How much would the traction motor axle wheel assembly weigh. These motors were traditionally dc but the development of modern power and control electronics has led to the introduction of 3phase ac motors. In just simple terms, the biggest two advantages of ac traction motors over dc traction motors are. Introduction solutions for traction systems our stateoftheart solutions allow our customers to enjoy the benefits of standardized housings combined with maximum reliability.
Traction motor simple english wikipedia, the free encyclopedia. Rpi does represent that its replacement parts, components, subsystems. Pdf the aspect of vector control using the asynchronous traction. Modern electric locomotives, like their dieselelectric counterparts, almost universally use axlehung traction motors, with one motor for each powered axle. 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. 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. 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. 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. Before the mid20th century, a single large motor was often used to drive multiple wheels through connecting rods. Usually, cylindrical roller bearings are utilized due to their highspeed and heavyload capabilities, as well as their ease of assembly and disassembly. A 15ton train traction motor near the end of its life enters a bay door on one side of general electric co. Fag gearbox, axle box and traction motor bearings in class. Review of characteristics of different types of dc and ac motors used traction. Traction systems for locomotives and high speed applications.
A reliable online bearing faultdiagnostic technique is. Rpi expands traction motor cable offering rpi a long standing manufacturer of emd compatible cables expands into ge cables. This handbook on maintenance of traction motor cooling blower and its motor has been prepared by camtech with the objective of. Abb is the expert for traction converters, motors, transformers, and complete traction chain solutions. Adding further to your knowledge, there are two types of motor with used in electric traction in india i. Tube have been extensively used in locomotives to connect between frame. Diesel locomotives never reached the speeds of electric locomotives. Industrial locomotive parts, rebuilding, remanufacturing. Ac electric has over 60 years of experience in the repair and overhaul of ac and dc motors for industries throughout new england.
During this same time period, the ratings of these locomotives and demands on the gear train have increased considerably. 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. Bearings for traction motors roller bearings are used in all traction motors for electric locomotives and electric cars. Power circuit of locomotive, traction motor operation and sequence of series parallel and series parallel with shunt operation, showed with animated video.
These traction motors are made in strict compliance to oem specifications and being used widely by first class railroads. Electric propulsion controls and accessories a 77 a torque. As explain by aniruddha, traction motors work like any other electric motor. 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 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. A thread a day or two ago addressed the shipment of motors, axles, and wheels. Dynamic behaviour of locomotive with axlemounted traction motors. 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. 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.
Therefore, at full power, as the speed drops the traction force goes up until either the motors overheat or the wheels spin. Ac77 ac torque motor features mechanically compatible with the d77 motor, the a77 fits in same pedestal position in the locomotive truck bogie. 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. Series commutator motor, therefore it requires regular maintenance. Dc series traction motor of alco locomotives youtube. In deep and trustful partnerships with vehicle builders, refurbishers, and rail operators, we supply stateoftheart traction systems. The limitations of the torque of the traction motor when powered by.
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. Esr 0601 overhaul of 48 class locomotive traction motors. When fields are reversed, traction motors change their direction of rotation, with the. Generally, the average speed of a freight train is lower than. Give us a call with your needs and let our professional team get you the traction motor you are looking for. Permanent magnet dc traction motor with reconfigurable winding. About 25% of these are dc motor, 15% are ac motor, and 1% are other motor parts. Depending on the model, a single traction motor can generate up to 700 to 900 amps across a 215 volt field. Abb is the expert for traction converters, motors, transformers, and complete traction.
This would only apply to large fleets of recent design where maximum availability is important. Traction motors 5ge763 5ge747 5ge741 5ge733 emd d77b emd d77e ge1244 ge 752e8 generators. 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. Pdf definition of locomotive traction force with regard to. 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.
Massachusetts institute of technology 1 introduction this is a concept paper in response to the foa entitled rare earth alternatives in critical technologies. There are three primary reasons that ac traction offers so much more adhesion. Click on individual diagrams to view each beginning with the series set, then the parallel set. 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. Choices in column ii may be used once, more than once, or not at all. All emd parts are backed by a comprehensive warranty. Emd, ge traction motors city cat international ltd. 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. The traction motors provide propulsion power to the wheels. 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. For over 80 years, our company has focused on keeping your motor running at optimum performance. Hybrid regenerative system on power electronic transformer for. Each motor drives a small gear, which meshes with a larger gear on the axle shaft. This provides the gear reduction that allows the motor to drive the train at speeds of up.
