PRACTICAL MATLAB® FOR ENGINEERS PRACTICAL MATLAB

316 Practical MATLAB® Applications for Engineers

P.3.24 Create a program that returns the current I (through the inductor) shown in the
circuit diagram of Figure 3.97 by using
a. Superposition
b. Thevenin’s theorem
c. Norton’s theorem
d. Source transformation

P.3.25 For the unbalanced 3 Φ system shown in Figure 3.98, fi nd the currents I 1 , I 2 , and I 3
and the voltages VA, VB, and VC, where

ZA = 2 + j3

ZB = 4 − j6

ZC = 12 + j8

I

5

• j 3 Ω

4 Ω

7 30 ° V

2 Ω

j 5 Ω

0 °A

FIGURE 3.97
Network of P.3.24.

− +

− +

+−

100 0 ° RMS R

1 = 3 Ω

R 2 = 2 Ω

R 3 = 5 Ω

I 3

I 1

I 3

I 2

I 2

ZC

ZB

ZA

+

VC

• 
  

• VB

• 
  

+

VA

• I 1

100 120 ° RMS

100 − 120 °

FIGURE 3.98
Unbalanced 3 Φ network of P.3.25.