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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/CH7/EX7.9 | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
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initial commit / add all books
Diffstat (limited to '3784/CH7/EX7.9')
| -rw-r--r-- | 3784/CH7/EX7.9/Ex7_9.sce | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/3784/CH7/EX7.9/Ex7_9.sce b/3784/CH7/EX7.9/Ex7_9.sce new file mode 100644 index 000000000..3401c09a5 --- /dev/null +++ b/3784/CH7/EX7.9/Ex7_9.sce @@ -0,0 +1,33 @@ +clc
+//Variable Initialisation
+V=400//Supply Voltage in Volts
+f=50//Supply Frequency in Hz
+P=4//No of Poles
+N=1460//Rotor Speed in rpm
+d1=0.2//Duty Ratio
+s1=0.13//Given Slip
+d2=0.6//Duty Ratio
+s2=0.04//Given Slip
+s3=0.0867//Slip of motor
+Rs=0.08//Motor Resistance in ohm
+Xs=0.95//Motor Reactance in ohm
+Rr1=0.055//Motor Resistance in ohm
+X21=0.5//Motor Reactance in ohm
+Rd=0.0114//Resistance of link Inductor in ohm
+K=2//Stator to Rotor Turns Ratio
+//Solution
+V1=V/sqrt(3)
+Ns=120*f/P
+Ws=2*%pi*Ns/60
+Sm=Rr1/(sqrt((Rs^2)+((Xs+X21)^2)))//Slip at maximum Torque
+X2=X21*(K^2)
+R2=Rs*(K^2)
+Rr=Rr1*(K)//Wrongly Calculated in Textbook
+Radd=R2-Rr
+Rw=(Radd-Rd)/(1-d1)//The answers vary due to round off error
+Radd2=Rd+Rw*(1-d2)
+R22=Radd2+Rr
+Td=3*(V1^2)*R22/(s2*Ws*(((Rs+(R22/s2))^2)+((Xs+X2)^2)))
+printf('\n\n External Resistance=%0.1f ohm\n\n',Rw)
+printf('\n\n Torque at given condition=%0.1f N-m\n\n',Td)
+//The answers vary due to round off error
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