In deep and trustful partnerships with vehicle builders, refurbishers, and rail operators, we supply stateoftheart traction systems. In 1899, another vehicle which could run either on or off rails was demonstrated in berlin. Requirements, ac and dc drives, modern trends in drives technology, characteristics of dc. An ac traction system has become very popular nowadays, and it is more often used in most of the traction systems due to several advantages, such as quick availability and generation of ac that can be easily stepped up or down, easy controlling of ac motors, less number of substations requirement, and the presence of light overhead catenaries that transfer low.
Guidelines for repairrehabilitation of ac traction motors. Ac traction motor actm integrated starter generator isg. Also, the heat is largely produced by internal elements of the dc motor, so most dc motors have a fan to reduce temperature. More than 90,000 motors are in use in a variety of rail vehicles, from trams to highspeed trains to powerful locomotives. The results of this work may help in enhancing the main criteria for optimising the safe and sustainable operation of electric railway traction systems. The curtis model ac f2t integrates three separate motor controllers into a compact, rugged unit.
Total solutions for quality locomotive electrical rotating. Rpiis a leader in providing remanufacturing services to the railroad industry for electric transmission components used for both freight and passenger locomotives. In deep and trustful partnerships with vehicle builders, refurbishers, and rail operators, we supply stateoftheart traction. A gabased adaptive mechanism for sensorless vector control. The highvalue flatwire stator winding has an especially high powertoweight ratio as well as mechanical stability. Permanent magnet dc traction motor with reconfigurable. The total tractive effort in a drive is obtained from the sum of the traction motor torques, less lost torque introduced by the mechanical gearing between motors and. Novs leadership in the development of ac technology in top drives, drawworks, rotary tables, pipe handling systems, and mud pumps has led to the development of the drillforce drive systems. The traction motor used can be either a dc motor or an ac induction motor acim. Ac drives lead the technical revolution of electric forklifts.
A mechatronic approach for the detection of wheel slip. Comparing ac induction with permanent magnet motors in. The motors used are induction or asynchronous motors designed to have characteristics suitable for traction. Offering a broad scope of repair and overhaul services for ac dc traction motors, our cradle to grave oem manufacturing and life cycle management service provides the entire range of original motors to the oems specification, with options to provide lifecycle or inwarranty service and maintenance. First, at low output voltages the converter power factor is low. May 14, 2015 it is understood that to slow the ac traction motor while in dynamic braking mode, the frequency of pulses supplied by the inverter to the ac traction motor is slower than the mechanical frequency of rotor rotation due to train momentum turning the wheels and then turning the traction motor rotor. Induction and synchronous motor drives, starting, running, speed. Ac traction motor actm superior lowend torque and high powertoweight ratio fits in conventional gearbox space claim proven design, with over 12,000 operating worldwide benefits easy installation reduced maintenance reliable, low lifecycle cost electric propulsion with.
The theoretical speed of the rotor in an induction motor depends on the frequency of the ac supply and. The speed and torque of the motor are controlled by varying the frequency, voltage and current applied to the stator coils. We match our traction motors and drives perfectly to one another and to the projectspecific requirements. Ac motor controls for elevators motion control engineering. Electric traction system is tied up to only electrified routes. Matlabsimulink based model for 25 kv ac electric traction drive. Electric drives of traction rolling stocks with ac motors. Three phase primary winding is mounted on stator distributed spatially at 120 degree. The rivalry between the two threephase ac traction. Internal power supply distribution system iii energy efficient systems 4. Ac 77 ac torque motor features mechanically compatible with the d77 motor, the a77 fits in same pedestal position in the locomotive truck bogie. This experiment continued until june 1882, after which there were few developments in europe, although separate experiments were conducted in the u.
