Electric Machinery Fundamentals Power & Energy 11 ppt
Electric Machinery Fundamentals Power & Energy_4 pptx
... ripple factor
r = ripple(waveform);
% Print out the result
string = ['The ripple is ' num2str(r) '%.'];
disp(string);
When this program is executed, the results are ... in radians (=omega x time)
% Convert input to the range 0 <= wt < 2*pi
while wt >= 2*pi
wt = wt - 2*pi;
end
while wt < 0
wt = wt + 2*pi;
end
% Simulate the output of the .....
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); ... real power from or supplying
real power to the power system? Is it consuming reactive power from or supplying reactive power to
the power system?
(d) Calculate the real pow...
Electric Machinery Fundamentals Power & Energy_11 ppt
...
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)');
ylabel('\bf\itn_{m} ...
figure(1);
plot(t_ind,n,'b-','LineWidth',2.0);
xlabel('\bf\tau_{ind} (N-m)');
ylabel('\bf\itn_{m} \rm\bf(r/min)');
title ('\bfDiffere...
Electric Machinery Fundamentals Power & Energy_12 pptx
... (['Vt = ' num2str(Vt(ii)) ' V']);
disp (['If = ' num2str(i_f(ii)) ' A']);
% Plot the curves
figure(1);
plot(i_f,Ea,'b-','LineWidth',2.0); ...
figure(1);
plot(t_ind,n,'b-','LineWidth',2.0);
xlabel('\bf\tau_{ind} (N-m)');
ylabel('\bf\itn_{m} \rm\bf(r/min)');
title ('\bfCumulativel...
Electric Machinery Fundamentals Power & Energy_13 pptx
...
disp (['Ea = ' num2str(Ea(ii)) ' V']);
disp (['Vt = ' num2str(Vt(ii)) ' V']);
disp (['If = ' num2str(i_f(ii)) ' A']);
disp (['If_a ...
figure(1)
plot(nm,t_ind,'Color','b','LineWidth',2.0);
xlabel('\itn_{m} \rm(r/min)');
ylabel('\tau_{ind} \rm(N-m)');
title ('Single...
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); ...
title ('\bfSecondary Voltage Versus Load');
xlabel ('\bfLoad (A)');
ylabel ('\bfSecondary Voltage (kV)');
legend('0.8 PF laggi...
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 ...
plot(amps,abs(VSP(1,:)),'b-','LineWidth',2.0);
hold on;
plot(amps,abs(VSP(2,:)),'k ','LineWidth',2.0);
plot(amps,abs(VSP(3,:))...
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 = 500 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_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 ...
plot(Pload,PB,'k ','LineWidth',2.0);
plot(Pload,PC,'r ','LineWidth',2.0);
plot([0 10],[3 3],'k','LineWidt...
Electric Machinery Fundamentals Power & Energy_9 doc
... reactance is
()
22 2
111
TH
2
2
11
MMM
M
RX X X XX
X
RXX
++
=
++
.
If
1M
XR>> and
1M
XX>> then
22 2
111 MMM
XX R X X X>> + and
()
2
22
11
MM
XX X R+≈>>
, so
2
1
TH ...
plot(nm,t_ind,'k-','LineWidth',2.0);
xlabel('\bf\itn_{m}');
ylabel('\bf\tau_{ind}');
title ('\bfInduction Motor Torque-Speed Characteris...
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