Pdf utilization of electrical energy pdf notes uee. Evaluation of advantages of highspeed emus in the case of series 700 shinkansen highspeed train with igbt applied traction systems yoshiyasu hagiwara, mamoru tanaka, masayuki ueno central japan railway company, tokyo, japan 1. B ecause of the curves in the track the contact wire. Electric traction mcqs answers pdf electrical engineering. In electric traction for a trapezoidal speedtime curve. The railway traction systems under study, taking account of all the processes of. Electric traction system 2 uploaded by santosh nayak. Gtu electrical power utilization and traction semester exam previous year question paper download pdf presentation on economies of traction diesel vs electric ebook download ppt diesel vs electric traction ppt. Download pdf ebook on a first course on electrical drives by s. Traction drive system for electric vehicles, using.
Thomas davenport, in brandon, vermont, erected a circular model railroad on which ran batterypowered locomotives or locomotives running on batterypowered rails in 1834. Speed time, distance time and simplified speedtime curves, attractive effort for acceleration and propulsion, effective weight, train resistance, adhesive weight, specific energy output and consumption. Utilization of electrical energy pdf notes uee pdf notes. Electrical drives and traction pdf notes module 3 vssut. Special features of traction motor, methods of electric brakingplugging rheostatic braking and regenerative braking. Winner of the standing ovation award for best powerpoint templates from presentations magazine. Ppt electric traction powerpoint presentation free to.
Change in speed is achieved by varying the steady state motor speed torque curve so that motor torque equals the load torque at the new desired speed. But this last offered a further expansion until which one we know today. Require car speeds of 500 fpm up to 3500 fpm and levels from 15 to 120. In the figure shown below when the motor parameters are adjusted to provide speed torque curve 1, drive runs at the desired speed.
If electric supply is used for driving a locomotive, the system is known as electric traction. Electric traction railway electrification encourages rural electrification as no special transmission line has to be run for this purpose. Before power electronics became available, electric traction was largely provided by d. Evaluation of advantages of highspeed emus in the case of. Topics covered electrical drives and traction pdf notes module 3 of vssut are listed below. An assessment of the overall performance of 3es5k alternatingcurrent electric locomotives with a collector drive in the regimes of traction and recuperative braking using the concrete example of a staged route between the khabarovsk2 and bikin stations of the far east railroad is given in this article. In an electric traction system the driving force to pull a train is generated by the traction motors.
The typical speed time curve for a locomotive is shown in figure given above. From starting to the stage when locomotive attains maximum speed, the period is known as acceleration period, as the vehicle is constantly accelerated. Youll also need to decide if the goal is fuse saving or fuse clearing in order to pick settings and curves for the fast and slow curves. Electrical drives and traction notes vssut module 3. The rectangular conductor cross section is defined by its height h c and width w c, and the circular conductor by its diameter d c. Act of drawing or being drawn is known as traction. The simple resistor control was later superseded in dc traction by chopper control. Our highspeed traction elevator products are ideal for buildings with the following features and service needs. In return, the energy from the wheels turns the motor, which functions as a generator, converting energy normally wasted during coasting and braking into electricity, which is stored in a battery until needed by the electric motor. Around the world, proposals for new high speed lines are booming.
Poor power quality affects the performance, reliability of the railway system as well as having an effect on equipment attached to the local distribution network. A contact wire or contact cable actually carries the electricity. 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. There are various system of electric traction existing such as electric train, trolley buses, dieselelectric vehicles and gas turbine electric vehicles. 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. The mechanics involves conversion of overhead electrical powerdieselsteam power in rail horse power to haul a train encountering acceleration, train, grade, curve resistance and similarly braking.
Electric traction 1701 however, the steam locomotive suffers from the following disadvantages. Whatever may be source or principle of working of traction motor, all provide tractive effort characteristics to encounter. Traction motor used for traction purpose is dc series motor, separately excited dc series motor, three phase induction motor, synchronous motor and permanent magnet synchronous motor. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that. Ppt electric traction system powerpoint presentation. In ohe, or overhead electrification systems, the supply of electricity is through an overhead system of suspended cables known as the catenary. Electric braking is superior to mechanical braking because of less wear on brake shoes, wheels and track. For a given choice of electric feeding technology, this simulation method determines the delay time of a train for a speci. Speed time curves for different services trapezoidal and quadrilateral speed time curves. Review of existing electric traction systems in india. Thyristors in railway traction how can their effects be. Utilization of electric power and electric traction j b.
Utilization of electrical enrgy and electric traction. The curve drawn between speed and time is called the speedtimecurve. Speedtime curve of main line service differs from those of urban and suburban services on following account a it has longer free running. Industries such as highrise hospitality, apartments and condominiums, commercial office buildings and more. Railway traction system pdf different types of railway traction and their importance in the. If you continue browsing the site, you agree to the use of cookies on this website. Real traction and brake characteristics of a 3es5h electric. Introduction in 1964, tokaido shinkansen started the world first revenue service at high speed of over 200kmh. High speed railway capacity understanding the factors affecting capacity limits for a high speed railway by piers connor1 abstract high speed rail is the new railway. The electric traction system can be broadly divided into two groups. If you need this ebook you can download it free from here.
Electric power systems research xxx 2016 xxxxxx fig. This chapter presents a general description of the elements that characterize a railway electric transportation systems. Electric traction system requirements, terms, advantages. In case of steam traction break blocks and wheels are likely to overheat on continuous. A railway electrification system supplies electrical energy to railway. Free from smoke and flue gases hence used for underground and tubular railway. In diesel electric railways because of variable train speed, a sort of compromise is taking. Auxiliary power supply is a low voltage acdc power supply for onboard devices with an important consideration for safety equipment. The electric traction consists o f some contact wires and it is supported at intervals by droppers from a simple or composite catenary wire 6.
The curve gives the speed at various instants after the start of run directly. Intelligent traction control in electric vehicles using a novel acoustic approach for online estimation of roadtire friction. The main consideration is coordination with upstream and downstream protective devices, not so much the name used for the curves. The speedtime curve gives complete information of the moion of tt he train. The curve may be broadly split into the following periods. Operation of traction vehicles with 3f induction motors in electric railway system 25kv, 50hz the. This book is a reproduction of that original, which has been scanned and cleaned by stateoftheart. The key to optimizing the power of the engine throughout the speed range of the track in question is to maximize this area. Utilization of electric power and electric traction j b gupta pdf. The main advantage of this kind of topology is that it can generate almost perfect current or voltage waveforms. Pdf intelligent traction control in electric vehicles. Speed time curves for different services trapezoidal and quadrilateral.
Speed time, distance time and simplified speed time curves, attractive effort for acceleration and propulsion, effective weight, train resistance, adhesive weight, specific energy output and consumption. Modern heat extraction systems for electrical machines a. The permissible range of voltages allowed for the standardised voltages is as stated in standards bs en 50163 and iec 60850. System of electric traction mechanics of train movement. 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. Slop of the curve at any point gives the acceleration at the corresponding instant or speed. Download uee notes pdf 6 unit vii electric traction ii. What is an electric locomotive systems and their types in. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. Full text of speedtime curve study of electric railway load conditions. Among these curves, the speedtime curve is generally is used. Traction drive system for electric vehicles, using multilevel converters juan w.