North american supply chain for traction motors and pe. Electric propulsion controls and accessories a 77 a torque. Rpi expands traction motor cable offering rpi a long standing manufacturer of emd compatible cables expands into ge cables. The procedure to design of the traction drive control with improving dynamic and power characteristics is offered. Multiple drive systems per vehicle can be supported due to the safety case and levels of torque integrity employed. Ac traction motor wag9, kirloskar electric company, india. Rail products international products ge traction motors. Irwin car and equipment acquires traction motor service.
Ac traction motors typically synchronous induction motors. A wide variety of ac traction motor options are available to you, there are 356 suppliers who sells ac traction motor on, mainly located in asia. Ac vs dc traction motors o gauge railroading on line forum. 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. Supco canada railway supply is neither authorized emd and ge distributor nor otherwise associated or affiliated with emd and ge.
The tractive effort of a locomotive whether ac or dc is defined by the equations. The ac drive works by converting the traction alternator output to dc direct current and reconverting it to a variable frequency ac which powers ac traction motors. Shell tmh gear grease and shell tm gear grease are lithium soap thickened gear lubricants containing extreme pressure additives. Ac motors for continuous miners 9 motors manufactured. Abb is the expert for traction converters, motors, transformers, and complete traction chain solutions. Drives employing voltage source inverters, current source inverters, and induction and synchronous motors have been discussed. Right from the introduction of electric traction, there was a strong desire to use three phases induction motor for traction application. Irwin, pa, march 31, 2014 irwin car and equipment, which engineers and manufactures custom heavyduty material handling equipment for a wide range of industries and applications, has purchased traction motor service tms, a fullservice custom motor manufacturer and railroad motor repair center based in.
Dc series motor due to its high starting tourqe and variable speed characterstics. Ac mining motors tve transvaal electric motors pty ltd. I hope this doesnt sound like too much of a dumb questionwith regards to the new emds and ges what is the difference between running ac vs dc. Ac traction vs dc traction greenville, south carolina. 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 motor for lowfloor vehicles integrated traction motor design for low floor vehicles traction motor application principles 5 especially for multiple units and mass transit vehicles, traction motors are used that are connected to the gearbox via a cardan shaft. American traction systems electric propulsion controls and accessories. Dec 16, 2007 the main work of a dc motor is done by the windings on the armature rotor and that poses a minor problem with cooling. Thyristors in railway traction how can their effects be. 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. Every train needs a unique motor or generator for its purpose. Tilly industries carries a large inventory of ge locomotive parts. Emd and ge are registered trademarks for electromotive diesel inc.
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. Ashwoods electric motors manufacturer of axial flux and interior permanent magnet motors. In light of government advice and to help protect the safety of our traction family and support the amazing work being done by all key workers, we have taken the decision to temporarily close our offices both in northern ireland and the republic of ireland. Massachusetts institute of technology 1 introduction this is a concept paper in response to the foa entitled rare earth alternatives in critical technologies. Our ac mining motor range covers the following mining machines. The m r engineering group has evolved into a one stop shop for electrical and mechanical engineering needs. Alok kumar gupta, who is appointed as joint managing director of your company from 15th march, 20. The earliest electrifications used dc because it was chea simp and ple to construct electric motors which would run directly off the lineside supply.
Dear shareholders, i am happy to present the annual report for the year 2012. Our traction motor remanufacturing process is second to none because nre uses todays manufacturing technology to remanufacture your motor. You find them on land vehicles, could be an electric locomotive or a milk float though you dont see many of those any more. Their maintenance used to be a cumbersome process because of the involvement of brushes and commutators. At transvaal electric motors we design and manufacture both ac mining motors and dc electric motors. A control algorithm for the torques of traction motors with individual excitation in a multiplemotor traction. Induction motors, converter control, traction, simulation introduction. 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.
Is there a difference in the way they run and why do some roads prefer one over the other. At its beginnings, it was mainly utilised in the central european mines with diffe rent means of traction being applied. Supco canada railway supply is capable to manufacture brand new traction motors and armatures that could be interchanged with emd d77d78d87d90d100 and d78d87btr traction motors and ge 761752 agah traction motors. Three phase induction motor as traction motor railelectrica. Zytek have developed a high power, compact, electric drive package comprising. Permanent magnet dc traction motor with reconfigurable. Learn more before you buy, or discover other cool products in trains.
Through our specialist motor underwriter, affinity underwriting managers, we offer specialised motor insurance products, sold in conjunction with homeowners and contents insurance cover. They arent any different in principle from other electr. Traction systems for locomotives and high speed applications. Offers low viscosity, thermal ratings up to 180c, excellent stability and is not moisture sensitive. Abb traction motors for locomotive traction motors.
