Electric Machinery Fundamentals Power & Energy 5 docx
Electric Machinery Fundamentals Power & Energy_3 docx
...
plot(amps,VR(1,:),'b-','LineWidth',2.0);
hold on;
plot(amps,VR(2,:),'k ','LineWidth',2.0);
plot(amps,VR(3,:),'r ','LineWidth',2.0);
title ('\bfVoltage ... Versus Load');
xlabel ('\bfLoad (A)');
ylabel ('\bfVoltage Regulation (%)');
legend('0. 85 PF lagging','1.0 PF','0....
Electric Machinery Fundamentals Power & Energy_5 docx
...
plot(t,vx,'b','Linewidth',1.0);
hold on;
plot(t,vy,'k ','Linewidth',1.0);
title('\bfReference Voltages for fr = 50 0 Hz');
xlabel('\bfTime (s)'); ...
plot(t,vb,'r:','Linewidth',2.0);
plot(t,vc,'k ','Linewidth',2.0);
title('\bfPhase Voltages');
xlabel('\bfTime (s)')...
Electric Machinery Fundamentals Power & Energy_2 potx
...
plot(amps,abs(VS(1,:)/1000),'b-','LineWidth',2.0);
hold on;
plot(amps,abs(VS(2,:)/1000),'k ','LineWidth',2.0);
plot(amps,abs(VS(3,:)/1000),'r ','LineWidth',2.0); ...
EQ,PSSP
Z
′′
=+
VV I
()()
15, 000 0 V 16,667 36.87 A 0.01 35 0. 056 3 15, 755 2.24 V
P
j=∠°+ ∠−° + Ω=∠°V
Therefore the voltage regulation of the transformer...
Electric Machinery Fundamentals Power & Energy_4 pptx
...
()
(
)
(
)
2
22
BO
0.00 05 A 150 0
ln 0.00 15 ln 5. 5 ms
30 V
H
IR
tRC
V
Ω
=− =− =
Therefore, the period of the relaxation oscillator is T = 178 ms + 5. 5 ms = 183 .5 ms, and the frequency of ... )
,pu
cos 1 0.47 65 cos41.6 0. 356
G
PVI
θ
== °=
()( )
,pu
sin 1 0.47 65 sin 41.6 0.316
G
QVI
θ
== °=
()( )
,pu
1 0.47 65 0.47 65
G
SVI== =
()( )
,pu base
0. 356 1000 kVA...
Electric Machinery Fundamentals Power & Energy_6 doc
...
plot(I,abs(VT_lag),'b-','LineWidth',2.0);
hold on;
plot(I,abs(VT_unity),'k ','LineWidth',2.0);
plot(I,abs(VT_lead),'r ','LineWidth',2.0);
title ('\bfTerminal ... Load');
xlabel ('\bfLoad (A)');
ylabel ('\bfTerminal Voltage (V)');
legend('0.8 PF lagging','1.0 PF','0.8 PF l...
Electric Machinery Fundamentals Power & Energy_8 ppt
...
plot(If,abs(Ia_nl),'k-','Linewidth',2.0);
hold on;
plot(If,abs(Ia_half),'b ','Linewidth',2.0);
plot(If,abs(Ia_full),'r:','Linewidth',2.0); ... Law,
,, ,,
()
Ag Am S g Sm A
jX X=+ +EE I
152
The resulting plot is shown below
350 400 450 50 0 55 0 600 650 700
200
210
220
230
240
250
260
E
A
(V)
I
A
(A)
Synchronous M...
Electric Machinery Fundamentals Power & Energy_9 doc
...
plot(nm,t_ind,'k-','LineWidth',2.0);
xlabel('\bf\itn_{m}');
ylabel('\bf\tau_{ind}');
title ('\bfInduction Motor Torque-Speed Characteristic'); ...
plot(nm,eff,'b-','LineWidth',2.0);
xlabel('\bf\itn_{m} \rm\bf(r/min)');
ylabel('\bf\eta (%)');
title ('\bfEfficiency versus Speed');
grid ....
Electric Machinery Fundamentals Power & Energy_11 ppt
... Equations (8 -55 ) and (8 -56 ).
230
figure(1);
plot(t_ind,n,'b-','LineWidth',2.0);
hold on;
xlabel('\bf\tau_{ind} (N-m)');
ylabel('\bf\itn_{m} \rm\bf(r/min)'); ...
plot(t_ind_noar,n_noar,'b-','LineWidth',2.0);
hold on;
plot(t_ind_ar,n_ar,'k ','LineWidth',2.0);
xlabel('\bf\tau_{ind} (N-m)');...
Electric Machinery Fundamentals Power & Energy_12 pptx
...
current');
axis ([0 5 0 150 ]);
set(gca,'YTick',[0 10 20 30 40 50 60 70 80 90 100 110 120 130 140
150 ]')
set(gca,'XTick',[0 0 .5 1.0 1 .5 2.0 2 .5 3.0 3 .5 4.0 4 .5 5.0]') ... (['Vt = ' num2str(Vt(ii)) ' V']);
disp (['If = ' num2str(i_f(ii)) ' A']);
% Plot the curves
figure(1);
plot(i_f,Ea,'b-...
Electric Machinery Fundamentals Power & Energy_13 pptx
...
current');
axis ([0 5 0 150 ]);
set(gca,'YTick',[0 10 20 30 40 50 60 70 80 90 100 110 120 130 140
150 ]')
set(gca,'XTick',[0 0 .5 1.0 1 .5 2.0 2 .5 3.0 3 .5 4.0 4 .5 5.0]') ...
disp (['Ea = ' num2str(Ea(ii)) ' V']);
disp (['Vt = ' num2str(Vt(ii)) ' V']);
disp (['If = ' num2str(i_f(ii)) '...
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