Presentation of my activity in english.

1. From movement to electricity
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2. Overview of the experiment
Science Museum of
London
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3. Overview of the experiment
Science Museum of
London
Pedal to produce
electricity
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4. Overview of the experiment
Science Museum of
London
Pedal to produce
electricity
Try to power appliances
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5. Overview of the experiment
Science Museum of
London
Pedal to produce
electricity
Try to power appliances
What devices can you
power ?
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6. Overview of the experiment
Science Museum of
London
Pedal to produce
electricity
Try to power appliances
What devices can you
power ?
Presentation : final year
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7. What is an alternator ?
Rotating wheel
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8. What is an alternator ?
Rotating wheel
Light → Current
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9. What is an alternator ?
Rotating wheel
Light → Current
In a class
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10. What is an alternator ?
Rotating wheel
Light → Current
In a class
Bike on a tripod
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11. What is an alternator ?
Rotating wheel
Light → Current
In a class
Bike on a tripod
One alternator per group
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12. What is an alternator ?
Rotating wheel
Light → Current
In a class
Bike on a tripod
One alternator per group
Scoubidou, wire, iron
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13. What is an alternator ?
Rotating wheel
Light → Current
In a class
Bike on a tripod
One alternator per group
Scoubidou, wire, iron
Take appart → two parts
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14. What is an alternator ?
Rotating wheel
Light → Current
In a class
Bike on a tripod
One alternator per group
Scoubidou, wire, iron
Take appart → two parts
Stator : fixed
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15. What is an alternator ?
Rotating wheel
Light → Current
In a class
Bike on a tripod
One alternator per group
Scoubidou, wire, iron
Take appart → two parts
Stator : fixed
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16. What is an alternator ?
Rotating wheel
Light → Current
In a class
Bike on a tripod
One alternator per group
Scoubidou, wire, iron
Take appart → two parts
Stator : fixed
Rotor : mobile
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17. What is an alternator ?
Rotating wheel
Light → Current
In a class
Bike on a tripod
One alternator per group
Scoubidou, wire, iron
Take appart → two parts
Stator : fixed
Rotor : mobile
No rotation → no current
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18. What is an alternator ?
Rotating wheel
Light → Current
In a class
Bike on a tripod
One alternator per group
Scoubidou, wire, iron
Take appart → two parts
Stator : fixed
Rotor : mobile
No rotation → no current
Rotation essential
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19. The rotor
What is the rotor ?
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20. The rotor
What is the rotor ?
Bring close iron and rotor
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21. The rotor
What is the rotor ?
Bring close iron and rotor
→ Attracted
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22. The rotor
What is the rotor ?
Bring close iron and rotor
→ Attracted
Conclusion ?
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23. The rotor
What is the rotor ?
Bring close iron and rotor ω
→ Attracted
Conclusion ?
Rotor = rotating magnet
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24. The rotor
What is the rotor ?
Bring close iron and rotor ω
→ Attracted
Conclusion ?
Rotor = rotating magnet
Swap magnet with iron, assemble
alternator back, place it on wheel
and pedal
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25. The rotor
What is the rotor ?
Bring close iron and rotor ω
→ Attracted
Conclusion ?
Rotor = rotating magnet
Swap magnet with iron, assemble
alternator back, place it on wheel
and pedal
→ No current
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26. The rotor
What is the rotor ?
Bring close iron and rotor ω
→ Attracted
Conclusion ?
Rotor = rotating magnet
Swap magnet with iron, assemble
alternator back, place it on wheel
and pedal
→ No current
Conclusion ?
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27. The rotor
What is the rotor ?
Bring close iron and rotor ω
→ Attracted
Conclusion ?
Rotor = rotating magnet
Swap magnet with iron, assemble
alternator back, place it on wheel
and pedal
→ No current
Conclusion ?
Magnet essential
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28. The stator
What is the stator ?
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29. The stator
What is the stator ?
Disassemble alternator, replace
conductor with coils of polymers,
assemble it back, place it on wheel and
pedal
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30. The stator
What is the stator ?
Disassemble alternator, replace
conductor with coils of polymers,
assemble it back, place it on wheel and
pedal
→ No current
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31. The stator
What is the stator ?
Disassemble alternator, replace
conductor with coils of polymers,
assemble it back, place it on wheel and
pedal
→ No current
Conclusion ?
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32. The stator
What is the stator ?
Disassemble alternator, replace
conductor with coils of polymers,
assemble it back, place it on wheel and
pedal
→ No current
Conclusion ?
Conductor essential
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33. The stator
What is the stator ?
Disassemble alternator, replace
conductor with coils of polymers,
assemble it back, place it on wheel and
pedal
→ No current
Conclusion ?
