Symptoms of a bad or failing traction control module. System of electric traction mechanics of train movement. It is used in electric trains, tramcars, trolley buses and diesel electric vehicles etc. It is the developing trend of new generation electric vehicle driving systems. System such a diesel electric drive, electric drive etc. Feb 28, 2017 electric traction means by means of the electric power for traction system i. What is an electric locomotive systems and their types in. Traction control system architecture in order to realise the above functions, the traction control system deploys multiple microprocessors and microcontrollers. However, most electric vehicles developed until now have not yet utilized it. The calcutta metro uses 750v dc traction with a thirdrailmechanism for delivering the electricity to the emus electricmultiple units. The most vital factor against electric traction is the initial high cost of laying out overhead electric supply system.
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. Active safety technologies like antilock braking system abs. The main purpose of employing this system is to control wheel slip occurring during acceleration on slippery roads. A secondary winding is taken off for the ac to dc converter, which produces a dc output to pass to the motor converter, which then provides the controlled three phases to the traction motors. Moreover, in electric vehicles a wellmanaged traction control system. The growth in the market can be observed with the rise in demand for safety applications. Railway transportation systems for a comfortable future.
Pdf recently electric vehicles evs including fuelcell and hybrid vehicles have been developed very rapidly as a solution of energy and. Electric traction is part of subject utilization of electrical energy. Traction control system for an electric vehicle download pdf info publication number us7747363b1. Pdf modeling and analysis of a traction control system for two. A method and apparatus for optimizing the torque of the electric motor of an electric vehicle is provided, the torque adjustments taking into account wheel slip as well as other vehicular operating conditions. Mitsubishi electric delivers overall optimized control for train systems by incorporating the train control and management system tcms as the main component. The comparative study shows that the system under traction control is stable in. Undoubtedly one of the systems in an ev that drains the most amount of energy is the propulsion system. Traction control is an important element in modern vehicles to enhance drive efficiency, safety, and stability. In an electric traction system the driving force to pull a train is generated by the traction motors. This project, proposed by the electric vehicle team, was intended to research the positive andor negative effects of utilizing traction control and transmission systems on an electric motorcycle. In icv, this is realized mainly by the following three techniques.
May 16, 2018 traction control is a technology designed to help your vehicle maintain traction, no matter how slippery the road surface. Traction control is a car safety feature that prevents wheels from spinning on lowgrip surfaces. The electric traction system ppt briefly discusses the types, supply system, traction motors, braking system, advantages and disadvantages and recent trends. Electric traction means use of the electricity for all the over machines. Introduction traction driving forward of vehicle is called traction and the system, which employs this type of mechanism is called traction system. Its raining as you drive on a darkened highway late at night, but you never worry about safety your car has. By electric traction is meant locomotion in which the driving or tractive force is obtained from electric motors. For traction control purposes, a simplified traction system has been developed for the locomotive model based on the bogie traction control strategy of one inverter per bogie implemented as a. The electric vehicle team intended on competing in the. In emergency situation, a sliding mode control algorithm was employed to achieve antislip control through keeping the wheels slip ratios below 20%. If the traction control system tcs and antilock brake system abs share the same module, there may also be problems with the antilock brake abs system.
Pdf traction control system for motorcycles researchgate. Power failure for few minutes can cause traffic dislocation for hours. The intended traction control strategy, which will be discussed in detail in a later chapter, takes advantage of the electric motors to control the torque to the wheels. Traction is produced by friction between tire and road, which is a nonlinear function of wheel slip. Average rating from 11,252 customers who received a brake pads replacement. 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. How to start and control the speed of traction motors. Jun 27, 20 introduction traction driving forward of vehicle is called traction and the system, which employs this type of mechanism is called traction system. Tireroad friction estimation and traction control strategy for. The track electrification refers to the type of source supply system that is used while powering the electric locomotive systems. Traction systems for locomotives and high speed applications. 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. In order to introduce the traction control system into the gensys model, a special subroutine with a simplified traction system based on the bogie traction control strategy of one inverter per.
Technically, it is a mechanical, hydraulic, or electric system that maintains or controls traction to any wheels driven by the engine. The electric traction system can be broadly divided into two groups. Electric traction means by means of the electric power for traction system i. A novel traction control without chassis velocity for electric. 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. Pdf power quality issues in railway traction system. In this paper, two novel traction control techniques of electric vehicle using this advantage are proposed. Review of traction and braking control for electric vehicle. The system which use electrical power for traction system i.
This is achievable through the precise control of the electric powertrain torque at the wheel. Electric traction system 1 electric traction system presented by amit raj roll no. Both active safety and fuel economy are important issues for vehicles. In resistance control or series parallel control a great deal of energy is dissipated in the starting resistance and jerks are experienced when the controller of the starter moves from one position to another position. Traction control tcs is a stability control feature closely associated with abs. To ensure continuity of supply under all conditions, the high voltage feed to the traction substations is invariably arranged wither from two. It offers several benefits over other systems, including quick start and stop, very efficient, pollutionfree, easy to handle and easy speed control. Us7747363b1 traction control system for an electric vehicle. May 22, 2018 the electric traction system ppt briefly discusses the types, supply system, traction motors, braking system, advantages and disadvantages and recent trends. Tcs is activated when throttle input and engine torque are mismatched to road. Ppt electric traction system powerpoint presentation free. In proceedings of the fisita 2014 world automotive congress, 26 june 2014, maastricht, the netherlands document status and date. Traction control is a technology designed to help your vehicle maintain traction, no matter how slippery the road surface. The calcutta trams use 550v dc with an overhead line catenary.
