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Project on ‘Sources of Energy’- 
Hub Dynamo 
Guided by:- 
Mr. L.N. Gupta 
(P.G.T Chemistry) 
Presentation by XI-A:- 
Prash...
Contents 
o Some Terms and Definitions 
o Introduction to the Project 
o Working of Dynamo 
o Flowchart- Dynamo 
o Going t...
Some Terms and Definitions 
• What is Rotational Energy? 
The Rotational energy (a type of mechanical energy), also known ...
• What is a Dynamo? 
A dynamo is a machine for converting mechanical energy into 
electrical energy, typically by means of...
Working of Dynamo 
Inside the dynamo a permanent magnet is rotated in the middle of 
some coils of wire. Rotating the magn...
Rotation of 
Wheel 
Rotation of 
Permanent 
Magnet 
Generation of 
Electricity in the 
Coils of Wire 
Gradual 
Changing of...
Introduction 
Let us first know what the project is about. 
Suppose you have a bicycle which lacks light in front and/or b...
Conversion from Mechanical Energy to Electric Energy using dynamo in bicycle: 
Renewable Source of Energy
Going through the Project 
1.Rear tyre of Bicycle 
2.Backlight (glows when tyre is rotated) 
3.Bicycle Stand Connected wit...
Explanation to the Project. 
The bigger tyre is the rear- tyre of 
bicycle and is connected with a 
stand(portable). The s...
Uses of Dynamo-in-Bicycle 
 To power bicycle lights w/o having to rely on batteries. 
 To avoid accidents during the nig...
References 
• http://www.gcsescience.com/pme21.htm 
• http://www.livestrong.com/article/ 
• http://exege.com/dynamos 
• ht...
CLASS XI A 
KENDRIYA VIDYALAYA JANAKPURI, NEW DELHI
Renewable Sources of Energy- Dynamo in Bicycle
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Renewable Sources of Energy- Dynamo in Bicycle

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How can we use a renewable Energy Source to ride a bicycle which can emit light in the night and that too, without no money spent?
This Presentation depicts the production of electricity by simply paddling your bicycle.
Of course it is a little expensive, but surely it is better than the battery system...
You can apply it too in your bicycle!
To know more, download the Powerpoint Presentation.

Published in: Science
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  • DOWNLOAD FULL eBOOK INTO AVAILABLE FORMAT ......................................................................................................................... ......................................................................................................................... 1.DOWNLOAD FULL. PDF eBook here { https://tinyurl.com/y3nhqquc } ......................................................................................................................... 1.DOWNLOAD FULL. EPUB eBook here { https://tinyurl.com/y3nhqquc } ......................................................................................................................... 1.DOWNLOAD FULL. doc eBook here { https://tinyurl.com/y3nhqquc } ......................................................................................................................... 1.DOWNLOAD FULL. PDF eBook here { https://tinyurl.com/y3nhqquc } ......................................................................................................................... 1.DOWNLOAD FULL. EPUB eBook here { https://tinyurl.com/y3nhqquc } ......................................................................................................................... 1.DOWNLOAD FULL. doc eBook here { https://tinyurl.com/y3nhqquc } ......................................................................................................................... ......................................................................................................................... ......................................................................................................................... .............. Browse by Genre Available eBooks ......................................................................................................................... Art, Biography, Business, Chick Lit, Children's, Christian, Classics, Comics, Contemporary, CookeBOOK Crime, eeBOOK Fantasy, Fiction, Graphic Novels, Historical Fiction, History, Horror, Humor And Comedy, Manga, Memoir, Music, Mystery, Non Fiction, Paranormal, Philosophy, Poetry, Psychology, Religion, Romance, Science, Science Fiction, Self Help, Suspense, Spirituality, Sports, Thriller, Travel, Young Adult,
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Renewable Sources of Energy- Dynamo in Bicycle

