Dc traction motors pdf

Seattle sound transit, federal way link extension design 7. Pdf theoretical and practical perspectives of diesel. Theoretical and practical perspectives of diesel locomotive with dc traction motors wheelsets slipping and sliding control article pdf available in transport 264. Before the mid20th century, a single large motor was often used to drive multiple wheels through connecting rods. Peerless electric traction motors are engineered to work in a variety of battery powered vehicle applications requiring 12, 24, or 36. The railway system division, in its commitment to future progress, has consistently achieved technological breakthroughs on three systems that are shaping the future worldwide. Peerless electric low voltage dc traction motors are custom designed and quality engineered to meet todays industrial demands for more mobile and efficient material handling systems. Finally, the various machines are compared electrically, mechanically and economically. Dynamic braking of ac traction motors trains magazine. Drives general 4 motor operation with converter supply 6 motor current waveforms 6. Some of the technical discussion is based on work that has been reported in a conference publication1. Dc traction motors amre design and production since 1954.

In deep and trustful partnerships with vehicle builders, refurbishers, and rail operators, we supply stateoftheart traction systems. A prototype of a ganz ac electric locomotive in valtellina, italy, 1901. It is a forced ventilated machine arranged for axle mounting on sleeve bearing. That method is to change the terminal voltage of the motor. Better wheelslip control than dc so ideal for really heavyhaul freight also better dynamic braking, and ac traction motors can withstand abuse that would wreck dc motors. Traction motors generally represent an arduous test of brushes and brush holders because of vibration and the shock loads that the motors can receive.

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. Traction systems for locomotives and high speed applications. It offers several benefits over other systems, including quick start and stop, very efficient, pollutionfree, easy to handle and easy speed control. Electrical machines for mechatronics laboratory 7 4 speed control of series dc motors unlike with the shunt dc motor, there is only one efficient way to change the speed a series dc motor. Used for driving and steering the equipment which are powered by battery and driving oil pump, ideal for forklift of 0. This paper looks at the fundamentals of the design and construction of the main dc and ac traction motor types that will usually be encountered in the uk and discusses some of the details that need to be considered.

The dc motors are offered to perform traction, lifting and steering operations for any type of batterypowered vehicle with a voltage range from 24 up to 96v thanks to our expertise we can design and create windings of any type permanent magnets, series excitation, compounds, sepex etc and we can also offer a wide and varied range of mechanical configurations more than thousand of. The traction motor is a four pole dc series motor in which field winding is connected in series with armature. Hp duty cycle shunt wound volts dc 750 750 arm amps 1185 1435 field amps 60 60. Ac dc traction motor remanufacturing onsite vpi capabilities onsite testing equipment over 30 years experience any quantity 1 to 1,000s worldwide customer base references available swiger coil systems, llc is americas leading supplier of traction motors, traction motor remanufacturing, traction motor. Then the operation of the principal types of traction machine dc, synchronous and induction asynchronous motors is described, and their steadystate torquespeed characteristics are explained by means of electrical circuit models. Railway transportation systems for a comfortable future. Traction motor test set high power motor test systems.

Brushless dc motor design for electric traction system. Nov 30, 2015 the electric traction system is the most efficient of all other traction system such as steam and internal combustion ic engine type systems. We have test systems available for testing fractional up to 50,000 hp motors. For traction motor drive applications, the life expectancy of dc bus capacitor has been discussed in 2. For maximum motor life, the cause of overheating should be identified and eliminated. The saminco a300 series of dc or ac traction motor controllers are high performance microprocessor based, solid state drives designed specifically for the unique needs of the light rail transportation industry.

From some diagrams seen so far on the internet, it seems the ac traction motor dynamic braking resistors are connected on the dc portion of the traction. A lowinductance dc bus capacitor for high power traction. Heavy duty dc traction motors 5 75 kw series wound 48 600v supplies application drive shafts for use in nonhazardous areas,designed for the standard main drive shaft is parallel key general purpose traction duty on industrial wayed, alternative tapered or internalexternal. Dc motors are available from stock in permanent magnet. From 150 to 3000 horsepower, our rugged industrial designs may be used to power everything from a medical blood centrifuge to the printing press for your sunday newspaper. There are several different classes of motors that might be considered for use in ship propulsion, ranging from dc commutator motors through conventional induction and synchronous motors to permanent magnet synchronous machines, doubly fed machines and. The rotor and stator are each connected from a different power supply, this gives another degree of freedom for controlling the motor over the shunt. Electric traction has many advantages as compared to other nonelectrical systems of traction including steam traction. Ac traction motors have replaced dc motors in many traction applications.

At its beginnings, it was mainly utilised in the central european mines with diffe rent means of traction being applied. The speed and torque of the motor are controlled by varying the frequency, voltage and current applied to. Wabtec corporation 30 isabella street pittsburgh, pa 15212 usa phone. By electric traction is meant locomotion in which the driving or tractive force is obtained from electric motors. 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. This achieved by varying the single phase 25kv ac voltage through on load tap changer, rectification, smoothing and applied to traction motor. Comparison of ac77 ac torque motor to d77 dc motor 62. The ac alternating current drive, also known as variable frequency drive, used in locomotives is currently also being adopted in most of the new dieselelectric locomotives.

