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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 /3802/CH10/EX10.7/Ex10_7.sce | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
| download | Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.gz Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.bz2 Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.zip | |
initial commit / add all books
Diffstat (limited to '3802/CH10/EX10.7/Ex10_7.sce')
| -rw-r--r-- | 3802/CH10/EX10.7/Ex10_7.sce | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/3802/CH10/EX10.7/Ex10_7.sce b/3802/CH10/EX10.7/Ex10_7.sce new file mode 100644 index 000000000..43d348166 --- /dev/null +++ b/3802/CH10/EX10.7/Ex10_7.sce @@ -0,0 +1,54 @@ +//Book Name:Fundamentals of Electrical Engineering
+//Author:Rajendra Prasad
+//Publisher: PHI Learning Private Limited
+//Edition:Third ,2014
+
+//Ex10_7.sce
+
+clc;
+clear;
+Vl_not=400; //No load voltage in volt
+Vl_sc=50; //Blocked rotor voltage in volt
+I_not=20; //No load current in Ampere
+Isc=60; //Blocked rotor currnet in Ampere
+W1_not=5e3; //watt meter readings for no load test in watt
+W2_not=-3.2e3; //watt meter readings for no load test in watt
+Wsc1=2.3e3; //watt meter readings for blocked rotor test in watt
+Wsc2=0.75e3; //watt meter readings for blocked rotor test in watt
+Vdc=18; //dc voltage in volt
+Idc=60; //dc line current in Ampere
+
+printf("\n (a)")
+R1=(Vdc/Idc)/2;
+printf("\n R1=%1.2f ohm",R1)
+P_not=W1_not+W2_not;
+V_not=Vl_not/sqrt(3);
+cos_phi_not=P_not/(3*V_not*I_not);
+R_not=V_not/(I_not*cos_phi_not);
+printf("\n R0=%2.3f ohm",R_not)
+//R_not answer vary dueto round off error in v_not and cos_phi_not
+X_not=V_not/(I_not*sqrt(1-cos_phi_not^2));
+printf("\n X0=%2.3f ohm",X_not)
+Psc=Wsc1+Wsc2;
+Vsc=Vl_sc/sqrt(3);
+cos_phi_sc=Psc/(3*Vsc*Isc);
+R2_dash=((Vsc/Isc)*cos_phi_sc)-R1;
+printf("\n R2dash=%1.3f ohm",R2_dash)
+X1=((Vsc/Isc)*sqrt(1-cos_phi_sc^2))/2;
+printf("\n X1=%1.3f ohm",X1)
+X2_dash=X1;
+printf("\n X2dash=%1.3f ohm \n",X2_dash)
+
+printf("\n (b)")
+ns=25;
+s=R2_dash/X2_dash; //Slip for maximum torque
+pf_max=1/sqrt(2);
+Ps=(3*V_not^2)/sqrt((R1+R2_dash/s)^2+(2*X1)^2);
+Pc=(3*V_not^2*(R1+R2_dash))/((R1+R2_dash/s)^2+(2*X1)^2); //Stator copper loss in kw
+Pin=Ps-Pc;
+T=Pin/(2*%pi*ns);
+printf("\n Slip for pullout torque=%g",s)
+printf("\n Magnitude of pullout torque=%3.2f Nm",T)
+//There is a mistake in the book solution in part (b)
+//The calculated Ps value is wrong
+//Hence T answer vary
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