GENERATE ELECTRICAL ENERGY John Park, Chris Teng, Suzy Yassen, - - PowerPoint PPT Presentation

RAT WHEEL TO GENERATE ELECTRICAL ENERGY

John Park, Chris Teng, Suzy Yassen, Kristin Coleman

Background

• Faraday’s law
• Magnetic field change in

the surface induces electrical potential on the boundary of that surface

Figure. Integral and Differential form of Faraday’s law. Rate of change of magnetic flux through the circuit. E : Electromotive force, that force electron to move.

Magnetic Field

• Magnetic Field is

defined by the amount

• f magnetic flux that

comes out of North pole and goes into the south pole.

• The more the flux

arrow penetrate an area, the more magnetic force.

• Figure. Magnetic field.

Magnetic field change and electric flow

• Figure. Electric flow depending on Magnetic field change

How to set up the device

• Condition
• 1. The direction of coils winded should be

properly aligned in one direction (Right- hand rule)

• 2. The distance between the coil and the

magnet should be the closet as it could be

• 3. The size of the coil is optimal when it is

closest to the boundary of the magnetic field

Magnetic field Induces Current

Plan for the Rat Treadwheel

• 1. Magnets.

Are attached on one side

• f the treadwheel,

symmetrical location

• 2. Coils.

Are set up on the exact same symmetrical location as the magnets, oriented

• n the same direction, in
• rder to induce proper

electrical current.

• 3. Two ends of the coils are

connected to voltage meter in order to record the voltage.

How to set up the device

• Condition
• The direction of coils winded should be

properly aligned in one direction

• The distance between the coil and the magnet

should be the closet as it could be

• The size of the coil is optimal when it is

closest to the boundary of the magnetic field

Materials

• Copper wire
• Cardboard
• Super magnets
• Ceramic magnets
• Lab tape
• Voltmeter and leads
• Hamster/rat wheel and appropriately sized axel

Methods

• Due to rust on the wheel

stand, the wheel was removed and a cotton swab was used for the axel

• A Styrofoam plate was cut to

be the same size as the diameter of the wheel

• A total of 16 magnets were

used:

• 8 super magnets were placed on

the outward-facing side of the Styrofoam plate, alternating polarities

• 8 ceramic magnets were placed

directly opposite of the super magnets on the inward-facing side of the plate

Methods (cont.)

• 2 Coils:
• 2 copper coils were wrapped clockwise and attached to a piece of

cardboard

• The coils were also attached both to each other and the voltmeter
• The coils were placed near the magnets on the outside of the

wheel

• The wheel was spun at medium and fast speeds while the voltage

was recorded every 5 sec.

Methods (cont.)

• 4 Coils:
• 2 additional coils were

made and connected to each other and the previously made coils

• The wheel was spun

similarly to the way it was spun with just 2 copper coils, and the voltage was recorded every 5 seconds.

Results

• Initially 1-2 mV recorded
• Optimized device to get 9-10 mV
• Absolute max 13.1
• http://youtu.be/JFXumV2mMyY

Discussion

• Originally we wanted to use rats to spin the wheel, but

using humans provided more control and less variation.

• Came across a few problems regarding distance of the

coils and the magnets.

• Not the most efficient source of energy, but with more

modifications can be better.

• Interestingly, the amount and directions of the coils

mattered greatly.

Conclusions

• Given the task to “Harness a

biological process as a source of electrical energy” we were quite successful.

• Used the biological process of our

muscle contraction and movement.

• Used a variation of the Direct

Current (DC) or Dynamo Generator.

• Works by having the magnetic field

push electrons inside of the wire, generating a electrical current in the wire.