Railvolution issue 052009 first orders for abbs new range of traction motors english pdf article rail industry clean public transport experiences a revival english pdf article 14 18 on the fast track english pdf article. With a successful development of using a newly developed lowinductance highcurrent film capacitor in a high power 75 kw traction motor drive, the intention of this paper is to. Abb is the expert for traction converters, motors, transformers, and complete traction chain solutions. Seriesshunt series shunt seriesshunt series shunt hp. The speed and torque of the motor are controlled by varying the frequency, voltage and current applied to the stator coils. The system which use electrical power for traction system i. The dc bus capacitor is the most important passive component in a traction motor drive. Dc motors, installation, operation and maintenance manual. Now for dynamic braking, it is understood that dynamic braking resistors are still used to dissipate heatenergy in a similar fashion to that used for dc traction motor dynamic braking. Peerless electric traction motors are engineered to work in a variety of battery powered vehicle applications requiring 12, 24, or 36 volt dc motors with.

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. The 752 hightorque dc drilling motor with 2800 scfm airflow and temperature rise of 155 oc at 40c ambient. May 12, 20 these two equations derives all equations of dc traction motor. Dc motor principle a machine that converts dc power into mechanical energy is known as dc motor. 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. Toshiba to showcase hybriddieselbattery locomotive demonstrator at transport logistic 2019. Its operation is based on the principle that when a current carrying conductor is placed in a. Allenbradley dc motors are designed and built in accordance with safety. Pdf operation analysis of ac traction motors in terms of. 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 for energy react. Motors have brushgear which needs maintenance and is a weak point if abused. Figure 2 torquespeed curves for a separate field excitation motor. New dc drilling motors jec75yzb jec75yze jec75zf top drive type.

The stator is a permanent magnet, so the motor is smaller in size. Field is varied by resistance insertion in parallel to field though shunting contactor in 3 to 4 steps in wag7 and wap4 locos respectively. The track electrification refers to the type of source supply system that is used while powering the electric locomotive systems. The operation of this type of device dc motor is reversible if the load opposes the rotation movement the load is said to be resistive, the device provides a torque and operates as a motor if the load is such that it tends to make the device rotate the load is said to be driving or it opposes the slowdown. Speed 1armature current speed is inversely proportional to armature current. On the coldest days of winter the series motor that starts your car overcomes the extreme cold temperatures and thick lubricant to get your car going. Italian railways were the first in the world to introduce electric traction for the entire length of a mainline rather than just a short stretch. Due to its compact design, the zatop is ideally suited for use in elevators with or. Dc motors although ac motors are used in most of the cases, dc motors have many applications and used for multipurpose applications.

The tractive effort of a locomotive whether ac or dc is defined by the equations. Permanent magnet dc traction motor with reconfigurable. Series commutator motor, therefore it requires regular maintenance. The rotor and stator windings are connected in parallel. The 15 kv, 50 hz 345 kw 460 hp, 48 tonne locomotives used transformers and rotary converters to power dc traction motors. These ac motors are simpler, and more reliable than the old dc motors. Installation dc motors have characteristics which can cause serious or fatal injury unless they are selected, installed, maintained and operated by quali. Brushless dc motor design for electric traction system md. When your electric motor testing needs require complete system design and.

Dc motors, traction motors, synchronous motors, induction motors, shuntwound, compoundwound, and serieswound motors. Traction motors provide the motive force for the majority of railway vehicles. Conventional designs have been using a set of electrolytic bulk capacitors to. Basics of dc motors for electrical engineers beginners on photo. Introduction the railway as a means of transport is a very old idea. Houghton internationals risasapproved rail division 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 acdc traction motors, our cradle to grave oem manufacturing and life cycle management service provides the entire range of. Multiple drive systems per vehicle can be supported due to the safety case and levels of torque integrity employed. Traction motors used to drive trains are series motors that provide the required torque and horsepower to get massive amounts of weight moving. At its beginnings, it was mainly utilised in the central european mines with diffe rent means of traction. Delivery of leadingedge electric systems for new emus of west japan railway company. Ac traction for locomotives is a major improvement over the old dc systems. Ac traction vs dc traction greenville, south carolina. May 14, 2015 now for dynamic braking, it is understood that dynamic braking resistors are still used to dissipate heatenergy in a similar fashion to that used for dc traction motor dynamic braking.

Ac induction motors known as asynchronous traction motors. In deep and trustful partnerships with vehicle builders, refurbishers, and rail operators, we supply stateoftheart traction. Permanent magnet excited gearless drive for traction sheave cable elevators. Maintenance and troubleshooting of electric motors reliance electric posted 11005 motor maintenance scheduled routine care. Traction motors in diesel locomotives ee publishers. Operation analysis of ac traction motors in terms of electromagnetic torque capability on sustainable railway vehicles. Basics of dc motors for electrical engineers beginners. An induction motor does not require contacts inside the motor. It is used for local delivery of good in large towns with maximum daily run of 50 to 60 km. General specifications a300 controllers hp range 60hp dual motors. It is therefore used in starter motors of cars and elevator motors p. Zytek have developed a high power, compact, electric drive package comprising. The traction motor is suitable for a range of vehicle applications, from medium size passenger cars to light duty commercial vehicles.

The motors used are induction or asynchronous motors designed to have characteristics suitable for traction. It is used in electric trains, tramcars, trolley buses and dieselelectric vehicles etc. Reconditioned dc drilling motors jec75zb jec75ze jec75yzf top drive jec75zbf jec75zef type. Houghton internationals, risasapproved, rail division specialises in the repair, maintenance and life extension of electro mechanical assets into the uk and global markets, including ac and dc traction motors, alternators, generators and motor alternator sets.