PRACTICAL MATLAB® FOR ENGINEERS PRACTICAL MATLAB

Alternating Current Analysis 301

C = 0.01 μF

V= 5^0 °

L = 30 mH

R 1 = 47 kΩ

R 2 = 270 Ω

Vc

I

IC

IL

FIGURE 3.80

Network of Example 3.19.

Example 3.19

Create the script fi le RLC_parallel_ analysis that returns the following plots of the circuit

shown in Figure 3.80, over the range 1000 Hz ≤ f ≤ 20,000 Hz in linear increments of

△f = 250 Hz:

1. Figure(1)
   a. |ZT(ω)| v e r s u s ω
   b. ∠ZT(ω) versus ω
   c. |YT(ω)| v e r s u s ω
   d. ∠YT(ω) versus ω


2. Figure(2)
   a. |I(ω)| v e r s u s ω
   b. ∠I(ω) versus ω
   c. |Vc(ω)| v e r s u s ω
   d. ∠Vc(ω) versus ω


3. Figure(3)
   a. |Ic(ω)| v e r s u s ω
   b. ∠Ic(ω) versus ω
   c. |IL(ω)| v e r s u s ω
   d. ∠IL(ω) versus ω
   where ZT is the impedance seen by the source.

MATLAB Solution

% Script file: RLC _ parallel _ analysis

deg = 180/pi;

V= 5;

R1 = 47e3;

R2 = 270;

C = 0.01e-6;

L = 30e-3;

f = [1000:250:20e3];

w = 2*pi.*f;

XC =1./(j*w.*C);