Special features of traction motors pdf

Agni motors have been tried and tested around the world in a huge number of realworld applications. Development of traction drive motors for the toyota hybrid system munehiro kamiya toyota motor corporation developed in 2005 a new hybrid system for a large suv. Application note modular traction motors for railway applications abb is a global leader in power and automation technologies that enable utility and industry customers to improve their performance while lowering environmental impact. An electric motor is an electrical machine that converts electrical energy into mechanical energy.

This works well until the back emf balances the emf and the locomotive will not go any faster. In addition, the motor cars are designed as end and intermediate cars, even motor cars with reduced traction are available. Three phase induction motor as traction motor railelectrica. The traction the traction motor features a new electrical design, optimized for high energy efficiency and a competitive performance. A right current developments in the field of traction motors. Explosionproof for hazardous locations washdown enclosures for food processing metric mounting for replacement of motors built to iec standards permanent magnet motors with a builtin precision dc tachometer right angle and parallel shaft. The traction motors provide propulsion power to the wheels. Traction motors are used in electrically powered rail vehicles such as electric multiple units and electric locomotives.

However, kia makes no guarantees or warranties, either expressed or implied, with respect to the accuracy of the content presented. Find your traction motor easily amongst the 116 products from the leading brands leroy somer, parker, crrc yongji electric co. Train braking c t lin cruceanu university politehnica of bucharest romania 1. Simple speed control a traction motor speed control should be easy and simple such that motor can be easily start and stop. Electric motor design of general motors chevrolet bolt. How do traction motors work in electric locomotives. Electric traction rotating electrical machines for rail. Desirable characteristics of ideal traction motors. The system which use electrical power for traction system i. Included in multiple ul recognized insulation systems. The stator is a permanent magnet, so the motor is smaller in size.

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. Small disturbances occur when train crosses the section insulators and cross over. They operate reliably even under high levels of dust and vibration, as is often the case in aggressive environments found in process industries. Ac traction, the power of hsp46 110 mph top speed, hhspsp 4466. Zytek have developed a high power, compact, electric drive package comprising. State any four desirable characteristics of ideal traction. Special features ac traction inverter hep electronic fuel injection fastbrake system. Electric propulsion controls and accessories a 77 a torque. May 12, 20 selection of suspension arrangement of traction motors. The pancake construction uses an axial magnetic field to achieve the short flat. This achieved by varying the single phase 25kv ac voltage through on load tap changer, rectification, smoothing and applied to traction motor. Rotates a number of degrees with each electric pulse.

General requirement of traction motor drives request pdf. As explain by aniruddha, traction motors work like any other electric motor. The traction motor is powered by a converter feeding the motor with voltage and frequency. Dc traction motors dc motors are used in a serieswound configuration and speed is controlled by switching series resistance in and out of the circuit. View pdf catalogues and other online documentation prices are pretax. So transition occurs and the traction motors stay in series but the trucks connect in parallel. Consisting of heavy wire wound inside of the motors case known as the field windings and wire wound around the motors inner shaft called the armature, the electric power is transported between the two elements through brushes. In most cases the linear motor can be considered as a conventional rotary motor with both the stator and the rotor split and rolled out flat. The pancake disc shape and extreme overall compactness of the agni design makes our motor generator easy to package and ideal for installation where space is at a premium. Review of existing electric traction systems in india. This is why most traction and servo motors have been dc machines. A key design feature is that the rotor cage is made of alumi num, diecast directly into the rotor lami nations without the presence of any sol dered interfaces. Due to its compact design, the zatop is ideally suited for use in elevators with or.

