Types of power quality disturbances on ac electric traction. We know that there are various types of motors available dc motors, induction motors, synchronous motors, single phase motors etc. Utilization of electrical energy notes pdf uee notes pdf book starts with the topics covering type of electric drives, choice of motor, starting and running characteristics, speed control, temperature rise, particular applications of electric drives, types of industrial loads, continuous, intermittent and variable loads, load qualization, etc. The weights applied for traction are approximately 5 kg or onesixth of the total body weight. Electric traction the system which use electrical power for traction system i. First, there are shortterm, inductance limits on torque production, based on flux within the machine and flux produced by reaction currents.
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. Pdf electrical vehicles practical solutions for power. In an electric traction system the driving force to pull a train is generated by the traction motors. Electric traction system requirements, terms, advantages. 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. There are three main types of elevators commonly used. Electric motors and drives fundamentals, types and applications third edition austin hughes senior fellow, school of electronic and electrical engineering, university of leeds amsterdam boston heidelberg london new york oxford paris san diego san francisco singapore sydney tokyo newnes is an imprint of. Thomas davenport, in brandon, vermont, erected a circular model railroad on which ran batterypowered locomotives or locomotives running on batterypowered. Methods of electrialc heating resistance, arc, induction and dielectric heating. Traction elevators are lifted by ropes, which pass over a wheel attached to an electric motor above the elevator shaft. System of electric traction mechanics of train movement. In ohe, or overhead electrification systems, the supply of electricity is through an overhead system of suspended cables known as. Cervical traction stabilizes the head in an optimally reduced extension position and. Pdf on jun 1, 20, mohan krishna and others published types of power quality disturbances on ac electric traction drives.
Now according to the design, the drives can be classified into three types such as singlemotor drive, group motor drive and multi motor drive. Thomas splint traction hugh owen thomas introduced his splint which he called the knee appliance in 1875 the method of hugh owen thomas uses fixed traction with the counter traction being applied against the perineum by the ring of the splint this is in. Jun 27, 20 electric traction the system which use electrical power for traction system i. Electric traction means using the electric power for traction system i.
The global electric traction motor market is estimated to reach usd 30. What is an electric locomotive systems and their types in india. 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. Traction motors in diesel locomotives ee publishers. Electric traction motor is an electric motor which is used for driving a vehicle such as electric railways or electric vehicles. Electric traction b disadvantages because of difficulty of installing a condenser on a locomotive, the steam engines employed are of noncondensing type, therefore, efficiency is very poor 6 to 8%. Classification of electrical drives or types of electrical. Some of the technical discussion is based on work that has been reported in a conference publication1. Traction is defined as the act of drawing or pulling especially by a motive force drawing of carriage by horse constitute traction. Two types of vehicles are used for electric traction. May 22, 2018 the electric traction system ppt briefly discusses the types, supply system, traction motors, braking system, advantages and disadvantages and recent trends. Elevators types and classification part one electrical.
In the second category comes a diesel engine electric drive. The two main types of traction are skeletal traction and skin traction. Utilization of electrical energy pdf notes uee pdf notes. These types of motors are generally used in speed and positional control with applications such as fans, pumps and compressors, where reliability and ruggedness are required. Electric traction will continue to play a dominant role in the railway since it is an.
The electric traction system is the most efficient of all other traction system such as steam and internal combustion ic engine type systems. 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. Now a day, magnetic traction is also used for bullet trains. Or electric traction means a locomotion in which the driving force is obtained from electric motors. Electrical vehicles practical solutions for power traction motor systems article pdf available in ieee transactions on industry applications pp99. For mid and highrise buildings, traction or cabledriven type of. Traction means drawing or pulling something over a surface. May 05, 2016 focus on the different types of motors used in industry. Basic notions for the study of electric traction systems 17.
The type of traction used will depend on the location and the nature of the problem. We know that brake is an equipment to reduce the speed of any moving or rotating equipment, like vehicles, locomotives. 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. Dec 30, 2018 types of braking brakes are used to reduce or cease the speed of motors. Now coming to the term or question what is braking. The drive which uses the electric power for moving forward, such type of drive is called an electric traction drive. Electric traction systems seminar report a traction system causes the propulsion of vehicle in which tractive or driving force is obtained from various devices such as diesel engine drives. A counter weight makes the elevators more efficient. In mechanical terms, it is defined as the adhesive friction between the wheel and the surface on which it moves between a car tire and road. The classification of electrical drives can be done depending upon the various components of the drive 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. Hybrid electrical vehicles introduction a hybrid electric vehicle hev has two types of energy storage units, electricity and fuel. Adequate supplies of feed water at regular intervals are required.
