We have designed a Wind Generator as our final year Engineering project. For information please go through the presentation or else you can contact me. Feel free to give your valued suggestions

1. DESIGN OF
WIND
GENERATOR

2. DESIGN OF WIND GENERATOR
PRESENTED BY
INDRAJIT CHAUHAN
GAUTAM JANGID
PIYUSH KHINVASARA
R YESODHARAN
PROJECT GUIDE
PROF. J.V. SATRE

3. INTRODUCTION
 A permanent magnet generator'(PMG) is also called an
'alternator', because it generates alternating current (AC).
 The generator output is converted into 'direct current'
(DC) for charging a 12 volt battery.
 This conversion is done with the help of a rectifier .
 Mechanical power is converted into electrical power with
the help of electromagnetic induction

4. MAIN PARTS OF PMDC GENERATOR
 The main parts of pmdc generator are stator , rotor ,
hub, yaw bearings ( base).
 Stator consists of ten copper coils, having 80 number of
turns each .
 There are 2 rotors , each rotor consists of 12 magnets .
 Stator lies between two rotors which are mounted on the
hub
 Type of magnet which we have used is neodymium
magnets of grade N35.

5. ROTOR DESIGN
 The magnet rotors consists of 12” [300 mm ] diameter
discs ,made out of steel plates .
 12 magnets are mounted on each magnet plate
 They are encapsulated in a polyester resin (epoxy)
 They are mounted in such a way that magnets face
each other
 There is a small gap between these facing
 Stator will be mounted in this gap

7. MOUNTING OF MAGNETS

8.  The Neodymium Iron Boron blocks are magnetised
through their thickness so as to produce a north pole on
one face and a south pole on the other.
 North and south poles attract each other.

9.  Each time a magnet block is placed, hold it above its
neighbour just previously placed. It should be
repelled.
 If it is attracted, then turn it over and try again. If it is
repelled then place it into its slot without turning it
over again.
 This will ensure that it has different polarity from the
previous block.

10.  Check all the magnets in position periodically with a
magnet in your fist.
 Your fist should be alternately attracted and repelled
as you progress around the circle. Hold on tight!
When it comes to fitting magnets to the second disk
you must ensure that the magnets opposite the index
mark will be of opposite polarity.
 This will ensure that the magnet rotors will attract
each other.

11. PUTTING IT TOGETHER
Fig. No. 5.7 Assembly of Rotor

12. STATOR DESIGN
 The ten coils are nearly fit into a flat mould.
 They are encapsulated with epoxy.
 The stator will have a hole in the middle through which
the five studs supporting the rotor will pass.
 Gauge of the copper wire used to make the coils is 1.5mm
,80 turns for 12V.
 Cut two sheets of Fiberglass cloth to fit inside the mould.
 Shape of the cloth is similar to stator shape.

14. LAYOUT

15. STATOR THEORY
 Coils embedded within it are dimensioned such as to encircle
the flux from one magnet pole at a time.
 As the magnet blocks pass a coil, the flux through the coil
alternates in direction.
 This induces an alternating voltage in each turn of the coil. The
voltage is proportional to the rate of change of flux.
 Voltage therefore depends on:
 1.the speed of rotation
 2.the density of the flux
 3.the number of turns in the coil.

16.  The number of turns of wire in each coil is used to
control the speed of the wind turbine.
 If the number of turns is large, then the output will
reach battery voltage and start to charge the battery at
a low rotational speed (rpm).

17. Calculation of Wind Power
•Power in the wind
Power in the Wind = ½ρAV3
– Effect of swept area, A
– Effect of wind speed, V
– Effect of air density, 
R
Swept Area: A = πR2 Area
of the circle swept by the
rotor (m2).

18. Economic and Social Advantages
• Revitalizes rural
economies
• Fewer subsidies
• Free fuel
• Price stability
• Promotes cost-effective
energy production
• Creates jobs

19. Environmental Advantages
• Clean water
• Clean air
• Mining & transportation
• Land preservation

20. Other Disadvantages
• A variable resource: the wind is not always
as strong as needed
• Killings of birds
• Lot of land is required
• Initial cost is more
• Requires maintenance

21. CONCLUSION
 From the report we studied that wind has a lot of potential in
it and if properly harnessed then it can help solve the energy
crises in the world.
 The study of wind turbine and its characteristics showed that
how it can be properly designed and used to get the
maximum output.
 The power electronic circuitries have helped the concept of
wind power a lot. Without them this concept would have
been too expensive and farfetched.
 With the rectifiers being used not only the operations have
been smoothened but also the efficiency has been increased
to a great extent.

22.  This report also showed the integration of wind farms with
the transmission grid and the problems associated with it
and the probable solutions that can be applied to solve
them and have a better performance.
 We have made this project from the materials which are
easily available in market. It is a cost efficient project with
low maintenance. Installation of this type of model is also
very easy. Efficiency of our model is also very good. And
this would help us to curb the problem of load shedding.

23.  Thus we have made a cheap and efficient wind generator
having the following rating.
 Power=300 watt
 Voltage=12 volts
 Current=25 amps
 Minimum wind speed require = 3m/s
 Approximately 169 rpm.