Title of Activity:
Project Progress.
ü Development of Windmill as Electricity Generator (The Coil part)
Objective:
- Construct the coil part for windmill.
- Measure the coil resistance.
Content/Procedure:
- Make a winding jig by folding a small piece of corrugated cardboard over itself 3 times. The jig should be 3 cm wide by about 20 cm long. Secure with electrical tape.
- Wind the wire onto your jig, as shown. Make 4 coils each with 200 turns of wire, making sure there is a wide gap between each coil, and leaving about 40 cm of wire before the first coil, and after the last coil. This should use up about 20 meters of wire per coil.
- Slide the coil off the jig and secure it tightly with pieces of electrical tape. Carefully sand or scrape off 15mm of the enamel insulation from the free ends of the wire.
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| Picture of Jig made from the cardboard |
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| Picture of the 1st coils |
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| Picture of the 2nd coils |
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| Picture of the 3rd coils |
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| Picture of the 4th coils |
Result and Analysis:
Materials that are used to make this coil part are:
- Enamelled copper wire (28 gage, 100m)
- Corrugated cardboard
- Electrical tape
Tools that are used to make this coil part are:
- Pliers
- Sandpaper
- Scissors
- Digital volt meter
Test the coils to ensure electricity can get through all of them: set the voltmeter for ohms (the 200 ohm range) and connect the test leads to the free ends of the coils. As a result, the value of resistance in that coil is 11.8Ω.
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| Measure the coil resistance value |
Conclusions:
As a conclusion, the coils part has a small resistance. This resistance value will affect the result, so it’s very important to construct suitable coils for this windmill.
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