  1. 1. Project on ‘Sources of Energy’- Hub Dynamo Guided by:- Mr. L.N. Gupta (P.G.T Chemistry) Presentation by XI-A:- Prashant Kumar Ankit Singh Tanwar Sanyogita Singh Nancy Kumari Aditya Sahu Nirmal Kumar
  2. 2. Contents o Some Terms and Definitions o Introduction to the Project o Working of Dynamo o Flowchart- Dynamo o Going through the Project o Working with the Model
  3. 3. Some Terms and Definitions • What is Rotational Energy? The Rotational energy (a type of mechanical energy), also known as angular kinetic energy is the kinetic energy produced because of the rotation of an object or an entity and is a fraction of its total kinetic energy. • What is Electrical Energy? Electrical energy is the energy carried by moving electrons in an electric conductor. It cannot be seen, but it is one of our most useful forms of energy because it is relatively easy to transmit and use. Rotational Energy Electrical Energy
  4. 4. • What is a Dynamo? A dynamo is a machine for converting mechanical energy into electrical energy, typically by means of rotating coils of copper wire in a magnetic field. • What is a Hub Dynamo(Bicycle Dynamo)? A small generator is fitted to a bicycle to provide electricity for the lights at night. The generator is called a hub dynamo. It is also known as Bicycle Dynamo. the hub dynamo is (usually) not actually a dynamo, which creates DC, but a low-power magneto that creates AC. Dynamo Working of Hub Dynamo
  5. 5. Working of Dynamo Inside the dynamo a permanent magnet is rotated in the middle of some coils of wire. Rotating the magnet instead of the coils has the advantage that slip rings are not needed. The rotating magnet produces a changing magnetic field and this generates electricity in the coils of wire. The top of the dynamo is touched against the rim of the tyre which rotates when the bicycle is moving.
  6. 6. Rotation of Wheel Rotation of Permanent Magnet Generation of Electricity in the Coils of Wire Gradual Changing of Magnetic Field
  7. 7. Introduction Let us first know what the project is about. Suppose you have a bicycle which lacks light in front and/or back. During the night time, you find that there is a lot of risk while riding the bicycle without any lights in it. And at this time of night, you’ll need a backlight or a front light to counter this difficulty to ride the bicycle safely. And a solution is the Use of Dynamo in your bicycle. The dynamo, by attaching it in between the two tires, converts the mechanical energy (which of course, is produced by paddling) into electrical energy, and by connecting the wires going out of the dynamo to light, it glows without any flaw. However, the difficulty expressed above can simply be solved by applying the battery instead of dynamo. But, you might face a lot more drawbacks in this case(as mentioned later). The battery could get low in charge while you’re riding your bicycle. It could even malfunction working(as happens in many cases). But, dynamo vanishes all the risks and even, though little, saves energy. One can also store this energy for sustainability.
  8. 8. Conversion from Mechanical Energy to Electric Energy using dynamo in bicycle: Renewable Source of Energy
  9. 9. Going through the Project 1.Rear tyre of Bicycle 2.Backlight (glows when tyre is rotated) 3.Bicycle Stand Connected with the Carriage to manage bicycle’s portability 4.Small tyre connected to dynamo 5.Carriage of the bicycle (connected to the stand to maintain the portability) Dynamo
  10. 10. Explanation to the Project. The bigger tyre is the rear- tyre of bicycle and is connected with a stand(portable). The stand is further connected to a see-saw tail of the bicycle. When the tail is pressed from the right-end, the smaller tyre gets in contact with the bigger one. And when the rider paddles the bicycle, both the tyres move and the light is emitted. In this way, the production of electrical energy takes place from the mechanical energy by rotation of the tyres.
  11. 11. Uses of Dynamo-in-Bicycle  To power bicycle lights w/o having to rely on batteries.  To avoid accidents during the night.  Safer to use.  One can store energy for future use(in case the system gets broken).  Unlike a few battery systems, the rider can use it whenever he wants.  Batteries run out and you won’t carry a set of batteries whenever you go out.  Unlike non- biodegradable batteries, it does not harm the environment.  Hub Dynamos are lighter and easier to use.  A dynamo and lights don't get stolen as easily as battery lights which are mostly designed for easy removal.  It was compulsory once in Germany to use the dynamo system in bicycle. However, it does face a couple of drawbacks. First of all, it is a little heavier than the batteries. Secondly, it slows you down a bit while riding.
  12. 12. References • http://www.gcsescience.com/pme21.htm • http://www.livestrong.com/article/ • http://exege.com/dynamos • http://en.wikipedia.org/wiki/Dynamo
  13. 13. CLASS XI A KENDRIYA VIDYALAYA JANAKPURI, NEW DELHI

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