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. Unlike other vehicles with a sprung hollow shaft drive system, suspension bearing drives are used only for speeds of up to ca. Traction motor is the most important part of a locomotive. This provides the gear reduction that allows the motor to drive the train at speeds of up to 110 mph. About 25% of these are dc motor, 15% are ac motor, and 1% are other motor parts. Traction motors in diesel locomotives ee publishers. Esr 0601 overhaul of 48 class locomotive traction motors. Industrial locomotive parts, rebuilding, remanufacturing. 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.
Abb is the expert for traction converters, motors, transformers, and complete traction. 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. Match a locomotive part from column ii with its description in column i. Tube have been extensively used in locomotives to connect between frame. Hybrid regenerative system on power electronic transformer for. Ac vs dc traction motors o gauge railroading on line forum.
When fields are reversed, traction motors change their direction of rotation, with the. A wide variety of traction motor for locomotive options are available to you, such as gear motor, micro motor, and asynchronous motor. Traction motor for locomotive, traction motor for locomotive. Advancement of the operational definition system of the locomotive traction force during the calculations by electrical parameters of traction electric motor with regard to uneven load of wheel. Generally, the average speed of a freight train is lower than.
Click on individual diagrams to view each beginning with the series set, then the parallel set. Jan 17, 2015 depends on which locomotive mumbai suburban trains you see. Pdf definition of locomotive traction force with regard. Permanent magnet dc traction motor with reconfigurable winding. Series commutator motor, therefore it requires regular maintenance.
We, city cat international ltd confirm that we are not affiliated with wabco oem, alco, emd, ge, cat regarding exhibitedmentioned products on our webpage, catalogue, andor brochures. Serieswound dc motors have the disadvantage that, if wheelslip occurs in a standard dc drive, there is the tendency for the traction motor to speed up and run away, even to the point of mechanical failure if the power is not reduced quickly. Advancement of the operational definition system of the locomotive traction force during the calculations by electrical parameters of traction electric motor. All emd parts are backed by a comprehensive warranty. Pdf definition of locomotive traction force with regard to. Nosesuspended traction motor, dynamic interaction vehicletrack.
Our products are designed to meet the toughest applications, from extreme temperatures and altitudes, to heavy loading and load cycling. This page describes how dc traction motor cars work. How do traction motors work in electric locomotives. Our combo and traction motor services cover a broad spectrum and include complete inspection, maintenance, requalification, triage light motor repair, recondition and or rebuild as necessary. Bearings for traction motors roller bearings are used in all traction motors for electric locomotives and electric cars. The determination of the asynchronous traction motor. Can the traction motors in diesel locomotives be used as generatoras in regenerative braking. Abb is the expert for traction converters, motors, transformers, and complete traction chain solutions. 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. Rpi does represent that its replacement parts, components, subsystems.
As explain by aniruddha, traction motors work like any other electric motor. This system was of limited value since the power output of each motor was limited. Can the traction motors in diesel locomotives be used as. By the end of the 1960s, diesel had almost completely superseded steam as the standard railroad motive power on nonelectrified lines around the world. Fag gearbox, axle box and traction motor bearings in class. Alco locomotives are provided with dc series traction motor due to its high starting torque, the reversing of motor is made simple by changing the field direction, dynamic brake is achived by. Each motor drives a small gear, which meshes with a larger gear on the axle shaft. Modern electric locomotives, like their dieselelectric counterparts, almost universally use axlehung traction motors, with one motor for each powered axle. In the event that any special items are required they can be shipped as soon as they are completed. Electric drives manufacturer, including synchronous traction motors for electrical or dieselelectrical locomotives, multiple units, trams and working vehicle with main and.
Depends on which locomotivemumbai suburban trains you see. 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 previously used plain friction bearings also known as support bearings used from. We are recognized internationally as an industry leader in electric motor repair, rewinding and load testing. Diesel locomotives never reached the speeds of electric locomotives. Now, the normal practice is to use one traction motor to drive each axle through a gear drive. In the case of small motors, deep groove ball bearings may also be used. Introduction solutions for traction systems our stateoftheart solutions allow our customers to enjoy the benefits of standardized housings combined with maximum reliability. Ac traction vs dc traction greenville, south carolina.
