Question

Consider an extension cord plugged into wall outlet.

We plug in a small washing machine and dryer into this extension cord. Washing machine and its internal motor are shown below.

Dryer and its internal motor are shown below:

The simplified equivalent circuits of the motors are shown below:

Problem # 01: Numerical Work

Complete following numerical tasks.

1. Draw the complete circuit of this situation.

2. Find the phasor and sinusoidal expression for voltage across washing machine and dryer machine.

3. Find the phasor and sinusoidal expression for the current of washing machine.

4. Find the phasor and sinusoidal expression for the current of dryer.

5. Find the phasor and sinusoidal expression for the total current from the wall outlet.

6. Draw the input voltage wave form and current waveform in part 3, 4 and 5 on a single graph with

   respect to time. (Since voltage amplitude will be much greater than currents amplitude, so you

   can draw not-to-scale graphs)

7. Draw the phasors of the voltage and all three currents on the same graph. (Your figure can be not-

   to-scale but angles must be correct)

Problem # 02: Software Simulation Work

I’ve uploaded a partially complete Proteus circuit for Assignment 2 in the Assignment 2 folder.

Using proteus software, complete the following tasks.

1. Complete the provided Proteus circuit using data from Problem 1. Take a snapshot of the circuit to include it in the report.

2. Draw the waveforms of three currents in the same graph from t=0 to 1 sec and include it in your report.

3. Why do you think the current waveforms in part 2 behave weird from t=0 to around 0.5 sec?

4. Draw the waveforms of three currents in the same graph from t=1 sec to 1.1 sec and include

   it in your report.

5. Draw the waveforms of three currents in the same graph from t=1 sec to 1.1 sec along with

   the waveform of the source voltage. Set the limits of the y-axis from -10 to +10.

6. Prove that Proteus current waveforms in part 5 are same as current waveforms that you drew

   in the part 6 of Problem 1.

ENGR202-Summer2019 Assignment-2 Due Date: Thursday August 1, 2019 @11 pm Consider an extension cord plugged into wall outlet. 120 V, 60 Hz AC Supply We plug in a small washing machine and dryer into this extension cord. Washing machine and its internal motor are shown below. Dryer and its internal motor are shown below: