Electric traction mcqs answers pdf electrical engineering. A railway electrification system supplies electric power to railway trains and trams without an onboard prime mover or local fuel supply. A traction system that doesnt use electrical energy for the movement of vehicle at any stage is referred as nonelectric traction system. The motors used in electric traction have a very high starting torque. Here power is applied to the vehicle from an overhead wire suspended above the track. In general, diesel, steam and electric based traction systems are covered under traction systems. What is an electric locomotive systems and their types in. System of electric traction mechanics of train movement. Which of the following is an advantage of electric traction over other methods of traction. Ac traction motors, electrification systems, and railway signalling and control. Electric traction railways electric motor components. Comparison criteria for electric traction system using zsourcequasi zsource inverter and conventional architectures. Thirdrail systems are predominantly in the 600750 volt range.
Traction power system, disturbances, grid, unbalanced, power electronics, ac feeding systems. Information on further sensors, which work in the systems, can be found in selfstudy programme. Although cophase traction power supply is more advantageous, its development is somehow limited by the high operation voltage and initial cost of the compensator. Traction systems broadly speaking, all traction systems may be classified into two categories. This ppt helps to understand the concept of electric traction slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising.
Electric traction means using the electric power for traction system i. The various systems usually make use of the same types of sensor. Ppt electric traction system powerpoint presentation. Manufacture of components for drive systems, such as. Dieselelectric drive battery electric driver and straight electric drive. This book is a reproduction of that original, which has been scanned and cleaned by stateoftheart publishing tools. In deep and trustful partnerships with vehicle builders, refurbishers, and rail operators, we supply stateoftheart traction systems. Pdf electric drives of traction rolling stocks with ac. Hybrid traction systems of lithiumion batteries with fuel cells or diesel engines are the one of. Course is helpful for various competitive exams like engineering entrance, pgecet, psu recruitments, ecet, leet etc. One of the major application of an electric drive is to transport men and materials from one place to another.
If you continue browsing the site, you agree to the use of cookies on this website. May 22, 2016 electric traction means using the electric power for traction system i. Hybrid regenerative system on power electronic transformer for. Electric traction alternating current electric power. Among the different types of rolling stocks, electric traction systems are most commonly utilized for railways. The paper considers the variation of circuit design of the electric drives in traction rolling stocks when traditional dc electric machines are replaced with ac electric machines. There are many other voltage systems used for railway electrification systems around the world, and the list of current systems for electric rail traction covers both standard voltage and nonstandard voltage systems. This chapter presents a general description of the elements that characterize a railway electric transportation systems. Pdf the objective of this paper is initially to present a basic modeling of the railway traction system. Electric traction rail transport alternating current. Traction system for urban, suburban and main line transport developed over the period are at 750v dc, 1500v dc, 25kv ac, 2x25kv and 50kv ac. This article explains about electric traction systems and their. Jul 31, 2014 2 what are the advantages and disadvantages of electric traction system. Nov 30, 2015 this traction power can be diesel, steam or electric power.
Types of traction systems electrictraction systems can be broadly divided into those using alternating current and those using direct current. There are various system of electric traction existing such as electric train, trolley buses, dieselelectric vehicles and gas turbine electric vehicles. Electric traction system requirements, terms, advantages. Analysis of electric powers parameters in supplying of. Traction systems for locomotives and high speed applications. Electrical traction systems are the most energy efficient traction systems in the railway sector. Many traction systems have been developed over the period depending on dominant technologies at that time and traffic demand. Selection of traction system voltages railelectrica. May 19, 2016 the traction system which uses the electricity at some stage is called as electric traction systems. In ohe, or overhead electrification systems, the supply of electricity is through an overhead system of suspended cables known as. Urbanization coupled with technological developments are the major drivers of the electric traction systems market globally.
