This is a technology which stores the kinetic energy of a vehicle under deceleration and reuses it to boost the speed of vehicle while acceleration.

1. KINETIC ENERGY
RECOVERY SYSTEM(KERS)
Done by,
B.SENTHIL PANDI(17MC040)
II-B.E.MECHATRONICS
SNS COLLEGE OFTECHNOLOGY.

2. OUTLINE :
• Introduction
• History
• Basic Elements of KERS
• Working Principle
• Types of KERS
• Advantages and Disadvantages of KERS
• Conclusion.

3. INTRODUCTION :
• KERS is a collection of parts which takes some of kinetic
energy of a vehicle under deceleration, stores this energy
and then releases the stored energy back into the drive train
of the vehicle, providing a power boost to that vehicle.
• Thus the driver has two power sources, one is the engine
and other is the stored kinetic energy.

4. HISTORY :
• The first of these systems to be revealed was the flybrid.
• This system weighs 24 kg and has an energy capacity of
400 KJ after allowing for internal losses.
• A maximum power boost of 60 kW for 6.67 seconds is
available.

5. BASIC ELEMENTS OF KERS :
• In essence a KERS systems is simple, you need a
component for generating the power, one for storing it and
another to control it all.
The KERS system has three main components :
1. The MGU,
2. The PCU,
3. Batteries/Flywheel.

6. MGU(MOTOR/GENERATOR UNIT) :
• While a motor-generator set may consist of distinct motor
and generator machines coupled together, a single unit
motor-generator will have both rotor coils of the motor
and the generator wound around a single rotor, and both
coils share the same outer field coils or magnets working
in two modes, the MGU both creates the power for the
batteries when the car is braking, then return the power
from the batteries to add power directly to the engine,
when the KERS button is deployed.

7. PCU(POWER CONTROL UNIT) :
• It serves two purposes, firstly to invert and control the
switching of current from batteries to the MGU and
secondly to monitor the status of individual cells with the
battery.
• Managing the battery is critical as the efficiency of a pack
of Li-ion cell will drops if one cell starts to fail.

8. WORKING PRINCIPLE :
• The basic working principle involves the storing the
energy involved with deceleration and using it for
acceleration.
• A standard KERS operates by a ‘charge cycle ‘and a ‘boost
cycle’.
• As the car slows for a corner, an actuator unit captures the
waste kinetic energy from rear brakes. This collected
kinetic energy is then passed to the CPU and the storaging
system.

9. WORKING OF KERS :

10. TYPES OF KERS :
There are two basic types of KERS systems :
1. Electrical,
2. Mechanical.
• The main difference between them is in the way they
convert the energy and how they store it in the vehicle.

11. ELECTRICAL KERS :
• In electrical KERS, braking rotational force is captured by
an MGU mounted to the engines crankshaft.
• This MGU takes the electrical energy that it converts from
kinetic energy and stores it in batteries.
• The most difficult part in designing the electrical KERS is
how to store the electrical energy.
• Most racing systems uses a lithium battery which is
nothing but a large phone battery.

13. MECHANICAL KERS :
• The mechanical KERS system has a flywheel as the energy
storage device and it does away with MGUs by replacing
them with a transmission to control and transfer the energy
to and from the driveline.
• The kinetic energy of the vehicle ends up as a kinetic
energy of a rotating flywheel through the use of shafts and
gears.

15. ADVANTAGES OF KERS :
• High power capability
• Light weight and small size.
• Long system life of upto 250,000 kms.
• Completely safe.
• A truly green solution.
• High efficiency storage and recovery.

16. DISADVANTAGES OF KERS :
• The KERS system can weigh 35 kg or more, and for many
teams this means they have to decrease the amount of
ballast in car.
• The battery-based system stores the energy as an electric
currents , and any fool knows electric current can be
dangerous.
• The electric current stored by the system is enough to kill
someone(only a few milliamps through the heart can kill a
person)

17. CONCLUSION :
• It’s a technology for the present and the future because it is
environment friendly, reduces emission, and has a low
production cost.
• The KERS have major areas of development in power
density, life, simplicity, effectiveness and first and
foremost the cost of devices.

18. THANK YOU