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REGENERATIVE BRAKING SYSTEM
By
Rohit sreekumar
SHREE RAMA EDUCATIONAL SOCIETY GROUP OF INSTITUTIONS
TIRUPATHI
CONTENTS
 Introduction
 History
 Principle of Regenerative Braking System.
 Need of Regenerative Braking System.
 Working of Regenerative Braking System.
 Types and Elements of RBS.
 Advantages and Disadvantages of RBS
 Conclusion and References.
A Regenerative Brake, is an energy recovery mechanism
which slows a vehicle or object down by converting
its kinetic energy into another form, which can be either
used immediately or stored until needed.
A Traditional Braking System, brake pads produce
friction with the brake rotors to slow or stop the vehicle.
Additional friction is produced between the slowed wheels
and the surface of the road. This friction is what turns the
car's kinetic energy into heat.
 INTRODUCTION
HISTORY
 In 1908 C.J. Paulson Patented a smart car with
Regenerative Braking System.
 The “Energy Regeneration Brake” system was
developed in 1967 by American Motors Corporation
(AMC) in cooperation with Gulton Industries.
 The Energy Regeneration from braking idea was later
commercialized by the Japanese and both Ford &
Chevrolet licensed it from Toyota for use in their
domestic built hybrid Vehicles.
 During the late 2000s, an electronic control unit used
by BMW that engages the alternator during braking.
 Law of Conservation of Energy states that the
total energy of an isolated system cannot change it is said to
be conserved over time. Energy can be neither created nor
destroyed, but can change form, for instance chemical
energy can be converted to kinetic energy in the explosion
of a stick of dynamite.
 The most common form of regenerative brake involves
using an electric motor as an electric generator. The
generated electricity is fed back into the supply system,
whereas in battery electric and hybrid electric vehicles, the
energy is stored chemically in a battery.
 PRINCIPLES OF REGENERATIVE BRAKING
 NEED OF REGENERATIVE BRAKING
 Regenerative braking have the potential to
improve the fuel economy of vehicles.
 It reduces the emission of the vehicles.
 It improved the fuel consumption by 33%.
 WORKING OF REGENERATIVE BRAKING SYS.
Regenerative braking system
 REGENERATIVE BRAKING SYSTEM IN HYBRID
VEHICLES
A vehicle which contains two such sources of propulsion is
known as hybrid system.
A hybrid vehicle consist a series and a parallel circuit of motor
and the ICE.
Regenerative braking is used in vehicles that make use of
electric motors, primarily fully electric vehicles and hybrid
electric vehicles.
It's run in one direction, it converts electrical energy into
mechanical energy.
When the motor is run in the opposite direction, a properly
designed motor becomes an electric generator, converting
mechanical energy into electrical energy.
This electrical energy can then be fed into a charging system
for the car's batteries.
WORKING OF REGENERATIVE BRAKING
SYSTEM IN HYBRID & EV’S
 REGENERATIVE BRAKING WITH BATTERIES
Regenerative braking is used in vehicles that make use of
electric motors, primarily fully electric vehicles and hybrid
electric vehicles.
It's run in one direction, it converts electrical energy into
mechanical energy.
When the motor is run in the opposite direction, a properly
designed motor becomes an electric generator, converting
mechanical energy into electrical energy.
This electrical energy can then be fed into a charging system
for the car's batteries.
 REGENERATIVE BRAKING WITH FLYWHEELS
In this system, the translational energy of the vehicle is
transferred into rotational energy in the flywheel, which
stores the energy until it is needed to accelerate the
vehicle.
The benefit of using flywheel technology is that more of
the forward inertial energy of the car can be engaged even
during relatively short intervals of braking and
acceleration. In the case of the batteries, they are not able
to accept charge at these rapid intervals, and thus more
energy is lost to friction.
 DIFFERENT TYPES OF REGENERATIVE BRAKING
SYSTEM
 Electric Regenerative Braking System.
 In an Electric System which is driven only by means of electric
motor the system consists of an electric motor which acts both as
generator and motor.
 The Main Component of Electric Regenerative Braking System.
 Engine
 Motor/Generator
 Batteries
 Electronic Control System`
During acceleration, the motor/generator unit acts as electric
motor drawing electrical energy from batteries to provide
extra driving force to move the vehicle.
During braking electric supply from the battery is cut off by
the electronic system.