Control of traction drive with motors with independent. Abb holds a complete and flexible traction motor and generator portfolio that allows us to build the perfect solution for train operators regardless of train type, power range or geographical location. At nre, locomotive components are repaired, upgraded or completely remanufactured to the original manufacturers specifications. Nothing stated in this brief is an official viewpoint of the us department of energy or any other official us government entity. Initially dc series motors were used because of the traction advantage they offered, i. In ac emumemu, traction motor type 4601 azbzbybx manufactured by bhel is used. An interactive traction motors design and selection software.
Abbs locomotive motors with welded stator frame cover the whole range of freight, passenger and multipurpose locomotives. Traction motors in diesel locomotives ee publishers. May 12, 20 right from the introduction of electric traction, there was a strong desire to use three phases induction motor for traction application. 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. In the case of small motors, deep groove ball bearings may also be used. I would also like to take this opportunity to welcome mr. Its one designed for moving things under their own propulsion.
In addition, only a fraction of the windings are active at any given instant this creates a more severe heating problem less copper to carry the current and also imposes a minimum speed requirement motor needs to turn fast enough that the active winding doesnt overheat. In deep and trustful partnerships with vehicle builders, refurbishers, and rail operators, we supply stateoftheart traction systems. Traction motors are used in electrically powered rail vehicles such as electric multiple units and electric locomotives. Because ac motors operate at approximately the frequency of the current, the drives must adjust the frequency so that the motors can have a speed range of zero to maximum rpm. Ac traction motors trains magazine trains news wire. We will be operating emergency cover for breakdowns etc and can. Our complete dedication to our customer requirements of reduced down time, is achieved by speed of service and engineering excellence. The basic arrangement of the final drive gear system of domestic main line diesel electric locomotives has remained unchanged over the years. The grounds for variations in individual exciters of each traction drive for load balancing in a multiplemotor collector electric drive are given. Included in multiple ul recognized insulation systems. We tailor every motor according to specification with regard to e. These traction motors are made in strict compliance to oem specifications and being used widely by first class railroads. Traction finance belfast contract hire, leasing, finance. A control algorithm for the torques of traction motors with individual excitation in a multiple.
May 29, 2010 the grounds for variations in individual exciters of each traction drive for load balancing in a multiplemotor collector electric drive are given. Sep 19, 2007 ac traction for locomotives is a major improvement over the old dc systems. The traction motor is suitable for a range of vehicle applications, from medium size passenger cars to light duty commercial vehicles. Electric drives manufacturer, including synchronous traction motors for electrical or dieselelectrical locomotives, multiple units, trams and working vehicle with main and auxiliary operating generators and their regulating systems. Introduction the railway as a means of transport is a very old idea.
This could only be possible with the introduction of variable voltage variable frequency control. A traction motor is used to make rotation torque on a machine. Traction motor is one of the most important equipment of ac emumemu. Dc traction motors run on ac since early ac systems were low frequency, it was quite practical to run dc motors on. Traction motor simple english wikipedia, the free encyclopedia. Thyristors in railway traction how can their effects be measured. In just simple terms, the biggest two advantages of ac traction motors over dc traction motors are. A merican t raction s ystems electric propulsion controls and accessories. Ac77 ac torque motor features mechanically compatible with the d77 motor, the a77 fits in same pedestal position in the locomotive truck bogie. Shell tmh locomotive gear grease is specifically designed to lubricate the traction motor gear cases of all locomotives including the newest, high horsepower per axle units. I have read articles in trains about both but i still dont understand. Industrial acdc motor components traction motor service.
A traction motor is an electric motor used for propulsion of a vehicle, such as locomotives or electric roadway vehicle. Our range of ac mining motors specifically for but not limited to coal mining machines. Apr 08, 2014 initially dc series motors were used because of the traction advantage they offered, i. The primary advantages of ac traction are adhesion levels up to 100% greater than dc and much higher reliability and reduced maintenance requirements of ac traction motors. Bearings for traction motors in all traction motors for electric locomotives and electric cars are used roller bearings, and they are usually cylindrical ones because of their highspeed and heavyload capabilities as well as easy assembly and disassembly.
Dc is still widely used for suburban and commuter railways. Putting horsepower to the ground tractor traction some folks may look at a vintage tractor and assume that, because it has massive lugs on the rear tires and is mostly cast iron or heavy steel, it shouldnt need more weight to get the necessary traction. A mathematical description of the relations of torques, armature currents, and excitation currents of traction motors is presented. These give you limited speed ranges since you cant vary the frequency of the power, they accelerate you up to a fixed speed and then hold the train at that speed. During this same time period, the ratings of these locomotives and demands on the gear train have increased considerably.
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