In an electric traction system the driving force to pull a train is generated by the traction motors. Locomotive and traction control the control system of the entire locomotive. Why ac traction induction motor used in an electric train enginelocomotive is explained in the video. 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. Emd the locomotive can be equipped with 4300 thp engine or with the four. Rotors for high efficiency traction motors, society of automotive engineers world congress, april 22, 2009, detroit. With dynamic braking, the locomotives wheels are used to drive the traction motors. When you are in the market for an rto utex or outright purchase of a replacement traction motor, give us a call and let us help you find the right traction motor to keep you locomotive running smoothly. The lowmounted lowspeed motors drove the axles via multipart coupling rods. Rpi repairs, rebuilds and remanufactures ge traction motors, including. Abb is the expert for traction converters, motors, transformers.
Two dieselelectric locomotive energy systems work n. However apart from traction motors, many other motors and equipments are provided in electric locos. Abb traction motors for electric multiple unit emu id. Locomotive without an engine electricity for traction motors provided by another locomotive called a mother useful concept where train speeds are below 20 mph and two locomotives are needed above 20 mph not enough power available from mother loco. Rail products international products ge traction motors. Usually one motor is provided per axle but in some older generation of locos two axles were driven by a single traction motor also. The track electrification refers to the type of source supply system that is used while powering the electric locomotive systems. Eff ortspeed curves in the diesel electric locomotive having acac system in order to make the required tractive eff ortspeed curves for electric drives with asynchronous traction motors of acac system in dieselelectric locomotives, it is necessary to look for the optimum way of controlfig.
Pdf operation analysis of ac traction motors in terms of. The passage of electric current through rolling bearings can lead to damage in a short period of time. The traction motor is suitable for a range of vehicle applications, from medium size passenger cars to light duty commercial vehicles. The article examines curves controlling asynchronous traction motors increasingly used in locomotive electric drives the main task of which is to create a. They provide the propulsion, the suspensions and the braking.
Esr 0601 overhaul of 48 class locomotive traction motors. Why is ac motor used in electric train engine nowadays. The contractfor 300 shunter locomotives and an 18year 175 passenger evolution service agreementmarks a continued commitment to kazakhstans rail infrastructure chicago, january 17, 2018 ge transportation nyse. The map used to trace out circuits and locate trouble on diesel electric locomotives is called a schematic diagram.
Pdf the aspect of vector control using the asynchronous. Resultant field flux produced in the air gap, due to time and space varying each phase flux, is of constant magnitude but rotating at a synchronous speed of ns. To compliment the acela high speed trains on the nec, the locomotive has excellent acceleration capabilities and reaches a max. Abb library is a web tool for searching for documents related to abb products and services. The determination of the asynchronous traction motor.
The general arrangement of the locomotive is shown on elevation and floor plan drawing attached. We tailor every motor according to specification with regard to e. To enable the locomotive to perform this task, it is equipped with suitable equipments, which enable loco pilot to. Adding further to your knowledge, there are two types of motor with used in electric traction in india i. Traction motors include both modular and frameless traction motors. Emdgp38 static excitation locomotive maintenanceelectrical. The traction motors on a diesel electric locomotive can be reversed to facilitate breaking, however a train with a full consist still takes some distance to stop.
As explain by aniruddha, traction motors work like any other electric motor. Abb is the expert for traction converters, motors, transformers, and complete traction chain solutions. Modernization of dieselelectric locomotive 2m62 and tep70 locomotives with respect to electrical subsystem article pdf available in procedia engineering 187. As we all know, it is electric locomoti ves that are at the forefr ont of railway traction, while the diesel locomotive is kept for some very specific uses.