A thread a day or two ago addressed the shipment of motors, axles, and wheels. Request pdf the determination of the asynchronous traction motor characteristics of locomotive the article deals with the problem of the locomotive. Rpi is not an authorized emd distributor and is not otherwise associated or affiliated with emd. Feb 22, 2016 as explain by aniruddha, traction motors work like any other electric motor. 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. First, in a standard dc drive, if wheel slip occurs, there is a tendency for the traction motor to speed up and run away, even to the point of mechanical failure if the load is not quickly reduced. We offer a wide portfolio of innovative components tailored to the needs of various traction converters and auxiliary power supplies. So, when one traction motor goes west, a spare truck replaces the truck with the bad motor, and then the motor can be replaced in the truck while the locomotive itself is returned to service, without waiting for the replacement motor to be installed. The motor had two field poles, which allowed a limited amount of vertical movement of the armature. The traction motor is a four pole dc series motor in which field winding is connected in series with armature. He was probably talking about the gearcase only, as the frame of ge motors has always been considered more robust than that of emd motors.
This handbook on maintenance of traction motor cooling blower and its motor has been prepared by camtech with the objective of. For over 80 years, our company has focused on keeping your motor running at optimum performance. A natural extension of this is to provide repair and rebuild services for locomotive components. This provides the gear reduction that allows the motor to drive the train at speeds of up. Pdf stator currentbased locomotive traction motor bearing.
Traction motor article about traction motor by the free. A reliable online bearing faultdiagnostic technique is. This would only apply to large fleets of recent design where maximum availability is important. In fact, one can use the ac traction locomotive to hold a heavy train on a grade, release the air brakes on the train, and then start the train, without doing any heat damage. Choices in column ii may be used once, more than once, or not at all. Give us a call with your needs and let our professional team get you the traction motor you are looking for. The trains speed pattern determines many design aspects for traction motors used in locomotives. Pdf rollingelement bearings are critical components in locomotive traction motors. Ac induction motors known as asynchronous traction motors.
Usually, cylindrical roller bearings are utilized due to their highspeed and heavyload capabilities, as well as their ease of assembly and disassembly. Therefore, at full power, as the speed drops the traction force goes up until either the motors overheat or the wheels spin. Massachusetts institute of technology 1 introduction this is a concept paper in response to the foa entitled rare earth alternatives in critical technologies. Pdf the article examines curves controlling asynchronous traction motors increasingly used in locomotive electric drives the main task of which is to. The drive system is supported both by the traction motor suspension in the bogie frame and directly on the wheelset axle in socalled suspension bearings. Transverse movement is limited by the flanges of axle suspension bearing. This project is to design, build and test a prototype locomotive traction motor based on a new electric machine technology defined as a permanent magnet direct. The traction motors provide propulsion power to the wheels. Depending on the model, a single traction motor can generate up to 700 to 900 amps across a 215 volt field.
There are three primary reasons that ac traction offers so much more adhesion. How much would the traction motor axle wheel assembly weigh. Traction motors six ge750 motorgenerator sets two gmg152al. Having been in train service as a locomotive engineer, he worked his way up to chief mechanical officer. 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. On mainline locomotives, wap1, wap4, wam4, wag567 and wcam123 all use dc series motor as their traction motors. Power circuit of traction motor,during series parallel. Ac electric has over 60 years of experience in the repair and overhaul of ac and dc motors for industries throughout new england.