Conductor essential
Instead of removing the coil, exchange
it with small wire of same conductor
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34. The stator
What is the stator ?
Disassemble alternator, replace
conductor with coils of polymers,
assemble it back, place it on wheel and
pedal
→ No current
Conclusion ?
Conductor essential
Instead of removing the coil, exchange
it with small wire of same conductor
→ No current
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35. The stator
What is the stator ?
Disassemble alternator, replace
conductor with coils of polymers,
assemble it back, place it on wheel and
pedal
→ No current
Conclusion ?
Conductor essential
Instead of removing the coil, exchange
it with small wire of same conductor
→ No current
Conclusion ?
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36. The stator
What is the stator ?
Disassemble alternator, replace
conductor with coils of polymers,
assemble it back, place it on wheel and
pedal
→ No current
Conclusion ?
Conductor essential
Instead of removing the coil, exchange
it with small wire of same conductor
→ No current
Conclusion ?
Coils essential
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37. Inductance
To have current in our alternator, we
need :
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38. Inductance
To have current in our alternator, we
need :
Moving magnet = Variable
magnetic field
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39. Inductance
To have current in our alternator, we
need :
Moving magnet = Variable
magnetic field
Coils of conductor
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40. Inductance
To have current in our alternator, we
need :
Moving magnet = Variable
magnetic field
Coils of conductor
Phenomenon = Inductance
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41. Inductance
To have current in our alternator, we
need :
Moving magnet = Variable
magnetic field
Coils of conductor
Phenomenon = Inductance
Operation of generator, electrical
motors, transformers... based on this
principle
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42. Inductance
To have current in our alternator, we
need :
Moving magnet = Variable
magnetic field
Coils of conductor
Phenomenon = Inductance
Operation of generator, electrical
motors, transformers... based on this
principle
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43. Inductance
To have current in our alternator, we
need :
Moving magnet = Variable
magnetic field
Coils of conductor
Phenomenon = Inductance
Operation of generator, electrical
motors, transformers... based on this
principle
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44. What can we power ?
Experiment in the London Museum = different from a simple bicycle alternator
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45. What can we power ?
Experiment in the London Museum = different from a simple bicycle alternator
→ difficult to model
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46. What can we power ?
Experiment in the London Museum = different from a simple bicycle alternator
→ difficult to model
Using values given by an association fond of the “Pedal Generator”, we can link power
generation and angular velocity
Power generated by the alternator as a function of the angular velocity
120
f(x) = 3.11x - 179.85
100
Power for 12 V(Watts)
12V (Watts)
80
60
40
20
0
50 55 60 65 70 75 80 85 90 95 100
Angular Velocity (RPM)
velocity
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47. What can we power ?
Experiment in the London Museum = different from a simple bicycle alternator
→ difficult to model
Using values given by an association fond of the “Pedal Generator”, we can link power
generation and angular velocity
→ linear fitting
Power generated by the alternator as a function of the angular velocity
120
f(x) = 3.11x - 179.85
100
Power for 12 V(Watts)
80
60
40
20
0
50 55 60 65 70 75 80 85 90 95 100
Angular Velocity (RPM)
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48. What can we power ?
Experiment in the London Museum = different from a simple bicycle alternator
→ difficult to model
Using values given by an association fond of the “Pedal Generator”, we can link power
generation and angular velocity
→ linear fitting
Power for 12V
Power generated by the alternator as a function of the angular velocity
120
f(x) = 3.11x - 179.85
100
Power for 12 V(Watts)
80
60
40
20
0
50 55 60 65 70 75 80 85 90 95 100
Angular Velocity (RPM)
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49. What can we power ?
We can convert 12V
DC to 230V AC and
use it to power our
devices
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50. What can we power ?
We can convert 12V
DC to 230V AC and
use it to power our
devices
Power usage of
different appliances
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51. What can we power ?
We can convert 12V
DC to 230V AC and
use it to power our
devices
Power usage of
different appliances
Casual cyclist could
use this system to
power his computer
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52. What can we power ?
We can convert 12V
DC to 230V AC and
use it to power our
devices
Power usage of
different appliances
Casual cyclist could
use this system to
power his computer
Problem : duration of
the task !
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53. Conclusion
Introduction to experimental method
Basic knowledge of the inductance
Learn to do a linear fit
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54. Conclusion
Introduction to experimental method
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55. Conclusion
Introduction to experimental method
Basic knowledge of the inductance
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56. Conclusion
Introduction to experimental method
Basic knowledge of the inductance
Learn to do a linear fit
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57. The end
Thank you for your attention
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