May 24, 2016 regenerative braking project report 1. Regenerative braking is a small, yet very important, step toward our eventual independence from fossil fuels. Regenerative braking became popular for normal service braking in the dc traction era of the late 1960s after a humble beginning of its application for steep and long down gradients in the 1930s. The present dissertation includes an introduction to friction braking, a theory of eddy current braking, analytical and numerical models of the eddycurrent brake. In the 1980s, ac motors started replacing dc motors and regenerative braking capability became inherent. Since the braking kinetic energy is converted into the electrical energy and then returns to the battery, the energy.
Because of such type of braking, the wheels can better grip the road surface and the stopping. The results indicate that even without active braking control, a significant amount of braking energy can be recovered, and the brake system does not need much changing from the brake systems of conventional passenger cars. D irection of power flow torque developed d irection of oti n wheel b attery g enerating m ode fig2. Regenerative braking is used in vehicles that make use of electric motors, primarily fully electric vehicles and hybrid electric vehicles. Regeneration takes place in quadrants ii and iv, where the direction of the torque opposes the direction of motor rotation clockwise. The design consists of an igbt buckboost converter, the battery pack in the buck side and a capacitor in the boost side. Hydraulic regenerative system for a light vehicle page i abstract the thesis is based in a constructed light vehicle that must be improved by adding a hydraulic energy recovery system. Analysis of the regenerative braking system for a hybrid. Design principle of a flywheel regenerative braking system f. Design principle of a flywheel regenerative braking system. The gm ev1 was the first commercial car to do this. Instrumentation, control, and testing of a small wind. The intention behind this was to show that regenerative braking is a cost effective way to increase the range of an electric motorbike in an urban setting. Design, fabrication and testing of regenerative braking.
Energy recovery systems in cars and detail study of flywheel regenerative braking systems jonathan fahlbeck johan kindahl bachelors thesis in mechanical engineering 15 ects examensarbete hogskoleingenjor 15 hp. Heavy vehicle braking using friction estimation for. The possibility of recovering vehicle kinetic energy is one inherent advantage of electric and hybrid electric vehicles. My apologies if this has been covered already, as im new here. Regenerative braking using buckboost converter ethesis. What are regenerative drives and where are they used. Regenerative braking applied on a dc motor youtube. In the composite braking phase shown in figure 2, the braking force on front and rear wheels is as follows. If gear is not shifted, the actual regenerative braking can be represented as 1. Electric vehicle blended braking maximizing energy recovery while. In this paper, three different braking patterns are investigated for evaluating the availability of braking energy recovery. After the revise according to points a and c, the limit values of braking severity are 0. So given this acceleration and a vehicle weight that can be used to find your required deceleration power. A buckboost converter is used to stabilize the back emf at 14v for charging the battery.
The machine now begins to operate as a generator and the energy generated is supplied to the. For regenerative braking potential in other systems, cf. The connections are such that the left front and the right rear brake are on one circuit and the right front and left rear are on the other circuit. Masters thesis, chongqing university, chongqing, china, 20. Satapathy, p p 2014 regenerative braking using buckboost converter. Instead of the surplus energy of the vehicle being wasted as unwanted heat, the motors act as generators and return some of it to the overhead wires as electricity. The regenerative braking is generally limited by the amount. This gives the driver the control of the vehicle at all times and even while braking. This electricity is then used for recharging the battery. In normal braking situation the driver control the brakes, however during severs braking or on slippery roadways when driver the wheels to approach lockup, the antilock takes over here. Analysis of regenerative braking efficiency a case study of two electric vehicles operating in the rotterdam area article pdf available september 2011. This friction is what turns the cars kinetic energy into heat. Regenerative braking system for vehicles thesis123thesis123. A buck boost converter circuit has been designed and simulated to drive a dc motor for an electric vehicle.
A free powerpoint ppt presentation displayed as a flash slide show on id. Gritt 1062002 diagonal split system in a diagonal split system, one brake line is run to each rear brake and one to each front brake. Instrumentation, control, and testing of a small wind turbine test rig by iman khorsand asgari bsc, ferdowsi university of mashhad, 2011 a thesis submitted in partial fulfillment of the requirements for the degree of master of applied science in the department of mechanical engineering iman khorsand asgari, 2015 university of victoria. Different types of methods to recover regenerative energy. We know that brake is an equipment to reduce the speed of any moving or rotating equipment, like vehicles, locomotives.
