Regenerative Braking System ppt
- 1. Department of Mechanical Engineering FINAL YEAR TECHNICAL SEMINAR REGENERATIVE BRAKING SYSTEM BY: MD. ASLAM HUSSAIN
- 2. What are Brakes ? A brake is a device that decelerates a moving object / prevents an object from accelerating Brakes use friction to convert kinetic energy into heat. When the brake is pushed the caliper containing piston pushes the pad towards the brake disc which slows the wheel down.
- 3. CONVECTIONAL BRAKING SYSTEM Conventional braking systems use friction to counteract the forward momentum of a moving car. As the brake pads rub against the wheels, excessive heat energy is created. This heat energy dissipates into the air, wasting up to 30% of the car's generated power.
- 4. RENERATIVE BRAKING SYSTEM Regenerative braking technology funnels the energy created by the braking process back into the system in the form of charging the battery for further use. In a regenerative braking system the energy normally lost in the braking process is transferred to the generator from the rotating axel and then transferred to the battery, thus saving energy.
- 5. COMPONENTS REQUIRED Brake drum (which is attached to the wheels) Friction lining Controller Electric generator (DC. Motor) Linking mechanism
- 6. DIAGRAM
- 7. How does it work ? Vehicles driven by electric motors use the motor as a generator when using regenerative braking. it is operated as a generator during braking and its output is supplied to an electrical load, the transfer of energy to the load provides the braking effect. Many modern hybrid and electric vehicles use this technique to extend the range of the battery pack.
- 8. Kinetic Energy Recovery System The device recovers the kinetic energy that is present in the waste heat created by the car’s braking process The concept of transferring the vehicle’s kinetic energy using Flywheel energy storage was postulated by physicist Richard Feynman in the 1950s
- 9. Working of K.E.R.S When the driver brakes most of the kinetic energy is still converted to heat energy but a portion is treated differently and is stored up in the car. When the driver presses his boost button that stored energy is converted back into kinetic energy The mechanical KERS system utilise flywheel technology to recover and store a moving vehicle’s kinetic energy which is otherwise wasted when the vehicle is decelerated
- 10. Flywheel of K.E.R.S Made of steel and carbon fiber which rotates at over 60,000 RPM. 60 kW power transmissionin either storage or recovery.
- 11. ADVANTAGES Reduction of pollution Increase in engine life Breaking is not total loss Wear Reduction Increase the lifespan of friction braking system
- 12. DISADVANTAGES Added weight extra component can increase weight. Friction brakes are still necessary. Safety primary concern with any energy storage unit of high energy density Added maintenance requirements dependent on the complex of design.
- 13. APPLICATION For recovering Kinetic energy of vehicle lost during braking process. Regenerative braking is used in some elevator and crane hoist motors. One theoretical application of regenerative braking would be in a manufacturing plant that moves material from one workstation to another on a conveyer system that stops at each point
- 14. CONCLUSION The energy efficiency of a conventional brake is only about 20 percent with the remaining 80 percent of its energy being converted to heat through friction. The important thing about regenerative braking is that it may be able to capture as much as half of that wasted energy and put it back to work. This reduces fuel consumption by 10 to 25 percent , Hence regenerative braking system plays an important role in fuel consumption and also in the fuel of speed.
- 15. REFERENCES wikipedia.org/wiki/Regenerative brakes Auto.howstuffworks.com/auto-parts/brakes/brake- types/regenerative-braking S.J.Clegg, “A Review of Regenerative Braking System”, Institute of Transport Studies, University of Leeds, Working paper of 471, 1996. Chibulka.J, “Kinetic Energy Recovery System by means of Flywheel Energy Storage”,Advanced Engineering, Vol. 3, No. 1, 2009, pp. 27-38
- 16. THANK YOU