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