Operation analysis of ac traction motors in terms of electromagnetic torque capability on sustainable railway vehicles. With that in mind, a finite element program is used in order to compare the performance of the two types of motor designs the im and pmac motor. Motors and controllers available in commutator, induction ac motor and blpm version, voltage range from 12 v up to 80 v and power up to 18 kw. Ac induction motors how ac motors work explain that stuff. The rivalry between the two threephase ac traction electric motors, namely the induction motor and synchronous motor persists, each competing to be the safest, fastest and cheapest the two 114. One component defines the magnetic flux of the motor, the other the torque. Abb is the expert for traction converters, motors, transformers, and complete traction chain solutions. Houghton internationals risasapproved facility specialises in the repair, maintenance and life extension of electro mechanical assets into the uk and global markets, including ac and dc motor repairs offering a broad scope of repair and overhaul services for ac dc traction motors, our cradle to grave oem manufacturing and life cycle management service provides the entire range of. Those technologies have been sufficiently effective to support revenue service in. When buying a new motor be sure it is designed for ac drive applications proper winding wire insulation. Apr 21, 2020 in synchronous ac motors, the rotor turns at exactly the same speed as the rotating magnetic field. 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. Motor performance definitions gvm series motors are designed to meet the power.
Electric vehicle traction motors without rare earth magnets. Microprocessor based controllers for series wound, commutator motors. Permanent magnet dc traction motor with reconfigurable winding. A new motor can provide better performance and help reduce adjustment time hidden cost.
Efficiency is as important in drive systems for hybrid electric vehicle drive motors as it is for industrial motors in manufacturing facilities and commercial buildings. 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. Analysis of torque capability and limits of operation of ac traction. Ernst werner siemens demonstrated his elektromote in a berlin suburb.
The tractive effort of a locomotive whether ac or dc is defined by the equations. Bulucea4 1 university of craiova, faculty of electrical engineering, craiova 200440, romania 2 university of ontario institute of technology. Traction motors from siemens mobility are known for their compact design that enables the drive system to be optimized to the available space. It is built up of a number of small wedge shaped segments of high. Vector control, also called fieldoriented control foc, is a variablefrequency drive vfd control method in which the stator currents of a threephase ac or brushless dc electric motor are identified as two orthogonal components that can be visualized with a vector. Sep 19, 2007 ac traction for locomotives is a major improvement over the old dc systems. Urethral strictures 2010 free ebook download as pdf file. Traction motors traction motors and generators abb. The function of a commutator is to invert dc input wave to an ac wave in the armature winding. A mechatronic approach for the detection of wheel slipslide.
Matlabsimulink based model for 25 kv ac electric traction. 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. As described in figure 1, the traction power of the wheels is delivered by the threephase electric machine. Figure 1 represents the 5geb22 motor with cooling blower and connection box. T railway technology today 4 edited by kanji wako what. The trolleybus dates back to 29 april 1882, when dr. D87btr traction motors 2630 mac70, 2830 mac 80, 3432 mac 70 ace and geb traction motors ac rotor pinion advancement ac stator rewinding rail products international, inc. Ac motors which run at fixed speed, without slip, and are. Massachusetts institute of technology 1 introduction this is a concept paper in response to the foa entitled rare earth alternatives in critical technologies for energy react. Traction motors traction motors for apm applications output. Dm27 ac induction drilling motor innovative technology. This article discusses the basic traction systems used in today.
Abb offers a traction motor portfolio to build perfect solution for train operators regardless of train type, power range or geographical location. Designed for both ac and dc traction motor applications. Integrated dual ac traction and dc pump motor controller. Analysis of torque capability and limits of operation of. Ac traction motors have replaced dc motors in many traction applications. Curtis model ac f2d provides a dual traction only version without the dc pump control. Electric propulsion controls and accessories a 77 a torque. Traction motors in diesel locomotives ee publishers. This era created the dc traction motor largely in the form that was to continue until it was almost entirely replaced by ac motors in the 1990s. In particular the rare earth based, hard magnetic material neodymium iron boron ndfeb has offered signi. Comparing ac induction with permanent magnet motors in hybrid vehicles and the impact on the value proposition jay w. The ac f2t provides independent control of dual ac induction or pmac traction motors and control of a dc hydraulic pump motor. Three phase induction motor as traction motor railelectrica. Traction motors components and systems siemens mobility.
