This document describes a project to generate electricity from speed breakers. Speed breakers cause wasted energy through vehicle friction that passes over them. The project aims to convert this mechanical energy through a rack and pinion gear arrangement connected to a generator. As vehicles pass over the speed breaker, the up and down motion is converted to rotational motion to generate electricity. The electricity could then be used to power street lights or charge batteries. Tests showed increased voltage generation with higher vehicle speeds and loads. The system provides a low-cost way to capture wasted kinetic energy.

1. ELECTRICITY GENERATION
FROM SPEED BREAKER
BY
M.DEVENDER
(08C31A0232)
BALAJI INSTITUTE OF TECHNOLOGY AND SCIENCE

2. Introduction:
 Is anyone happy with current situation of
electricity in India?
 So, this is our small step to try to improve
this situation by our project.
 A large amount of energy is wasted at the
speed breakers through friction, every
time a vehicle passes over it.

3. Scope and Uses:
 Low Budget electricity production
 Less floor area
 No obstruction to traffic
 Easy maintenance
 Suitable at parking of multiplexes, malls,
toll booths, signals, etc.
 Uses: Charging batteries and using them
to light up the streets, etc.

4. BASIC PRINCIPLE:
 Simple energy conversion from
Mechanical to Electrical.
 To generate electricity using the vehicle
weight (potential energy) as input
 Possible using 3 different mechanisms:
I. Crank-shaft mechanism
II. Roller mechanism
III. Rack- Pinion mechanism

5.  Crank-shafts are required to be mounted
on bearings which creates balancing
problem leading to mechanical vibrations
which in turn damage the bearings.
 Secondly as bearings are of sliding type,
any occurrence of variable load( which is
bit obvious in case of vehicles!!) leads to
balancing problem.

6.  Roller mechanism has some different
disadvantages.
 Maintenance will be very difficult
 Might cause collision.

7.  Rack-Pinion assembly gives good
mounting convenience
 Maximum gear losses– 3 to 5%
 Efficiency– 95%

8. BLOCK DIAGRAM:

9. CONSTRUCTIONAL DETAILS:

10. Working process:
 Here the reciprocating motion of the
speed-breaker is converted into rotary
motion using the rack and pinion
arrangement.
 The axis of the pinion is coupled with the
sprocket arrangement.
 The axis of the smaller sprocket is
coupled to a gear arrangement.
 Finally the gear arrangement is coupled
with the generator.

11. Out put graphs:
VOLTAGE GENERATED (VS) SPEED OF VEHICLE:
Speed of vehicle Voltage generated
(kmhr) (volts)
10 7.93
20 6.28
30 5.03
40 4.66
50 3.03

12. VOLTAGE GENERATED (VS) LOAD:
 Speed of vehicle=10km/hr
Load(kgs) Generated Voltage (V)
60
60 8.33
130 9.45
170 10.22
200 11.23
270 11.81

13. ADVANTAGES:
• Pollution free power generation.
• Simple construction, mature technology,
and easy maintenance.
• No manual work necessary during
generation.
• Energy available all year round.
• No fuel transportation problem.
• No consumption of any fossil fuel which
is non-renewable source of energy.

14. Future Scope:
 Such speed breakers can be designed for
heavy vehicles, thus increasing input
torque and ultimately output of generator.
 More suitable and compact mechanisms to
enhance efficiency.

15. Conclusion:
 The existing source of energy such as
coal, oil etc may not be adequate to meet
the ever increasing energy demands.
These conventional sources of energy are
also depleting and may be exhausted.
 It is an non conventional type of
producing the energy. This project is a
one step to path of exploring the
possibilities of energy from several
non-conventional energy sources .