First of all we can classify the term braking in two parts. Design of regenerative braking system for an electric vehicle ev modified from used car saharat chanthanumataporn1, sarawut lerspalungsanti2 and monsak pimsarn3 1 taist toyo tech automotive engineering program, international college, king mongkuts institute of technology ladkrabang, bangkok, thailand 10520, email. For additional inquiries, please contact the repository. Jun 22, 2016 an experimental system was built consisting of two dc motors, one used to simulate a motoring condition and the other used to simulate a generating condition.
In 1997 and 1998 engineers abraham farag and loren majersik were issued two patents for this brakebywire technology. In this case a 12v battery is used as a load which is charged by back emf. Performance analysis of regenerative braking in permanent magnet synchronous motor drives andrew adib, rached dhaouadi college of engineering, american university of sharjah, p. Current production hybrids utilize a limited electric motor battery regenerative system. This vehicle named as trecolith, participated in the formula electric and hybrid competition formula ehi 2009 in italy rome and won several awards. Instrumentation, control, and testing of a small wind turbine.
Technologies regenerative braking in 50 hz, 25 kv systems. Regenerative braking systems rbss are a type of kinetic energy recovery system that transfers the kinetic energy of an object in motion into potential or stored energy to slow the vehicle down, and as a result increases fuel efficiency. This thesis presents a flywheel based mechanical regenerative braking system rbs concept for a formula sae type race car application, to improve the performance andor efficiency of the racecar. Simulation of transit bus regenerative braking systems. A buck boost converter circuit has been designed and simulated to drive a.
This method is generally used in the current period in industries. Hey everyone, ive been a long time lurker on this forum and finally just made an account. Wear reduction an electric drive train also allows for regenerative braking which increases efficiency and reduces wear on the vehicle brakes because it reduces braking noise and brake dust. A study on control strategy of regenerative braking in the. In a batterypowered electric vehicle, regenerative braking also called regen is the conversion of the vehicles kinetic energy into chemical energy stored in the battery, where it can be used later to drive the vehicle. An experimental system was built consisting of two dc motors, one used to simulate a motoring condition and the other used to simulate a generating condition.
Design, fabrication and testing of regenerative braking test. With regenerative brakes, on the other hand, the system that drives the vehicle. Conventional braking systems convert kinetic energy into heat, usually via friction. It is regenerative because the energy is recaptured in the battery where it can be used again. The work was carried out from mid september 2010 to early april 2011. Additional friction is produced between the slowed wheels and the surface of the road. Ppt regenerative braking powerpoint presentation free to. Download the seminar report for regenerative breaking. The regenerative braking force can be gained by the regenerative braking control algorithm. Regenerative drives allow motors to produce positive torque or negative torque, in either forward or reverse rotation. Introduction to regenerative braking know your parts. Pdf analysis of regenerative braking efficiency a case. Feb 21, 2012 you can caluclate the total energy available for regenerative braking by simply calculating the vehicles total kinetic energy. These systems are also called kinetic energy recovery systems.
Wang, power and thermal characterization of a lithiumion battery pack for hybridelectric vehicles, j. Analysis of regenerative braking efficiency a case study of two electric vehicles operating in the rotterdam area article pdf available september 2011 with 4,429 reads how we measure reads. My current vehicle uses an ice with a manual transmission. Aebs algorithm applies autonomous braking in order to. In this thesis project, brake performance of heavy vehicles is improved by the development of new wheelbased functions for a longitudinal slip control braking. Regenerative braking system for vehicles is the way of slowing vehicle by using the motors as brakes.
This thesis may not be reproduced in whole or in part, by photocopy. The abs modulates the brake line pressure independent of the pedal force to. Another common complaint for used hybrids is noise and pedal feel. Study of regenerative breaking control for hev with. This type of braking is possible when the driven load or machinery forces the motor to run at a speed higher than no load speed with a constant excitation. In the conventional braking systems, when the vehicle is decelerating, the kinetic energy is converted to heatdue to friction and this heat is dissipated into the surroundings and the energy is wasted. This paper describes the independent switching scheme for regenerative braking 1 as applied to a developmental electric vehicle at the university of south australia. This is referred to as fourquadrant operation and is depicted in the graphic below. Dec 30, 2018 the term braking comes from the term brake. Pdf performance analysis of regenerative braking in. The objective of this mqp was the design and manufacture of an electric motorbike with regenerative braking. Studies of regenerative braking in electric vehicle request pdf. The application of regenerative braking system to the commercial.
