PRACTICAL MATLAB® FOR ENGINEERS PRACTICAL MATLAB

288 Practical MATLAB® Applications for Engineers

Example 3.13

Create the script fi le impedance_ plots that returns for the series RLC circuit shown in

Figure 3.69, over the range 100 ≤ ω ≤ 10,000 rad/s, the following plots:

1. |Z(ω)| versus ω


2. ∠Z(ω) versus ω


3. Repeat parts 1 and 2 for the case where the three elements (R, L, and C) are connected
   in parallel

R = 10 Ω

C = 12.5 μF

L = 5 mH

100 rad/s ≤ w ≤ 10,000 rad/s

FIGURE 3.69
Network of Example 3.13.

0.2

0.1

0

0 0.1

1

0

0.2 0.3 0.4 0.5

0.5

−0.5

− 1

Real

Voltage of the RC Circuit of Example 3.12

0.6 0.7 0.8 0.9 1

0 0.2 0.4 0.6 0.8 1

time in seconds

1.2 1.4 1.5 1.8

× 10 −^3

2

−0.1

−0.2

Amplitude in Volts

Imaginary

VS

VC

VR

vs(t)

vr(t)

vc(t)

Phasor Diagram (Example 3.12)

FIGURE 3.68
Plots of Example 3.12.