Traction motors 5ge763 5ge747 5ge741 5ge733 emd d77b emd d77e ge1244 ge 752e8 generators. He began his railroad career in 1986 at the mid atlantic railroad in chadbourn n. Traction motor is the most important part of any locomotive converting electrical energy into mechanical requiring sturdiness of electrical, mechanical, magnetic and insulation system for safe and reliable function. Permanent magnet dc traction motor with reconfigurable. A 15ton train traction motor near the end of its life enters a bay door on one side of general electric co. Permanent magnet dc traction motor with reconfigurable winding control idea program final report for the period june, 2003 through september, 2006 contract number hsr44 prepared for the idea program transportation research board national research council nicholas n. Traction motor service tms offers a wide selection of quality rebuilt equipment. In just simple terms, the biggest two advantages of ac traction motors over dc traction motors are. Power circuit of locomotive, traction motor operation and sequence of series parallel and series parallel with shunt operation, showed with animated video. This was the same way that steam locomotives would turn their drive wheels. Traction motor simple english wikipedia, the free encyclopedia. Ac77 ac torque motor features mechanically compatible with the d77 motor, the a77 fits in same pedestal position in the locomotive truck bogie. Traction motors in diesel locomotives are electric motors, if the process were to be reversed cant it be used as generator. D29, d31, d43, d77e, d78, d87, d87b, d87btr, d88, d90, d100 emd and electromotive are trade designations of electromotive diesel, inc.
Review of characteristics of different types of dc and ac motors used traction. Dynamic behaviour of locomotive with axlemounted traction motors. A wide variety of locomotive traction motor options are available to you, such as ccc, ce, and ul. Progress rails genuine emd oem components are available for locomotive, marine and power generation applications. The basic arrangement of the final drive gear system of domestic main line diesel electric locomotives has remained unchanged over the years. Dc series traction motor of alco locomotives youtube. Solutions for traction systems infineon technologies.
Electric propulsion controls and accessories a 77 a torque. Jul 25, 2005 so, when one traction motor goes west, a spare truck replaces the truck with the bad motor, and then the motor can be replaced in the truck while the locomotive itself is returned to service, without waiting for the replacement motor to be installed. These traction motors are made in strict compliance to oem specifications and being used widely by first class railroads. These motors were traditionally dc but the development of modern power and control electronics has led to the introduction of 3phase ac motors. Total solutions for quality locomotive electrical rotating. Work is expressed in footpounds per second because the element of time is important. Rail products international products ge traction motors. Pdf the aspect of vector control using the asynchronous traction. Advanced rail motor testing at brush traction loughborough the heritage of brush traction at its 70 acre site in loughborough stretches back to 1864, when the henry hughes locomotive works was established to service the rapidly growing need of the victorian railway age for locomotives. Adding further to your knowledge, there are two types of motor with used in electric traction in india i. The limitations of the torque of the traction motor when powered by. Aug 07, 20 traction motor since the dieselelectric locomotive uses electric transmission, traction motors are provided on the axles to give the final drive. Our large in stock inventory allows us to ship materials directly when they are ordered.
It is a forced ventilated machine arranged for axle mounting on sleeve bearing. Emd, ge traction motors city cat international ltd. During this same time period, the ratings of these locomotives and demands on the gear train have increased considerably. Rpi expands traction motor cable offering rpi a long standing manufacturer of emd compatible cables expands into ge cables. Advanced rail motor testing at brush traction loughborough. At our 24,000 square foot facility located in bangor, maine we have the expertise to rebuild locomotive continue reading railroad services. Locomotive motors remanufactured at north las vegas plant. Before the mid20th century, a single large motor was often used to drive multiple wheels through connecting rods. These locos constitute a huge chunk of irs locos easily above 70. Ge is working on permag traction motors for locomotives, expectations are to get 25% more torque for a given motor size or the motor could be made smaller and lighter for a given power output which may be the reason for uisng them on the coach bogies. In deep and trustful partnerships with vehicle builders, refurbishers, and rail operators, we supply stateoftheart traction systems. Traction systems for locomotives and high speed applications. As the traction motor cooling is more effective on the ac motors, the ac locomotives can produce more low speed traction force for a longer period of time without overheating the motors.
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