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| author | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
|---|---|---|
| committer | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
| commit | 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 (patch) | |
| tree | dbb9e3ddb5fc829e7c5c7e6be99b2c4ba356132c /3784/CH8/EX8.1/Ex8_1.sce | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
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initial commit / add all books
Diffstat (limited to '3784/CH8/EX8.1/Ex8_1.sce')
| -rw-r--r-- | 3784/CH8/EX8.1/Ex8_1.sce | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/3784/CH8/EX8.1/Ex8_1.sce b/3784/CH8/EX8.1/Ex8_1.sce new file mode 100644 index 000000000..b45c9526d --- /dev/null +++ b/3784/CH8/EX8.1/Ex8_1.sce @@ -0,0 +1,29 @@ +clc
+P=5e+6// power rating in Watts
+Vl=11e+3// line voltage in Volts
+f=50// frequency of motor in Hz
+p1=0
+N=6// no. of poles
+Rs=0// resistance of motor in ohm
+Xs=10// reactance of motor in ohm
+If=60// rated field current in amp
+
+//Solution
+Vph=Vl/sqrt(3)//phase voltage in Volts
+N1=750// speed of motor at rated motor current Is
+p2=36.869898//p2=acosd(0.8)
+Is=P/(sqrt(3)*Vl*cos(p1))
+E=Vph-(Is*Xs*%i)
+Ns=120*f/N// synchronous speed of motor
+f1=N1*f/Ns// freaquency of motor while running at N1
+Vph1=Vph*f1/(f)//phase voltage for speed N1 in V
+Xs1=(N1/Ns)*Xs//reactance of motor at speed N1 in ohm
+E2=Vph1-(Is*(cosd(p2)+%i*sind(p2))*(Xs1*%i))
+E1=E*N1/Ns//in V
+If1=abs(E2)*If/abs(E1)//field current at N1 in amp
+P1=3*Vph1*Is*cosd(p2)//output power in kW
+wm=N1*2*%pi/60//angular speed in rad/sec
+T=P1/wm//torque in Nm
+printf('\n\n The Field Current=%0.1f Amp\n\n',If1)
+printf('\n\n The Torque for Rated Armature Current=%0.1f N-m\n\n',T)
+//The answers vary due to round off error
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