Pdf modernization of dieselelectric locomotive 2m62 and. Three phase primary winding is mounted on stator distributed spatially at 120 degree. The locomotives had an hourly rating of 780 kw and 1,200 kw respectively and a top speed of 75 kmh. Considering the problem associated with commutation, the challenge had been how to use threephase induction motor for traction application because of simple, robust, efficiency, less maintenance features. By the end of the 1960s, diesel had almost completely superseded steam as the standard railroad motive power on nonelectrified lines around the world. Electric traction system 1 electric traction system presented by amit raj roll no. There are various systems of traction prevailing in our country such as steam engine drive, electric drive. This is the first complete transfer of a high speed electric locomotive to the us. It differs from electric locomotives principally in that it has its own generating station instead of being connected to a remote generating station through overhead wires. Electrics of diesel locomotive indian railways institute. Rpi is not an authorized ge distributor and is not otherwise associated or affiliated with ge. By taking advantage of the traction motors ability to act as a generator, the diesel electric locomotive offers a form of braking power which, without the use of air, can be used as a speed controlling brake on grades. What is an electric locomotive systems and their types in.
Multiple drive systems per vehicle can be supported due to the safety case and levels of torque integrity employed. The limitations of the torque of the traction motor when powered by. Dieselelectric locomotive sd90mac with threephase drive. Abbs locomotive motors with welded stator frame cover the whole range of freight, passenger and multipurpose locomotives. Operation analysis of ac traction motors in terms of electromagnetic.
Traction motors traction motors for locomotive output. Permanent magnet dc traction motor with reconfigurable winding. The capital cost of laying 5 to 6 kilometers of traction wires is equivalent to. Traction motors are used in electrically powered rail vehicles such as electric multiple units and electric locomotives. The advantage of ac motor in the train is explained. Gp382 2000 hp dieselelectric general purpose locomotive. Included in multiple ul recognized insulation systems. The installation of dynamic braking on diesel electric locomotives has become quite common.
Electric traction 1701 however, the steam locomotive suffers from the following disadvantages. Overhaul of locomotive traction motors a contract will be issued to the successful bidder for a period of five years. Electric locos derive tractive effort from traction motors which are usually placed in the bogie of the locomotive. High frequency stray electric currents are unavoidable in most current applications. The major disadvantage of the electric locomotive engine compared to the diesel locomotive engine is the requirement for power supply in the form of overhead electric lines. The focus is primarily on ac locomotivesthose with ac inverters and traction motorsbut much of the discussion also applies to dc locomotives. Traction motors in diesel locomotives ee publishers. Diesel electric locomotive has electric drive in form of traction motors driving the axles and controlled with electronic controls. 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 electric traction system can be broadly divided into two groups. The system which use electrical power for traction system i. Optimized edrivetrain motor platform using our broad technology portfolio, ensuring maximum performance and reliability. 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.
Abb traction motors for locomotive traction motors. Ac induction motor is equivalent to transformer where secondary is short circuited and free to rotate. Traction motor is the most important part of a locomotive. 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 electric locomotives with onboard fueled 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. These motors were in application for traction from the very inception of electric traction. Traction motors traction motors and generators abb. Traction systems for locomotives and high speed applications. The final decade of the 20 th century and the first decade of the 21 st century were marked by the enormous rise in high speed due to the huge leaps forward in electric locomotive technology. Mi2029 alco maintenance manual, electrical rotating equipment. Act of drawing or state of being drawn propulsion of vehicle is called tractions.
This project is to design, build and test a prototype locomotive traction motor based on a new electric machine. How do traction motors work in electric locomotives. A traction motor is used to make rotation torque on a machine. It is used for local delivery of good in large towns with maximum daily run of 50 to 60 km. Three phase induction motor as traction motor railelectrica. Electric vehicle and electric motor traction motor refers to a type of electric motor.
The map used to trace out circuits and locate trouble on dieselelectric locomotives is called a schematic diagram. Efficiency is as important in drive systems for hybrid electric vehicle drive motors as it is for industrial. Ppt electric traction system powerpoint presentation. 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. Speed was controlled using switchable stator poles.
As you can imagine, they are tremendous structures. 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. A traction motor is an electric motor used to operate a piece of machinery. In deep and trustful partnerships with vehicle builders, refurbishers, and rail operators, we supply stateoftheart traction systems.