The purpose of this lab was to find the most efficient circuit to deliver power to a load with an unknown length of AWG #30 cable. To find the optimal length of cable and load system we set up the lab equipment in a circuit as shown:
This is how the circuit looked when assembled.
Theoretically the load of the circuit would need to be 1000 ohms and receive a voltage of at least 11V.
However the actual resistance of the load was smaller.
According to the DMMs and calculations for length the maximum resistance the cable could sustain while maintaining 11V across the load was 83 ohms with a distance of 120.25m of AWG #30 cable.
The distribution efficiency was calculated as a function of the power out and power lost during the experiment. The values of the powers were calculated using the measurments from the DMMs in our setup. The distribution efficiency came out to be 92.1% and the calculated average time to discharge by the battery was 4.24 minutes.
Times to Discharge:
9.71s
9.69s
9.74s
9.72s
Conclusion:
A submarine with a power absorption of 0.1238W would be able to travel with up to 120.25m of AWG #30 cable provided that it would also be able to carry the weight of the cable in the water. With a 92.1% distribution efficiency, the submarine would also be able to operate for more than 4 minutes-- enough time to perform accurate maneuvers.
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