This document discusses regenerative braking systems. It explains that conventional braking systems waste kinetic energy as heat, while regenerative braking systems capture this energy and convert it to electrical energy which is stored in batteries. There are different types of energy storage used. Regenerative braking can recapture around half of the energy lost in braking, improving fuel efficiency by 25-45%. While it has limitations, regenerative braking provides benefits by reducing wear on brake pads and fuel usage, making hybrid and electric vehicles more efficient. Popular car models that use this technology are listed.

2.  Conventional braking system
 Regenerative braking system
 How does it works
 Types of regenerative braking system
 Regenerative braking efficiency
 Limitations
 Models having RBS
 Conclusion

3.  Friction is used for braking.
 Excessive heat energy is created
during braking.
 This heat energy dissipates into the
air wasting as much as the vehicle
80% of the vehicle generated power
 Conventional Braking reduced
fuel efficiency.

4.  Regenerative braking means recapturing the
kinetic energy of the vehicle motion and
turning into another energy during braking.
 Commonly, kinetic energy is converted into
electric energy
 This energy is stored in storage battery and
used later to power the vehicle in hybrid or
fully electric vehicles.

5.  By applying brakes, the electric motors
coupled with drive wheels, rotated in reverse
mode slowing down the car’s wheels.
 A properly designed motor becomes an
electric generator, converting into electrical
energy.
 This energy is feeding back into storage
battery and used to accelerate the vehicle.

7.  Flywheel energy storage
 Compressed gas energy storage
 Capacitor energy storage

8. REGENERATIVE BRAKING EFFICIENCY
The energy efficiency of a conventional
car is about 20 percent. About 80% is lost
in heat energy.
 Regenerative systems can capture and
return around half of the energy lost in
braking.
Reducing fuel use about 25 to 45 percent.

9. CARS HAVING
REGENERATIVE
BRAKING SYSTEM
CHEVROLET VOLT

10. BMW’S 5 SERIES
TESLA ROADSTER

11. HONDA FIT EV
NISSAN LEAF

12.  Regenerative braking only works on “drive wheels.”
 Regenerative brakes typically don’t provide enough
braking force under panic stop conditions.
 The friction brake is a necessary back-up in the event
of failure of the regenerative brake
 The efficiency of a regenerative system is limited by
factors like the capacity of the energy storage system
and the output of the electric motor

13.  Regeneration braking can minimize the wear
of the brake pads, and reduce the
maintenance cost significantly.
 It gives a good future to fully electric and
hybrid vehicle.
 Regenerative brake is a small but important
step toward our eventual independence from
fossil fuel.

14.  http://alternativefuels.about.com/od/glossary/g/regenbr
aking.htm
 http://auto.howstuffworks.com/auto-parts/brakes/brake-types/
regenerative-braking.htm
 www.driveforinnovation.com
 www.gizmag.com
 www.carsdirect.com
 http://en.wikipedia.org/wiki/Regenerative_brake
 www.wisegeek.com

15. PRESENTED BY:
AKASH KUMAR BHANDARI
11MEB325
GC1416