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DEPARTMENT OF AUTOMOBILE ENGINEERING
MCE
NO 16 SALGAME ROAD, HASSAN
KARNATAKA– 573202
MARCH -2021
REGENERATIVE BRAKING SYSTEM
SEMINAR ON
By:
Harshith V.C
(4MC17AU018)
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.
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.
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.
COMPONENTS REQUIRED
 Brake drum (which is attached to the wheels)
 Friction lining
 Controller
 Electric generator (DC. Motor)
 Linking mechanism
DIAGRAM
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.
KineticEnergyRecovery 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
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
Flywheel of K.E.R.S
 Made of steel and carbon fiber
which rotates at over 60,000 RPM.
 60 kW power transmission in either
storage or recovery.
ADVANTAGES
 Reduction of pollution
 Increase in engine life
 Breaking is not total loss
 Wear Reduction
 Increase the lifespan of friction braking system
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.
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
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.
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
THANK YOU

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Regenerative braking sytem

  • 1. DEPARTMENT OF AUTOMOBILE ENGINEERING MCE NO 16 SALGAME ROAD, HASSAN KARNATAKA– 573202 MARCH -2021 REGENERATIVE BRAKING SYSTEM SEMINAR ON By: Harshith V.C (4MC17AU018)
  • 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
  • 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. KineticEnergyRecovery 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 transmission in 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