Instrumentation, control, and testing of a small wind turbine test rig by iman khorsand asgari bsc, ferdowsi university of mashhad, 2011. Rizzo i department of industrial engineering, university of salerno, via giovani paolo ii 2, 84084 fisciano sa italy tel. Now coming to the term or question what is braking. Jan 14, 2020 in the conventional braking systems, when the vehicle is decelerating, the kinetic energy is converted to heatdue to friction and this heat is dissipated into the surroundings and the energy is wasted. Investigation of the effectiveness of regenerative braking. This paper establishes a mathematic model of composite braking in the hydraulic hybrid vehicle and analyzes the constraint condition of parallel regenerative braking control algorithm. Antilock braking system prevents wheels from being locked up during braking by using a non continuous form of braking known as pulse width modulation pwm braking. Regenerative braking article about regenerative braking. Regenerative braking is an energy recovery mechanism that slows down a moving vehicle or object by converting its kinetic energy into a form that can be either used immediately or stored until needed. In the 1980s, ac motors started replacing dc motors. Being curious about hypermiling techniques, i occasionally disengage the gearbox an let the car coast. Regenerative braking project report linkedin slideshare.
These kinds of brakes allow batteries to be used for longer periods of time without the need to be plugged into an external charger. One of the more interesting properties of an electric motor is that, when its run in one direction, it converts electrical energy into mechanical energy that can be used to perform work such as turning the wheels of a car, but when the motor is run in. The driver may think it is the same type of stop, but to the system, a little extra speed or pressure can change braking performance or the blending of the brake mechanisms. A regenerative system captures the braking energy usually lost as heat in the disk or drum brakes of a conventional vehicle. Sharma electric brakin abstractan effective and reliable fast braking i. The process of applying brakes can be termed as braking. In this mechanism, the electric traction motor uses the vehicles momentum to recover energy that would otherwise be lost to the brake discs as heat. Under this condition, the back emf e b of the motor is greater than the supply voltage v, which reverses the direction of motor armature current. Most twomode hybrid vehicles use a braking system that employs a highspeed electric motorpump. A mechanical system is chosen to eliminate losses related to energy conversion while capturing the rotational braking energy. My final year project is in the design of a regenerative braking system for a ev. It is braking because it also serves to slow the vehicle. At other times, simply letting go of the gas pedal in a high gear will cause the car to slow down over a long period of time. International journal of instrumentation, control and automation ijica issn.
There is a number of different ways to implement regenerative braking in a bldc motor. Energy recovery systems in cars and detail study of. Regenerative braking systems rbs future of braking systems 77 motors, which results in regenerating electric energy for storage in the battery and simultaneously reducing the speed of the car with the regenerative resistance of the electric motors. Demand of improved vehicle performance is continuously at its peak, and inclination of consumers towards environment friendly vehicles like electric and hybrid vehicles is increasing in. Antilock braking system abs prevent brakes from locking during braking. The magic of tesla roadster regenerative braking tesla. In a traditional braking system, brake pads produce friction with the brake rotors to slow or stop the vehicle. Based on regenerative braking system character and ece economic commission of europe regulations, it introduces the control strategy of regenerative braking in parallel hydraulic hybrid vehicle phhv. When a vehicle drives in heavy traffic, for example in new york city, more than half of the total energy is dissipated in the brakes. Regenerative braking in regenerative braking, the power or energy of the driven machinery which is in kinetic form is returned back to the power supply mains. Development and evaluations of advanced emergency braking. Functional requirements for automatic emergency braking systems.
Masters thesis in chalmers automotive engineering and in european master of. A blended brake control merges a regenerative brake system with a friction. Students may inquire about withdrawing their dissertation andor thesis from this database. The regenerative braking system, however, slows a vehicle down in a different way. Studies of regenerative braking in electric vehicle. Development of a regenerative braking control strategy for hybridized solar vehicle m.
665 155 764 384 510 1228 1280 573 1429 320 1151 240 888 1137 672 1299 1427 223 1585 355 1059 390 578 588 131 1012 154 454 116 710 615 668 420 567 827 749 667