Showing Charging of Battery when Brake Applied
 Hydraulic Regenerative Braking System
To improve the vehicle fuel economy an alternative
regenerative braking system is being developed by the Ford
Motor Company and the Eaton Corporation. It is called
Hydraulic Power Assist or HPA.
In this system when the driver steps on the brake, the
vehicle’s Kinetic energy is used to power a Reversible
pump.
During acceleration, fluid in high pressure accumulator is
metered out to drive the pump as a motor. The system
propels the vehicle by transmitting torque to the driveshaft.
Hydraulic type regenerative braking system
 APPLICATION OF REGENERATIVE
BRAKING SYSTEM
 Super capacitor accept and release charge
much more quickly.
 It can be discharged and recharged many
more times and with far deterioration than a
battery.
 The Mazda Unit can accept a full charge in
just 8-10 seconds
 The capacitor may take up to about 113s
when the load is at minimum about 18A.
 REGENERATIVE BRAKING SYSTEM IN
LOCOMOTIVES
• Jaipur Metro uses the
Regenerative Braking
System & saves 35%
of Electricity.
 CAR WITH REGENERATIVE BRAKING
SYSTEM
Toyota Prius
Honda Insight
Ford Escape Hybrid
Tesla Roadster
Fig.5-Toyota Prius
Fig.6-Tesla Roadster
 ADVANTAGES OF REGENERATIVE BRAKING
SYSTEM
 Increase of overall energy efficiency of a vehicle.
 Improved Performance.
 Emission Reduction.
 Reduction in Engine Wear.
 Cuts down on pollution related to electricity generation.
 Increases the lifespan of friction braking systems.
 Smaller Accessories.
 Less use of traditional mechanical brakes leads to less
wear over time
 Added Weight-Extra components can increase weight.
 Complexity-depends on control necessary for operation of
regenerative braking system.
 Cost of components, engineering, manufacturing and
installation is high.
 Friction brakes are still necessary.
 DISADVANTAGES OF REGENERATIVE BRAKING
SYSTEM
CONCLUSION
Regenerative braking is an effective method of improving
vehicle efficiency and longevity
Is already in use in many EVs
The technology to do it exists and is often well worthy
Mostly dependent on the wider adoption of EVs or further
development of hydraulic regeneration systems
THANK YOU…

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Regenerative braking system

  • 1. REGENERATIVE BRAKING SYSTEM By Rohit sreekumar SHREE RAMA EDUCATIONAL SOCIETY GROUP OF INSTITUTIONS TIRUPATHI
  • 2. CONTENTS  Introduction  History  Principle of Regenerative Braking System.  Need of Regenerative Braking System.  Working of Regenerative Braking System.  Types and Elements of RBS.  Advantages and Disadvantages of RBS  Conclusion and References.
  • 3. A Regenerative Brake, is an energy recovery mechanism which slows a vehicle or object down by converting its kinetic energy into another form, which can be either used immediately or stored until needed. A Traditional Braking System, brake pads produce friction with the brake rotors to slow or stop the vehicle. Additional friction is produced between the slowed wheels and the surface of the road. This friction is what turns the car's kinetic energy into heat.  INTRODUCTION
  • 4. HISTORY  In 1908 C.J. Paulson Patented a smart car with Regenerative Braking System.  The “Energy Regeneration Brake” system was developed in 1967 by American Motors Corporation (AMC) in cooperation with Gulton Industries.  The Energy Regeneration from braking idea was later commercialized by the Japanese and both Ford & Chevrolet licensed it from Toyota for use in their domestic built hybrid Vehicles.  During the late 2000s, an electronic control unit used by BMW that engages the alternator during braking.
  • 5.  Law of Conservation of Energy states that the total energy of an isolated system cannot change it is said to be conserved over time. Energy can be neither created nor destroyed, but can change form, for instance chemical energy can be converted to kinetic energy in the explosion of a stick of dynamite.  The most common form of regenerative brake involves using an electric motor as an electric generator. The generated electricity is fed back into the supply system, whereas in battery electric and hybrid electric vehicles, the energy is stored chemically in a battery.  PRINCIPLES OF REGENERATIVE BRAKING
  • 6.  NEED OF REGENERATIVE BRAKING  Regenerative braking have the potential to improve the fuel economy of vehicles.  It reduces the emission of the vehicles.  It improved the fuel consumption by 33%.
  • 7.  WORKING OF REGENERATIVE BRAKING SYS.
