Lab Day 9

Non-Ideal Power Sources Lab

Though many theoretical models of electrical circuits assume that power supplies are ideal, actual circuit implementations can depend upon non-ideal limitations of the power supplies. In this lab, assignment we experimentally explored the behavior of non-ideal power sources. The experiments in this assignment illustrated some of the effects of non-ideal power supplies.

This is the pre-lab, we determined the expected values for the measured voltage out, source current, and power dissipated by the resistor for the cases when voltage source is ideal and non-ideal.

We then measured and recorded the actual value of the resistor for the circuit which is 22.3 ohms. We then used the waveform generator to apply the voltage 1V. We tuned the waveform generator voltage until we measure exactly 1V across the terminals. We then calculated the internal resistance of the voltage source as shown on the right side of the board.

Maximum Power Transfer Lab

This assignment involves the maximum power transfer theorem. We will inappropriately attempt to maximize the power delivered to a load resistor by, in some sense, re-defining the source circuit.

This is the pre-lab that we had to calculate the maximum power delivered to the load resistor.

This is a picture of the circuit.

We then calculate the maximum power with the measured value of the resistor and voltage.

Conclusion: The percent error was calculated as 0.70% from the expected value. This is because the value of the actual resistor was a little different.