Kia makes reasonable efforts to ensure that information contained in its press releases is accurate at the time of posting. F1 cylindrical roller bearings for traction motors to din 43283 m1 solid brass cage, with riveted crosspieces, guided by rolling elements tvp, tvp2 solid window cage made from polyamide other designs and sizes available by agreement all bearing arrangements are also currentinsulated fag bearing types and designs for traction motors. Abb operates in more than 100 countries and has offices in 87 of those countries to give its global. Sinusoidally fed permanent magnet synchronous motors pmsm fulfill the special features required for traction motors to be applied in electric vehicles ev. Electric motors used in such applications must meet two main requirements, i. The project was initiated in 2007, not only to create a traction motor with universal appeal to train builders, but also to enable effective engineering, supply and production processes, and to maintain abbs lead as an independent supplier of traction motors.

Electric drives special purpose motors description and. Traction transformers are critical components in the traction chain, affecting both train performance and operator services. Traction transformers special application transformers abb. Special features of traction motor, methods of electric brakingplugging rheostatic braking and regenerative braking, mechanics of. The printed circuit motor is an example of an ironless or coreless motor with several unique features. Model mp54ac emissions us epa tier 4 power 4,026 kw 5,400 hp gross 3,425 kw 4,600 hp.

We are leading manufacturer of generalpurpose brushless dc bldc motors with power range from 200w to 20kw, and the voltage range from 24v to 120v dc. The general features of the electric motors used for traction purpose are. High starting torque a traction motor must have high starting torque. Differences between traction motors and industrial motors are discussed. Utilization of electrical energy pdf notes uee pdf notes. Siemens electric motors simotics drive technology siemens.

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. Brushless motors, bldc motor, sensorless motor, motor. One of the major application of an electric drive is to transport men and materials from one place to another. The track electrification refers to the type of source supply system that is used while powering the electric locomotive systems. Emd went to alternator transition starting with the 50series, ge with the dash8s. Small disturbance in supply traction motor should handle small disturbance in supply.

The rugged simotics severe duty lowvoltage induction motors represent optimized performance and sport a wealth of digital features. Transition was never in the traction motor but in the way traction motors are connected. When purchasing a motor, its often asked which technology is better, ac or dc, but the fact is that it is application and cost dependent. Contact verified traction motor manufacturers, traction motor suppliers, traction motor exporters wholesalers, producers, retailers and traders in india. For example, motors for driving rail vehicles were, until recently, exclusively dc machines. Application note modular traction motors for railway applications. Special features of traction motor, methods of electric brakingplugging rheostatic braking and regenerative braking. Development of traction drive motors for the toyota hybrid. General requirements of traction motors traction system. Find here information of traction motor selling companies for your buy requirements. Massachusetts institute of technology 1 introduction this is a concept paper in response to the foa. A traction motor is used to make rotation torque on a machine.

Both alternating current and direct current dc electric motors have been used as traction motor designs on a vast array of machines, with the most successful design using the ac motor. An induction motor works as a generator if mechanical speed is more than the synchronous speed. Most electric motors operate through the interaction between the motor s magnetic field and electric current in a wire winding to generate force in the form of torque applied on the motor s shaft. 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. This configuration can be offered as new or as a tier 4 repower to existing mpxpress locomotives. Pdf the preliminary choice of electric traction motors for. 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. Classification of electric motors electrical knowhow.

The power of mp54ac ac traction a wabtec corporation. Series commutator motor, therefore it requires regular maintenance. Transverse movement is limited by the flanges of axle suspension bearing. The preliminary choice of electric traction motors for a helicopter traction drive technical report pdf available march 2015 with 1,537 reads how we measure reads. Jul 11, 2019 apart from the four basic types of motor mentioned above, there are several types of special electrical motors like linear induction motorlim, stepper motor, servo motor etc with special features that has been developed according to the needs of the industry or for a particular particular gadget like the use of hysteresis motor in hand.

Massachusetts institute of technology 1 introduction this is a concept paper in response to the foa entitled rare earth alternatives in critical technologies. In early applications, resistance was controlled manually by the driver, but relay systems were later installed to do this automatically. During the electrical design of traction motors it is essential to optimally match the motor and converter. Apr 09, 2018 in electrical systems transformers are aptly named components that do exactly what their name implies. Introduction train braking is a very complex process, specific to rail vehicles and of great importance by the essential contribution on the safety of the traffic. Traction pivot traction motors geb15, ac w individual axle control air compressor wabco cmcblat3 cyl, air cooled.