The system which use electrical power for traction system i. The electric traction system ppt briefly discusses the types, supply system, traction motors, braking system, advantages and disadvantages and recent trends. 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. Cervical traction is set up after the induction of anesthesia. The track electrification refers to the type of source supply system that is used while powering the electric locomotive systems. The first type of vehicle receives power from a distribution network while the second type of vehicle generates own power. The process of applying brakes can be termed as braking. They are used for mid and highrise applications and have much higher travel speeds than hydraulic elevators. Traction system which does not uses the electrical power to drive, are called non electrical traction system. The permissible range of voltages allowed for the standardised voltages is as stated in standards bs en 50163 and iec 60850. Ppt electric traction system powerpoint presentation. One of the major application of an electric drive is to transport men and materials from one place to another. It offers several benefits over other systems, including quick start and stop, very efficient, pollutionfree, easy to handle and easy speed control. All heating requirements in domestic purposes such as cooking, room heater, immersion water heaters, and.
Classification of electric motors electrical knowhow. Pdf types of power quality disturbances on ac electric. Instead, the commutation of the windings of a bdc motor is done mechanically. Different types of motors used in electric vehicles. The patient is placed prone with the head end of the table elevated to about 35 degrees fig. Regenerative drive system in elevator is a remarkable advancement in these energy efficient elevators. Traction system can be broadly classified as steam engine drive, internal combustion engine drive and.
It is more efficient compared to the non electric system and offers several benefits also such as quick start and stop, pollutionfree, and easy to handle. At each traction substation, normally two single phase transformers are installed, one which is in service and the other is 100% stand by. A survey find, read and cite all the research you need on researchgate. First of all we can classify the term braking in two parts. There are various types of elevators for various building types. 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. What is an electric locomotive systems and their types in. Oct 20, 2017 traction is defined as the act of drawing or pulling especially by a motive force drawing of carriage by horse constitute traction. Hydraulic elevators are supported by a piston at the bottom of the elevator that pushes the elevator up as an electric motor forces oil or another. The rotor and stator windings are connected in parallel. Electric traction motor market by component hardware.
The electric traction system can be broadly divided into two groups. Types of electric motors electric motors dc motors other motors h ac motors s unt motor separately excited induction motor stepper motor motor brushlessdc motor series motor hysteresis motor permanent magnet dc pmdc synchronous motor reluctance motor compounded motor universal motor. If you are looking for the different types of elevators installed in commercial facilities, this post should help. The basic aim is to give a detailed description of how the most generally used traction and engine systems work in presentday railways. Jul 31, 2014 1 what are the requirements of an ideal electric traction system. Electric traction 1701 however, the steam locomotive suffers from the following disadvantages. An example of brushless design are in stepper motors, which are primarily used in openloop position control, with uses from printers through to industrial applications. The different types of electric tractions mainly include electric trains, buses, trolleys, trams, and solarpowered vehicles inbuilt with battery. 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. Cervical traction an overview sciencedirect topics.
Electric traction part 01 brief history of indian railways, important terms and mechanism of train movement brief history of indian railways there were indian merchants, both in calcutta. Thomas davenport, in brandon, vermont, erected a circular model railroad on which ran batterypowered locomotives or locomotives running on batterypowered rails in 1834. Electricity is used to drive the electric locomotives. Oct 28, 2015 electric traction part 01 brief history of indian railways, important terms and mechanism of train movement brief history of indian railways there were indian merchants, both in calcutta. There may be two types of traction classifications on the basis of power supply.
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. A segmented copper sleeve, called a commutator, resides on the axle of a bdc motor. Elevators will carry people and other items that need to be taken to various levels of a building, within a certain weight capacity. Lumbar traction is the process of applying a stretching force to the lumbar vertebrae through body weight, weights, andor pulleys to distract individual joints of the lumbar spine.
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