electric motors that power each axle located between each set of wheels. Electric traction the system which use electrical power for traction system i. A diesel locomotive is a type of railway locomotive in which the prime mover is a diesel engine.
Which is better electric traction or diesel traction. Diesel vs electric cars, which is better the pros and cons. Rail traction synchronous generators for dieselelectric locomotives abbs unique, vibration resistant traction generators boost the reliability of modern low emission engines. The biggest advantages of the electric traction lies in its power to weight rat. Electric traction mcqs answers pdf electrical engineering.
Steam, electric and dieselelectric traction nature. Dp1a405 coaches series unit with dieselelectric or electric traction units. Diesel locomotives the railway technical website prc rail. It is used in electric trains, tramcars, trolley buses and diesel electric vehicles etc. All other emus were already in use during the week, but at weekends theres some spare. Ppt electric traction system powerpoint presentation free. Diesel performance parts and products sinister diesel. 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. A book for students, electrical and mechanical engineers, superintendents of motive power and others by edward parris burch, first published in 1911, is a rare manuscript, the original residing in one of the great libraries of the world. 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.
Electric traction 114 to 158 introduction requirements of an ideal traction systems of traction speed time curve tractive effort coefficient of adhesion, selection of traction motors method of speed control saving by series parallel control, ac traction equipment. 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. Steam locomotive tractive effort vs diesel electric horsepower. Brushless dc motor design for electric traction system md. Jun 27, 20 electric traction the system which use electrical power for traction system i.
Each motor drives a small gear, which meshes with a larger gear on the axle shaft. In return, the energy from the wheels turns the motor, which functions as a generator, converting energy normally wasted during coasting and braking into electricity, which is stored in a battery until needed by the electric motor. Or electric traction means a locomotion in which the driving force is obtained from electric motors. I nthe past twentyfive years the dieselelectric locomotive has largely replaced the steamlocomotive in the united states and has gained much ground. This book is a reproduction of that original, which has been scanned and cleaned by stateoftheart publishing tools. The compact, high performance generators cover powers from 1 to over 3 mw with efficiencies up to 96.
If you continue browsing the site, you agree to the use of cookies on this website. Act of drawing or state of being drawn propulsion of vehicle is called tractions. Product note rail traction synchronous generators for. Economics of electric vs diesel traction railelectrica. Nov 05, 2015 electric motors have a 1 moving part, the output shaft. The traction motors provide propulsion power to the wheels. The former, i believe it used to be worked by two 4217s until two or three years ago when they went off to preservation. 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. With direct current, the most popular line voltages for overhead wire supply systems have been 1,500 and 3,000.
May 27, 2012 the diesel electric locomotive in the us are descendents of the gas electric cars and the dan patch line gas electric locomotives with a lot of electric locomotive experience thrown in. Modern locomotives have electric motors connected to the drive axles. Optimising power management strategies for railway traction. Rudolf diesel patented his first compressionignition. 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. This locomotive demonstrated that the dieselelectric power unit could provide many. The starting tractive effort should be high so as to have rapid acceleration.
There are various systems of traction prevailing in our country such as steam engine drive, electric drive. 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. All functional features of the motor control system were successfully tested on a small proof motor previously developed to. The hydraulic uses fluid pressure and that pressure is applied against impellers on each axle. Utilization of electrical enrgy and electric traction. If electric supply is used for driving a locomotive, the system is known as electric traction. From the following statements, can you identify those which are true or false concerning the electric. Traction power electrification system investigation wmata.
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