By electric traction is meant locomotion in which the driving or tractive force is obtained from electric motors it is used in electric trains,tramcars,trolly buses and dieselelectric vehicles etc. The traction motor is suitable for a range of vehicle applications, from medium size passenger cars to light duty commercial vehicles. In general following electric traction systems exist. With direct current, the most popular line voltages for overhead wire supply systems have been 1,500 and 3,000. We encourage you to write your suggestions, comments, and feedback about this article or project ideas in the comment section given below, and also expect your suggestions to reduce the short circuits accidents in the traction systems. Impacts of the traction vehicle equipped by threephase induction. It has great passenger carrying capacity at higher speed. These systems of tractions may be classified broadly into groups namely. 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. Hybrids traction systems whats in store for the future of. By electric traction is meant locomotion in which the driving or tractive force is obtained from electric motors. Electric railways use either electric locomotives hauling passengers or freight in separate cars or electric multiple units passenger cars with their own motors. By electric traction is meant locomotion in which the driving or tractive force is obtained from electric motors it is used in electric trains,tramcars,trolly buses and diesel electric vehicles etc. Spun off from hydroquebec in 1998, tm4 pioneered the electric propulsion system.
Rajput this book on utilisation of electrical power including electrical drives and electric traction has been written for students preparing for b. Electric traction systems are various electrical systems that are used to drive railways. By using regenerative brakes, the traction motor acts as a generator and converts kinetic energy back to electrical energy. The track electrification refers to the type of source supply system that is used while powering the electric locomotive systems. Traction system employed in locomotives can be electric or non electric. Hybrid traction technologies with energy storage devices for.
Analysis of electric powers parameters in supplying of railway electric traction systems ioan baciu corina daniela cunlan gabriel nicolae popa anca iordan electrical engineering and industrial informatics department polytechnic university of timisoara revoluniei str. Railway electrification as a means of traction emerged at the end of the nineteenth century, although experiments in electric rail have been traced back to the midnineteenth century. Abb is the expert for traction converters, motors, transformers, and complete traction chain solutions. Compliance with the limits stipulated in specific standards and. Optimising power management strategies for railway traction. Multiple drive systems per vehicle can be supported due to the safety case and levels of torque integrity employed. Electric traction systems are most commonly seen in propulsion of railway vehicles. Speed time, distance time and simplified speedtime curves, attractive effort for acceleration and. It consists of nine chapters in all, covering the various topics systematically and exhaustively. Electric traction systems and their advantages electronics hub. Electric traction systems may be broadly categorized as those operating on. Electric traction systems market global industry analysis. Ac voltage is converted into dc voltage by using a rectifier. On the basis of type, the market for electric traction systems has been segmented in the report into electric traction transformer, electric traction motor, electric traction generator, electric traction inverter, electric traction converters, and others.
Pdf traction system for electric vehicles using a variable. Electric traction railways free download as powerpoint presentation. Electric traction supply system on indian railways. The permissible range of voltages allowed for the standardised voltages is as stated in standards bs en 50163 and iec 60850. Optimising power management strategies for railway. Energysaving technology for railway traction systems using onboard storage batteries 3 company, hitachi started developing a series hybrid drive system in 2001 that combined a diesel engine and lithiumion batteries with the aim of reducing the fuel consumption and harmful exhaust emissions of. A traction system that doesnt use electrical energy for the movement of vehicle at any stage is referred as non electric traction system.
Traction systems all traction systems may be classified into two categories. Electric traction the system which use electrical power for traction system i. Energysaving technology for railway traction systems using. There are many advantages of electric traction over other forms of locomotion. Sep 29, 2009 this ppt helps to understand the concept of electric traction slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Diesel electric drive battery electric driver and straight electric drive. Hence, it is possible to achieve higher acceleration of 1. Electricity is typically generated in large and relatively efficient generating stations. Electric traction system engineering seminar topics. With direct current, the most popular line voltages for overhead wire supply systems have. Traction transformation 15 inductances and the external circuits capacitors, a resonant llc circuit is created l r, l m and c r as shown in 5.