He began his railroad career in 1986 at the mid atlantic railroad in chadbourn n. It is a forced ventilated machine arranged for axle mounting on sleeve bearing. Traction motor is the most important part of a locomotive. This was the same way that steam locomotives would turn their drive wheels. The basic arrangement of the final drive gear system of domestic main line diesel electric locomotives has remained unchanged over the years. Locomotive motors remanufactured at north las vegas plant. These locos constitute a huge chunk of irs locos easily above 70. Work is expressed in footpounds per second because the element of time is important. Unlike other vehicles with a sprung hollow shaft drive system, suspension bearing drives are used only for speeds of up to ca. Pdf the article examines curves controlling asynchronous traction motors increasingly used in locomotive electric drives the main task of which is to.
Traction motors six ge750 motorgenerator sets two gmg152al. Traction motors in diesel locomotives are electric motors, if the process were to be reversed cant it be used as generator. Our products are designed to meet the toughest applications, from extreme temperatures and altitudes, to heavy loading and load cycling. Ac induction motors known as asynchronous traction motors. Total solutions for quality locomotive electrical rotating.
Ac traction vs dc traction greenville, south carolina. Can the traction motors in diesel locomotives be used as generatoras in regenerative braking. 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. On mainline locomotives, wap1, wap4, wam4, wag567 and wcam123 all use dc series motor as their traction motors. D29, d31, d43, d77e, d78, d87, d87b, d87btr, d88, d90, d100 emd and electromotive are trade designations of electromotive diesel, inc. This provides the gear reduction that allows the motor to drive the train at speeds of up to 110 mph.
The trains speed pattern determines many design aspects for traction motors used in locomotives. Our large in stock inventory allows us to ship materials directly when they are ordered. Match a locomotive part from column ii with its description in column i. 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. At our 24,000 square foot facility located in bangor, maine we have the expertise to rebuild locomotive continue reading railroad services. Rail products international products ge traction motors. 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. 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. Traction motor for locomotive, traction motor for locomotive. Permanent magnet dc traction motor with reconfigurable. 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.
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. In the case of small motors, deep groove ball bearings may also be used. A wide variety of traction motor for locomotive options are available to you, such as gear motor, micro motor, and asynchronous motor. Transverse movement is limited by the flanges of axle suspension bearing. Advanced rail motor testing at brush traction loughborough. 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. A traction motor is an electric motor used for propulsion of a vehicle, such as locomotives or electric roadway vehicle 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 electrical transmission systems diesel.
A wide variety of locomotive traction motor options are available to you, such as ccc, ce, and ul. We offer a wide portfolio of innovative components tailored to the needs of various traction converters and auxiliary power supplies. Pdf rollingelement bearings are critical components in locomotive traction motors. Now, the normal practice is to use one traction motor to drive each axle through a gear drive. Request pdf the determination of the asynchronous traction motor characteristics of locomotive the article deals with the problem of the locomotive. Solutions for traction systems infineon technologies.
Nosesuspended traction motor, dynamic interaction vehicletrack. Ac vs dc traction motors o gauge railroading on line forum. The determination of the asynchronous traction motor. We are recognized internationally as an industry leader in electric motor repair, rewinding and load testing. How do traction motors work in electric locomotives. Having been in train service as a locomotive engineer, he worked his way up to chief mechanical officer.
Rpi is not an authorized emd distributor and is not otherwise associated or affiliated with emd. Advancement of the operational definition system of the locomotive traction force during the calculations by electrical parameters of traction electric motor. 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. 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. Traction motor article about traction motor by the free.
A natural extension of this is to provide repair and rebuild services for locomotive components. This page describes how dc traction motor cars work. Pdf stator currentbased locomotive traction motor bearing. Traction motor service tms offers a wide selection of quality rebuilt equipment. 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. Progress rails genuine emd oem components are available for locomotive, marine and power generation applications. Can the traction motors in diesel locomotives be used as. Pdf definition of locomotive traction force with regard. Feb 22, 2016 as explain by aniruddha, traction motors work like any other electric motor.
The previously used plain friction bearings also known as support bearings used from. As a global supplier of reconditioned and core locomotive components, we have earned our. 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. Power circuit of traction motor,during series parallel.
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