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. Steves railroad pages, information on dieselelectric. The traction motors provide propulsion power to the wheels. Electric traction mcqs answers pdf electrical engineering. The map used to trace out circuits and locate trouble on diesel electric locomotives is called a schematic diagram. Richards, electrical engineer to the london and north eastern railway, makes. Pdf electric vehicle traction motors without rare earth. In diesel electric railways because of variable train speed, a sort of compromise is taking. Rudolf diesel patented his first compressionignition. This traction power can be diesel, steam or electric power. Jun 27, 20 electric traction the system which use electrical power for traction system i. Converts the power output of the diesel engine into elec trical power.
Electric power systems research xxx 2016 xxxxxx fig. Types of traction systems electrictraction systems can be broadly divided into those using alternating current and those using direct current. For the most part, these locomotives are built to serve regional, niche markets with a very specific purpose. Jun 30, 2007 no videos please keep this a photo group photographs of modern and steam locos from britain please. This ppt helps to understand the concept of electric traction slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Multiengine genset ultra low emissions roadswitcher locomotive pdf. If you continue browsing the site, you agree to the use of cookies on this website. Federal transit administration december 9, 2016 8 new insulators that can be removed for cleaning and then reinstalled. Soder1 1 kth, sweden abstract the objective of this paper is initially to present a basic modeling of the railway traction system. No videos please keep this a photo group photographs of modern and steam locos from britain please. The equipments should be capable of withstanding large temporary loads. Pdf development of integrated traction and auxiliary power supply converters designed for dieselelectric rail vehicles is described. All heating requirements in domestic purposes such as cooking, room heater, immersion water heaters, and. An electrodiesel locomotive also referred to as a dualmode or bimode locomotive is powered either from an electricity supply like an electric locomotive or by using the onboard diesel engine like a dieselelectric locomotive.
Vehicle components ford focus electric forum, my focus electric. Ac motors can be designed for higher maximum speeds, thus a smaller torque and volume for a given power rating. Ppt electric traction system powerpoint presentation free. Traction inverter locomotive and traction control the control system of the entire locomotive is based on microcomputer technology. Pdf in article analysing typical electrical locomotives were manufactured with analogous control systems 2m62, tep70 of the entire power train and.
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. This provides the gear reduction that allows the motor to drive the train at speeds of up to 110 mph. Reverses the direction of current in the traction motor field winding. 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. Electric traction 1701 however, the steam locomotive suffers from the following disadvantages.
Advanced rail motor testing at brush traction loughborough. Any british loco photo can be placed on here from last days of steam to diesel galas, but there is some group rules to keep photos under control. Traction systems for locomotives and high speed applications. Steam, electric and dieselelectric traction nature. Traction is defined as the act of drawing or pulling especially by a motive force drawing of carriage by horse constitute traction. Abb is the expert for traction converters, motors, transformers. 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.
The ford focus electrics drive motor has a much higher rpm range than a gasoline engine, so the transmission had to be designed to handle it. The starting tractive effort should be high so as to have rapid acceleration. Methods of electrialc heating resistance, arc, induction and dielectric heating. It is used in electric trains, tramcars, trolley buses and diesel electric vehicles etc. Each motor drives a small gear, which meshes with a larger gear on the axle shaft. With direct current, the most popular line voltages for overhead wire supply systems have been 1,500 and 3,000.
Operation of traction vehicles with 3f induction motors in. Sep 29, 2009 this ppt helps to understand the concept of electric traction slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. The main reason why diesel locomotives are hybrid is because this eliminates the need for a mechanical transmission, as found in cars. Haut f j g the history of the electric locomotive, george allen and unwin, 1967, pp147 plus 258 illustrations of electric traction. A dieselelectric transmission system includes a diesel engine connected to an electrical generator, creating electricity that powers electric traction motors. There are various systems of traction prevailing in our country such as steam engine drive, electric drive.
Vehicle components ford focus electric forum, my focus. Abbs proven traction generator technology comes from. Product note rail traction synchronous generators for diesel. Traction power electrification system investigation report washington metropolitan area transit authority. 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. Traction power electrification system investigation wmata. Electric traction the system which use electrical power for traction system i. Authors compare motors such as standard cage induction.
Dieselelectric locomotive sd90mac with threephase drive. A comprehensive history of the development of electric rail traction from the middle of the 19th century. B, diploma and other equivalent engineering examinations unknown binding january 1, 1978. System of electric traction mechanics of train movement.
All heating requirements in domestic purposes such as cooking, room heater, immersion water heaters, and electric toasters and also in industrial. 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 in diesel locomotives ee publishers. The supplemental energy source is an electric storage device e. I nthe past twentyfive years the dieselelectric locomotive has largely replaced the steamlocomotive in the united states and has gained much ground. 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.