Jr groups renew maximum speed records for their trial shinkansen. Electric traction has many advantages as compared to other nonelectrical systems of traction including steam traction. Electric traction will continue to play a dominant role in the railway since it is an environmentally clean technology compared to diesel traction and also its running cost is low. A novel electric traction power supply system using hybrid. There may be two types of traction classifications on the basis of power supply. Pdf threephase induction motors are widely used in electric traction systems. Apr 15, 2019 course is helpful for various competitive exams like engineering entrance, pgecet, psu recruitments, ecet, leet etc. Energysaving technology for railway traction systems. Consequently, most of the new technologies are focused on reducing the traction related energy consumption, for instance, adopting electrical traction systems.
Electric traction systems market size share growth outlook. Pdf comparison criteria for electric traction system. Thomas davenport, in brandon, vermont, erected a circular model railroad on which ran batterypowered locomotives or locomotives running on batterypowered rails in 1834. Electric traction mcqs answers pdf electrical engineering multiple choice questions answers. Jun 27, 20 electric traction will continue to play a dominant role in the railway since it is an environmentally clean technology compared to diesel traction and also its running cost is low. Electric traction has many advantages as compared to other non electrical systems of traction including steam traction. The steam engine drive is the best example of a non electric traction system and it is the first locomotive system used before the invention of actual electric traction systems. Federal transit administration december 9, 2016 8 new insulators that can be removed for cleaning and then reinstalled. The locomotion in which the driving force is obtained from electric motor is called the electric traction system. Now a day, magnetic traction is also used for bullet trains. Pdf basic modeling for electric traction systems under uncertainty.
A book for students, electrical and mechanical engineers, superintendents of motive power and others by edward parris burch, first published in 1911, is a rare manuscript, the original residing in one of the great libraries of the world. As a major supplier of traction systems, abb works with most. Pdf power quality analysis in electric traction system with three. Power electronics technologies for railway traction systems. Advantages of ac traction systems it is possible to use regenerative braking in electric traction system. The traction system which uses the electricity at some stage is called as electric traction systems. Chapters on electrical drives and electric traction. Scribd is the worlds largest social reading and publishing site. The traction system can be classified as nonelectric and electric traction systems.
Current situation and prospects of electric traction systems used in. Current situation and prospects of electric traction. The traction system which does not use the electricity at any stage is called as non electric traction system. Direct current dc traction units use direct current drawn from a third rail, fourth rail, groundlevel power supply or an overhead line. Wide outputregulation range reduction of switching losses on the primary side through zero voltage switching zvs over the entire load range. Electric traction completed course by nikhil nakka youtube. Traction power electrification system investigation report washington metropolitan area transit authority. The chapters dealing with the traction control and assist systems are therefore preceded by a brief chapter co ncerning the manner in which certain new sensors function. Traction power electrification system investigation wmata.
Optimising power management strategies for railway traction systems by shaofeng lu a thesis submitted to the university of birmingham for the degree of doctor of philosophy school of electronic, electrical and computer engineering college of engineering and physical sciences the university of birmingham, uk october 2011. A plethora of systems emerged in the first twenty years of the twentieth century. One of the main reasons for this is the availability of regenerative braking systems. Ppt electric traction system powerpoint presentation free. What is an electric locomotive systems and their types in india. Electric traction motors segment to register moderate growth but retain dominant.
It is used in electric trains, tramcars, trolley buses and diesel electric vehicles etc. Power electronics technologies for railway traction systems 307 the east japan railway company is developing a nextgeneration rolling stock control system for the experimental series 209 the multipurpose experimental train muetrain. Electric traction systems market size share growth outlook 2025. The system which use electrical power for traction system i.
Also get details of the dc traction systems, ac systems, composite systems etc. Under the scope of this report, electric traction systems are covered. Traction system for electric vehicles using a variable frequency threephase induction motor driver with regenerative braking. The drive which uses the electric power for moving forward, such type of drive is called an electric traction drive.
Pdf comparison criteria for electric traction system using. Oct 7 general 14390 views 2 comments on explain different types of traction system. Vvvf inverter and delivery of it to tokyu electric railway co. Traction means drawing or pulling something over a surface. Hybrids traction systems whats in store for the future. Abb supplies complete traction systems that power many of the worlds highspeed trains including the traction transformers, traction converters and traction motors, as well as the auxiliary converters that distribute the power to the trains onboard applications. Utilization of electrical enrgy and electric traction.