Variable speed system allows higher efficiency even at low speed. Ac traction vs dc traction greenville, south carolina. Traditionally, dc motors were used for traction drives, but recent advances in microcontroller technology have made them faster and powerful, resulting in easier implementation of ac motor control algorithms. Accuweather has local and international weather forecasts from the most accurate weather forecasting technology featuring up to the minute weather reports. Motors specification of electric motors marshall wolf automation. In case of ac traction the communication lines running along the track experience considerable interference from the power lines. In traction locomotive, there are two inverters and each.
Ac traction for locomotives is a major improvement over the old dc systems. 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. Proper maintenance of traction motor is vital to ensure good reliability and availability of ac emumemu. Operation analysis of ac traction motors in terms of. Traction pivot traction motors geb15, ac w individual axle control air compressor wabco cmcblat3 cyl, air cooled, motor driven brakesair wabtec fastbrake, blended w db brakesdynamic ge db grid system, extended range, blended w fastbrake cooling system 3 x 48 ac powered cooling fans hep inverter hep, igbt hep power 600 kw, 480 vac.
Figure 1 represents the 5geb22 motor with cooling blower and. Our drives and traction motors operate all over the world. Dynamic braking of ac traction motors trains magazine. Cm632uut 1500 hp performance ratings the cm632uut 1500 hp ac induction drilling motor with 3400 scfm airflow and 40 to 55 c ambient temperature range cm632uut 1500 hp performance curves torque vs speed 690v operation, tested data from 0 to 2400 rpm cm632uut 1500 and 1600 hp ac induction drilling motors cm632uut ac induction drilling motor. Pdf operation analysis of ac traction motors in terms of. Motors are oil proof on the drive end side and are adapted to standard assembly dimensions of hydraulic pumps. Comparing ac induction with permanent magnet motors in hybrid. 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. The choice of electric motor is key to the performance of an electric vehicle. Reference list of ac traction motors end user application type power qty year bls helsinki metro b ern docklands london apts eindhoven korea alstom stendal train metro train dmkt 47.
Ac traction motors modular designs brush group pdf. May 12, 20 ac induction motor is equivalent to transformer where secondary is short circuited and free to rotate. Owing to the advantages associated with ac motors, ac motor drives are fast replac ing dc motor. Energy saving technologies for railway traction motors. The torque and speed of the machine are controlled by the voltage source inverter, which converts the battery dc voltage to a threephase. Ac traction motors trains magazine trains news wire. Evolution to ac motors direct current dc traction motors were used for a long time after the development of electric railways.
The threephase asynchronous traction motor is the motor used most frequently for modern locomotive. The models of the all individual systems are integrated in to one connected system for simulation purpose. Using a new ac motor when replacing an existing ac or dc motor with a new ac motor, the following issues should be taken into consideration. Traction motors 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. Massachusetts institute of technology 1 introduction this is a concept paper in response to the foa entitled rare earth alternatives in critical technologies. Secondly, the source current with square wave shape is rich in harmonics. Introduction this publication provides basic instructions for inspection, maintenance, and overhaul procedures the drilling motor model 5geb22. Traction systems for locomotives and high speed applications. The speed and torque of the motor are controlled by varying the frequency, voltage and current applied to. This forms the source for the two voltage source inverters that supply power to six ac motors. In case of dc series motor regeneration is not simple process. Ac traction motor actm superior lowend torque and high powertoweight ratio fits in conventional gearbox space claim proven design, with over 12,000 operating worldwide benefits easy installation reduced maintenance reliable, low lifecycle cost electric propulsion with low noise and vibration weg cooled.
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