Electric traction has many advantages as compared to other nonelectrical systems of traction including steam traction. Traction motors are used in electrically powered rail vehicles such as locomotives and trolleys, as well as vehicles with electrical transmission systems such as dieselelectric, and some. This locomotive demonstrated that the dieselelectric power unit could provide many of the benefits of an electric locomotive without the railroad. 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. Acs of dcdc typical dieselelectric locomotive 2m62 traction generator, when low power singlephase ac generator e is used and magnetic amplifier. The map used to trace out circuits and locate trouble on dieselelectric locomotives is called a schematic diagram. Modernization of dieselelectric locomotive 2m62 and tep70.
Engines for locomotive traction anglo belgian corporation. Traction system can be broadly classified as steam engine drive, internal combustion engine drive and. Rail traction synchronous generators for dieselelectric locomotives abbs unique, vibration resistant traction generators boost the reliability of modern low emission engines. Lets start by understanding why cars have transmissions. Electric traction system 1 electric traction system presented by amit raj roll no. Dc traction motors are direct current electric motors that provides the rotational torque of a machine, usually for conversion into linear motion traction. Pdf integrated traction and auxiliary power supply converters for. A diesel locomotive is a type of railway locomotive in which the prime mover is a diesel engine. If electric supply is used for driving a locomotive, the system is known as electric traction. There are various system of electric traction existing such as electric train, trolley buses, diesel electric vehicles and gas turbine electric vehicles. In a paper read before the institution of civil engineers on february 21, h. Ppt electric traction system powerpoint presentation. By electric traction is meant locomotion in which the driving or tractive force is obtained from electric motors.
This paper shows that efficiency chains for railway diesel and electric traction units can be combined with unit costs of fuel to give a valid comparison between diesel and electric traction options on. Pdf electric vehicle traction motors without rare earth magnets. With dynamic braking, the locomotives wheels are used to drive the traction motors. The ford focus electric transmission is a single speed transmission. Steam locomotive tractive effort vs diesel electric horsepower posted by isambard on thursday, june 3, 2004 12. The traction motors, four in number, were axlemounted and transmitted power to the road. Analysis, evaluation and simulation of railway dieselelectric and. The gas electrics generally had a better record than the gas mechanicals e.
Steam locomotive tractive effort vs diesel electric horsepower. 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. The british rail steam, diesel and electric traction pool. Electric traction system engineering seminar topics. Utilization of electrical enrgy and electric traction. 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. 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.
Archive british diesel and electric traction 3 youtube. It comprises a sibas 16 traction control unit for each inverter and a locomotive control unit. British rail steam, diesel and electric traction flickr. There are advantages and disadvantages to both forms of traction, and each is suitable for certain applications. Act of drawing or state of being drawn propulsion of vehicle is called tractions. Rail transport is coming back into favour for the transportation of goods over long distances. The permissible range of voltages allowed for the standardised voltages is as stated in standards bs en 50163 and iec 60850. A traction system that doesnt use electrical energy for the movement of vehicle at any stage is referred as non electric traction system. 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. Brush traction is now positioned as a one stop shop for the servicing and repair of all aspects of locomotive electric traction motors, this also includes diesel electric generator sets both dcac, alternators and auxiliary motors.
A dieselelectric transmission, or dieselelectric powertrain is a transmission system for vehicles powered by diesel engines in road, rail, and marine transport. Thirdrail systems are predominantly in the 600750 volt range. Utilization of electric power and electric traction. Pdf modernization of dieselelectric locomotive 2m62 and tep. In mechanical terms, it is defined as the adhesive friction between the wheel and the surface on which it moves between a car tire and road. This control unit processes the commands coming from the driver or trainlines to form the reference values for. Before diesel engines came into widespread use, a similar system, using a petrol gasoline engine and called petrolelectric or gaselectric, was sometimes. The abc dzc family of engines is well known for the low maintenance need, the. 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. Modern locomotives have electric motors connected to the drive axles. A hybrid electric vehicle combines two energy sources to produce traction drive power. First, any engine has a redline a maximum rpm revolutions per minute. Optimising power management strategies for railway traction.
Topology considerations in hybrid electric vehicle powertrain. The locomotion in which the driving force is obtained from electric motor is called the electric traction system. Modern diesel electric locomotives are mostly propelled by ac motors, in general three phase induction motors. Product note rail traction synchronous generators for. The traction system can be classified as non electric and electric traction systems. Electric traction will continue to play a dominant role in the railway since it is an. Auxiliary power supply is a low voltage acdc power supply for onboard devices with an important consideration for safety equipment. Electric traction mcqs answers pdf electrical engineering multiple choice questions answers. A thorough overview of motors for light rail traction applications and other types of vehicles as well is given by gieras and bianchi 17. 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 electric motors receive electric power either from an onboard power source e. This article takes a look at the role that electric motors play in this sector of the transport industry. The transmission in the ford focus electric was designed with specific emphasis on slient operation and efficiency. Your car needs a transmission because of the physics of the gasoline engine. The compact, high performance generators cover powers from 1 to over 3 mw with efficiencies up to 96. 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. Topology considerations in hybrid electric vehicle. This model includes the basic technologies used today. 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. Typically, the primary energy source prime mover is an ice although it could also be a fuel cell. Or electric traction means a locomotion in which the driving force is obtained from electric motors.
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