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AC Circuit

0 votes

asked Dec 15, 2015 in ELECTRICAL ENGINEERING by anonymous

1 Answer

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(1)

Step 1:

Millmans theorem:

Millman states that the voltage at the ends of the circuit is .

Where ,

is the resistance at the voltage sources and

is the resistance on the branch with no source or generators.

Find the Thevinins equivalent resistance of the circuit.

1.Open the load resistor.

2.Open Current Sources and Short Voltage Sources.

3.Calculate the Open Circuit Resistance. This is the Thevenin Resistance (RTH).

Redraw the circuit :

Step 2:

Observe the circuit:

can be written in complex form as

can be written in complex form as .

Three impedances are in parallel.

image.

Step 3:

Observe the circuit:

image can be written in complex form as image.

image can be written in complex form as image.

can be written in complex form as image.

Substitute corresponding values in the image.

image

image.

image can be written in polar form as image.

Solution:

image.

answered Dec 15, 2015 by Lucy Mentor
edited Dec 15, 2015 by Lucy

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