Alternating Current Analysis
303
title(‘angle(VC) vs. w’,’FontSize’,9)
xlabel(‘frequency in w (rad/sec)’), ylabel(‘angle (degrees)’)
figure(3)
IC = VC./XC; IL = VC./ZS;
subplot(2,2,1)
plot(w,abs(IC))
grid on
set(gca,’fontsize’,9)
title(‘abs[IC(w)] vs. w’,’FontSize’,9)
ylabel(‘Current (amps)’)
subplot(2,2,2)
plot(w,angle(IC)*deg)
grid on
set(gca,’FontSize’,9)
title(‘angle[IC(w)] vs. w’,’FontSize’,9)
ylabel(‘angle (degrees)’)
subplot(2,2,3)
plot(w, abs(IL))
grid on
set(gca,’FontSize’,9)
title(‘abs(IL) vs. w’,’FontSize’,9)
xlabel(‘frequency w (rad/sec)’), ylabel(‘Current (amps)’)
subplot(2,2,4)
plot(w,angle(IL)*deg)
grid on
set(gca,’FontSize’,9)
title(‘angle(IL) vs. w’,’FontSize’,9)
xlabel(‘frequency in w (rad/sec)’), ylabel(‘angle (degrees)’)
The script fi le RLC_parallel_analysis is executed and the results are shown in Figures 3.81
through 3.83.
0
5
10
15
0
5
10
15
0
5
10
15
0
5
10
15
× 10 4
× 10 −5
× 10 4
× 10 4
angle[Z(w)] versus w
abs[Z(w)] versus w
abs(YT) versus w
angle(YT) versus w
Amplitude (Ohms)
Amplitude (Ohms −1
)
Angle (degrees)
−10
−5
0
5
10
Angle (degrees)
−10
−5
0
5
10
6
5.5
5
4.5
× 10 4
frequency w (rad/sec)
× 10 4
frequency w (rad/sec)
2.2
2.1
2
1.9
1.8
1.7
FIGURE 3.81
Plots of Example 3.19.
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