Electric traction control the railway technical website. A traction control strategy with an efficiency model in a. Calcutta had an overhead 3kv dc system until the 60s. Thomas davenport, in brandon, vermont, erected a circular model railroad on which ran batterypowered locomotives or locomotives running on batterypowered rails in 1834. Act of drawing or state of being drawn propulsion of vehicle is called tractions.
A traction control system tcs, also known as asr is typically but not necessarily a secondary function of the electronic stability control esc on production. Pdf a survey of traction control and antilock braking systems of. A novel traction control for electric vehicle without. Jan 31, 2016 electric traction is part of subject utilization of electrical energy. 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.
It also plays a significant role in capturing energy from regenerative braking and feeding it. What is an electric locomotive systems and their types in india. The feature works out the rotational speed of each wheel to determine if any of the wheels receiving power are behaving in a way that suggests it does not have enough grip to match the power being delivered without slipping. The catenary a singlephase traction 25kv50hz system. Traction control of an electric formula student racing car. Among traction specialists, abb excels with the broadest traction portfolio and engineering capabilities for tailormade solutions. Microprocessorbased traction control system for 25 kv ac. Traction power electrification system investigation wmata. Electric traction has many advantages as compared to other non electrical systems of traction including steam traction. 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. It allows brake actuation pressure to be generated to brake a driven wheel to prevent it spinning when peak adhesion has been lost during acceleration, and thus maintain traction by transferring the drive torque to another drive wheel that does have full adhesion.
Multiple drive systems per vehicle can be supported due to the safety case and levels of torque integrity employed. One is the model following control and another is the optimal slip ratio control. The control objective is to operate vehicles such that a desired wheel slip ratio is. The traction motor is suitable for a range of vehicle applications, from medium size passenger cars to light duty commercial vehicles. Control techniques for electric drives, block diagram representation, transfer functions, transient response, frequency response and stability, compensating techniques. In this paper, a slidingmode control approach is used to design a robust traction controller. Usually, traction control will make use of the same wheelspeed sensors as the antilock braking system. The same was true with manhattans former streetcar system. Ppt electric traction system powerpoint presentation. In this work the existence of an optimal slip ratio that.
Publishers pdf, also known as version of record includes final page, issue and volume numbers. The electric traction system is the most efficient of all other traction system such as steam and internal combustion ic engine type systems. The evidence of this mode of running can still be seen on the track down the slope on the. Us7747363b1 traction control system for an electric. Pdf traction control is a widely used control system to increase stability and. Traction control of electric vehicles using slidingmode. The railway system division, in its commitment to future progress, has consistently achieved technological breakthroughs on three systems that are shaping the future worldwide.
To ensure continuity of supply under all conditions, the high voltage feed to the traction substations is. To realize the effective traction control system, we need a sophisticated mechanism quickly to reduce the excessive driving torque. A traction control system tcs, also known as asr from german. Nov 18, 2015 traction control is a car safety feature that prevents wheels from spinning on lowgrip surfaces. There are various systems of traction prevailing in our country such as steam engine drive, electric drive. Simplified and advanced modelling of traction control. In deep and trustful partnerships with vehicle builders, refurbishers, and rail operators, we supply stateoftheart traction systems. We combine decades of rail experience and a worldleading position in areas such as traction transformers with a wealth.
Abb is the expert for traction converters, motors, transformers, and complete traction chain solutions. Jun 18, 20 typical voltages used for electric traction are 1. The purpose of power modulebased traction inverter is to convert the dc current from the electric vehicles battery to ac current to be used in the electric motor to drive the vehicles propulsion system. Table ii shows the specifications of the inwheel motors.
Schematic of 25kv traction control system with the 25kv fed into a transformer. As the name suggests, this system deals with controlling the traction of the drive wheels of the vehicle. Its a very important topic for various recruitment exams like state electricity board exams etc. Robust modelbased fault diagnosis for dynamic systems, kluwer academic. Electric vehicle traction control a new mtte approach with pi observer. Pdf vehicle traction control and its applications semantic scholar. Our creation of system platforms for the collection and utilization of train monitoring data in cooperation with wayside equipment enables us to also realize cbm. Simplified and advanced modelling of traction control systems.
The metadyne control system is based on constant current system of speed control. The permissible range of voltages allowed for the standardised voltages is as stated in standards bs en 50163 and iec 60850. Jan 12, 2016 the traction control system tcs warning indicator light may be on in the dashboard, and the traction control system tcs might remain on all the time or be completely off all together. Smart traction control systems for electric vehicles using acoustic.
This paper focuses on a traction control strategy with an efficiency model in a distributed driving electric vehicle. November 1720, 20 control systems for high performance electric cars. Federal transit administration december 9, 2016 8 new insulators that can be removed for cleaning and then reinstalled. Train traction systems for passenger comfort and easier. Unless the traffic to be handled is heavy, electric traction becomes uneconomical.
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