  • 9.  REGENERATIVE BRAKING SYSTEM IN HYBRID VEHICLES A vehicle which contains two such sources of propulsion is known as hybrid system. A hybrid vehicle consist a series and a parallel circuit of motor and the ICE.
  • 10. Regenerative braking is used in vehicles that make use of electric motors, primarily fully electric vehicles and hybrid electric vehicles. It's run in one direction, it converts electrical energy into mechanical energy. When the motor is run in the opposite direction, a properly designed motor becomes an electric generator, converting mechanical energy into electrical energy. This electrical energy can then be fed into a charging system for the car's batteries. WORKING OF REGENERATIVE BRAKING SYSTEM IN HYBRID & EV’S
  • 11.  REGENERATIVE BRAKING WITH BATTERIES Regenerative braking is used in vehicles that make use of electric motors, primarily fully electric vehicles and hybrid electric vehicles. It's run in one direction, it converts electrical energy into mechanical energy. When the motor is run in the opposite direction, a properly designed motor becomes an electric generator, converting mechanical energy into electrical energy. This electrical energy can then be fed into a charging system for the car's batteries.
  • 12.  REGENERATIVE BRAKING WITH FLYWHEELS In this system, the translational energy of the vehicle is transferred into rotational energy in the flywheel, which stores the energy until it is needed to accelerate the vehicle. The benefit of using flywheel technology is that more of the forward inertial energy of the car can be engaged even during relatively short intervals of braking and acceleration. In the case of the batteries, they are not able to accept charge at these rapid intervals, and thus more energy is lost to friction.
  • 13.  DIFFERENT TYPES OF REGENERATIVE BRAKING SYSTEM  Electric Regenerative Braking System.  In an Electric System which is driven only by means of electric motor the system consists of an electric motor which acts both as generator and motor.
  • 14.  The Main Component of Electric Regenerative Braking System.  Engine  Motor/Generator  Batteries  Electronic Control System`
  • 15. During acceleration, the motor/generator unit acts as electric motor drawing electrical energy from batteries to provide extra driving force to move the vehicle. During braking electric supply from the battery is cut off by the electronic system. Showing Charging of Battery when Brake Applied
  • 16.  Hydraulic Regenerative Braking System To improve the vehicle fuel economy an alternative regenerative braking system is being developed by the Ford Motor Company and the Eaton Corporation. It is called Hydraulic Power Assist or HPA. In this system when the driver steps on the brake, the vehicle’s Kinetic energy is used to power a Reversible pump.
  • 17. During acceleration, fluid in high pressure accumulator is metered out to drive the pump as a motor. The system propels the vehicle by transmitting torque to the driveshaft. Hydraulic type regenerative braking system
  • 18.  APPLICATION OF REGENERATIVE BRAKING SYSTEM  Super capacitor accept and release charge much more quickly.  It can be discharged and recharged many more times and with far deterioration than a battery.  The Mazda Unit can accept a full charge in just 8-10 seconds  The capacitor may take up to about 113s when the load is at minimum about 18A.
  • 19.  REGENERATIVE BRAKING SYSTEM IN LOCOMOTIVES • Jaipur Metro uses the Regenerative Braking System & saves 35% of Electricity.
  • 20.  CAR WITH REGENERATIVE BRAKING SYSTEM Toyota Prius Honda Insight Ford Escape Hybrid Tesla Roadster Fig.5-Toyota Prius Fig.6-Tesla Roadster
  • 21.  ADVANTAGES OF REGENERATIVE BRAKING SYSTEM  Increase of overall energy efficiency of a vehicle.  Improved Performance.  Emission Reduction.  Reduction in Engine Wear.  Cuts down on pollution related to electricity generation.  Increases the lifespan of friction braking systems.  Smaller Accessories.  Less use of traditional mechanical brakes leads to less wear over time
  • 22.  Added Weight-Extra components can increase weight.  Complexity-depends on control necessary for operation of regenerative braking system.  Cost of components, engineering, manufacturing and installation is high.  Friction brakes are still necessary.  DISADVANTAGES OF REGENERATIVE BRAKING SYSTEM
  • 23. CONCLUSION Regenerative braking is an effective method of improving vehicle efficiency and longevity Is already in use in many EVs The technology to do it exists and is often well worthy Mostly dependent on the wider adoption of EVs or further development of hydraulic regeneration systems