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. Working principle of three phase induction motor ac induction motor. A traction motor is used to make rotation torque on a machine. Single phase 25 kv is stepped down and converted in to dc, then this dc supply is used to run dc traction motors equipped in conventional locos. The system of working is set based on the primitive design of locomotive. The traction motor tao659 has the following main parts. Traction motors are used in electrically powered rail vehicles such as electric multiple units and electric locomotives. Preface the 5th edition of basic electrical installation work has been completely rewritten in 14 chapters to closely match the 14 outcomes of the city and guilds quali. As of september 2015, one million cumulative electric vehicles were sold globally.
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. Hiroshi hata evolution to ac motors direct current dc traction motors were used for a long time after the development of electric railways. Methods of electrialc heating resistance, arc, induction and dielectric heating. An electric car simply consists of three main components battery, controller and electric motor. The reference text on which this subcourse is based is a broad presentation of locomotive structure and a basic outline of maintenance.
Electric locomotives, though high on electrical engineering, work on the single principle of drawing current from external sources and then after sufficiently modifying it, feed it to the traction motors. Sahebpreet singh chatha on electromagnetic flow meters working principle. They are also used in electric vehicles, such as electric. Electric traction means using the electric power for traction system i. The diesel and electric locomotive story and working 24. John deere unveils latest allelectric tractor prototype. But the speed of rotation of an electrical machine can be controlled precisely also by implementing the concept of drive the main advantage of this concept is, the motion control. In ohe, or overhead electrification systems, the supply of electricity is through an overhead system of suspended cables known as. All heating requirements in domestic purposes such as cooking, room heater, immersion water heaters, and. It is used for local delivery of good in large towns with maximum daily run of 50 to 60 km.
Railway technology today 4 edited by kanji wako what drives electric multiple units. Introduction of traction system in hindi, electrical. For electric traction, basic fuel is still coal only. Electricity means that a battery sometimes assisted by ultracaps is used to store the energy, and that an electromotor from now on called motor will be used as traction motor. This could only be possible with the introduction of variable voltage variable frequency control. Appendix d suggestions from various electric loco sheds 42 distribution list 43. The technical content has been revised and updated to the requirements of the new 17th edition of the iee regulations bs 7671. The track electrification refers to the type of source supply system that is used while powering the electric locomotive systems.
Now a day, magnetic traction is also used for bullet trains. Adding further to your knowledge, there are two types of motor with used in electric traction in india i. The vehicle uses a large traction battery pack to power the electric motor and must be plugged into a charging station or wall outlet to charge. Pdf this paper provide an overview of the recent work of electric vehicle in the region. Ac series motor principle, types, characteristics and. 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.
More electric vehicle models are sold in more markets, and electric vehicle sales globally continue to rise. By using lead acid batteries, the weight of the car increases a lot pounds. Introduction to basic notions on electric power 5 electric current conductor lines of force fig. Electric locomotives, be it a standalone unit or the powercars of an emu trainset, work on the single principle of drawing current from external sources and then after sufficiently modifying it feed it to the traction motors which turn the wheels. Of course, the working principle of the ac motor doesnt differ a lot than the dc motor, but its able to run on both ac. The permissible range of voltages allowed for the standardised voltages is as stated in standards bs en 50163 and iec 60850. The final decade of the 20 th century and the first decade of the 21 st century were marked by the enormous rise in high speed due to the huge leaps forward in electric locomotive technology. Electric vehicle components and working principle allelectric vehicles evs have an electric motor instead of an internal combustion engine. Energy storage and electric generation in diesel electric locomotives conference paper pdf available july 2009 with 1,994 reads how we measure reads. Electric drives and traction interview questions 1. To obtain desirable characteristics the torque requirement from the vehicle is same. Three phase induction motor as traction motor railelectrica. As it was at the time not feasible to step down dc voltages onboard the train, transmission between the substation and the train had to be at a low voltage between 750 v and 3,000 v so.
The moscow odessa train in vinnytsia railway station. Principles for effective electric vehicle incentive design. That includes large tractors for agriculture, as demonstrated by. It would not be wrong to say that diesel locomotives actually run on electric power, which is why locomotives using this technique of operation are called dieselelectric, which includes all mainline diesel locomotives in india.
If electric supply is used for driving a locomotive, the system is known as electric traction. As explain by aniruddha, traction motors work like any other electric motor. In ohe, or overhead electrification systems, the supply of electricity is through an overhead system of suspended cables known as the catenary. Because it runs on electricity, the vehicle emits no. As told earlier, the battery used for this car is very expensive. The siemens es64u4, is the current confirmed holder as the fastest electric locomotive at 357 kmh 222 mph in 2006. Act of drawing or being drawn is known as traction.
In the early days of electric railways, dc was the most common power supply. The direction of the lines of force is given by the law of the screwdriver. But this last offered a further expansion until which one we know today. Electric traction 1701 however, the steam locomotive suffers from the following disadvantages. Unlike steam and diesel locomotives, electric locomotives do not carry their fuel on b. Friends is video me ham electric traction ke bare me discuss kar rhe hai. Dieselelectric locomotives introduction an understanding of the structure of a locomotive mechanically and electrically is essential to a person attempting to perform maintenance and repair services on it. Knowledge of electric traction systmes working principle, calculations methods, dimensioning and their enivormental impact. Some of the technical discussion is based on work that has been reported in a conference publication1. Allelectric vehicles evs have an electric motor instead of an internal combustion engine. 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. Thedevicecanbethoughtofas a controlled current source, which provides any kind of current waveform in real time. However, the motors have different characteristics such as method of operation, rating, size, variation in speed and working principle.
Electric and magnetic fields below the contact line in the vicinity of electric traction. However, since the 1980s, they have been replaced by alternating current ac motors, one type of. 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. Because it runs on electricity, the vehicle emits no exhaust from a tailpipe and does not contain the typical liquid fuel. T railway technology today 4 edited by kanji wako what. 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. The vehicle uses a large traction battery pack to power the electric motor and must be plugged in to a charging station or wall outlet to charge.
The system which use electrical power for traction system i. Nowadays buildings are constructed to greater heights and with the invention of traction electric elevators they are commonly used in such buildings. Right from the introduction of electric traction, there was a strong desire to use three phases induction motor for traction application. Active filtering working principle harmonic current source powernac active filter result activefilteringprinciple active filters are power electronic devices connected in parallel with the load to be compensated. Top speed, smooth ride quality and better elevation are the basic characteristics of these elevators. How do traction motors work in electric locomotives. Introduction electric vehicles continue to gain traction in the marketplace. Electric traction means use of the electricity for all the over machines. Electric traction means by means of the electric power for traction system i.
An electric locomotive is a locomotive powered by electricity from overhead lines, a third rail or onboard energy storage such as a. At electrek, we firmly believe that all forms of ground transport will start to transition to electric propulsion relatively soon. A hybrid electric vehicle hev has two types of energy storage units, electricity and fuel. Covering technologies used and their use in indian railway.
802 1022 769 1261 112 905 796 566 1255 684 574 636 628 108 1369 1145 1326 869 1564 713 475 1072 398 1229 1403 680 1647 1037 1207 623 743 920 1560 1339 815 154 135 1254 1220 1141 189 316 616 331 742