What is electricity, drift velocity and electric current. Except for traction motors the travel of the motor armature is usually quite short. It is a forced ventilated machine arranged for axle mounting on sleeve bearing. Apr 23, 2020 the official name for the motor that powers escalators, electric automobiles and even clotheswashing machines is a traction motor. Abb supplies traction transformers for all applications. This chapter presents the general requirement of traction motor drives. May 05, 2016 focus on the different types of motors used in industry. Dc motors with special features are available from stock for special applications. Each motor drives a small gear, which meshes with a larger gear on the axle shaft. Products for railway applications schaeffler group. A traction motor must be mechanically strong and robust and it should be capable of.

Permanent magnet dc traction motor with reconfigurable. Further, they fulfill the highest efficiency classes. Fag bearing types and designs for traction motors plasma spraying method j20b j20a j20aa 7 bearing arrangements for drive units traction motor bearing arrangements currentinsulated bearings for traction motors from european manufacturers the oxide ceramic is applied to the bearing surfaces using the plasma spraying method. As a result of all these design features, the chevrolet bolt bev electric motor is able to meet the gm stringent noise and vibration requirements without implementing rotor skew, which rotor skew lowers motor performance and adds complexity to. The drive which uses the electric power for moving forward, such type of drive is called an electric traction drive. 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. Reengineering of stators of three phase traction motors type 6fra multiple choice question on basic concept of science class x. 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.

Ac77 ac torque motor features mechanically compatible with the d77 motor, the a77 fits in same pedestal position in the locomotive truck bogie. Electric traction mcq with explanation objective type. Permanent magnet excited gearless drive for traction sheave cable elevators. In series each traction motor receives 14 or 16 of the voltage and all of the amperage. What is common to all the members of this family is that the basic physical process involved in their operation is the conversion of electromagnetic energy. Electric drives special purpose motors description and applications. Adding further to your knowledge, there are two types of motor with used in electric traction in india i. This is the most important feature of traction motor provides opportunity for saving on energy but also smoothness in braking, saving on wear and tear in mechanical braking system. The traction motor is suitable for a range of vehicle applications, from medium size passenger cars to light duty commercial vehicles. A traction motor must be mechanically strong and robust and it should be capable of withstanding severe mechanical vibrations. A traction motor is an electric motor used to drive a piece of machinery. The motors covered by this part are classified as follows. The same electromagnetic forces apply and these have been employed in similar classes of ac and dc machines. It is therefore used in starter motors of cars and elevator motors p.

Features mechanically compatible with the d77 motor, the a77 fits in same pedestal position in the locomotive truck bogie. They transform power in some way to make it fit the requirements of a circuit and or its end use of power. Electrical motor types classification and history of motor. Among them, axial flux permanent magnet afpm synchronous motors are especially suited for inwheel applications. In electrical systems transformers are aptly named components that do exactly what their name implies. Field is varied by resistance insertion in parallel to field though shunting contactor in 3 to 4 steps in wag7 and wap4 locos respectively. Sd70ms dont have traction motor transition, they have alternator transition. Multiple drive systems per vehicle can be supported due to the safety case and levels of torque integrity employed. So, motor should be such that regenerative braking can be easily used in it.

My original aim was to bridge the gap between specialist textbooks which are pitched at a level too academic for the average user and the more prosaic handbooks, which are full of useful detail but provide. 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. A traction motor is an electric motor used for propulsion of a vehicle, such as locomotives or electric roadway vehicle. An igbt based ac traction system is included with individual axle control, brushless ac motors and a synchronous alternator to minimize maintenance impact. Main generator ge 5gmg211 traction w integrated hep winding, single bearing hsp46 speci. Download uee notes pdf 6 unit vii electric traction ii mechanics of train movement.