diff options
Diffstat (limited to '1319/CH8/EX8.3/8_3.sce')
-rw-r--r-- | 1319/CH8/EX8.3/8_3.sce | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/1319/CH8/EX8.3/8_3.sce b/1319/CH8/EX8.3/8_3.sce new file mode 100644 index 000000000..a50431a0d --- /dev/null +++ b/1319/CH8/EX8.3/8_3.sce @@ -0,0 +1,36 @@ +// To Calculate Parameters of a 3 phase 4 pole induction machine.
+
+clc;
+clear;
+
+V1=200;
+R2=0.1;
+X2=0.9;
+f=50;
+p=4;
+s=4/100;
+a=0.67; // The Ratio of rotor to stator turns
+
+P=((a*V1)^2)*R2*(1-s)*s/(((R2)^2)+((s*X2)^2)); // Power Delivered referred to the rotor side ( Mechanical Power)
+
+N=120*f/p;// Rated Speed
+
+N1=N*(1-s);// Speed at 4% slip
+
+T4=P*60/(2*%pi*N1); // Total Torque at 4% slip
+
+sm=floor((R2/X2)*1000)/1000; // Condition for Maximum Torque
+
+Pmax=((a*V1)^2)*R2*(1-sm)*sm/((R2^2)+((sm*X2)^2));// Power at maximum torque
+
+Nmax=ceil(N*(1-sm)); // Speed at Maximum Torque
+
+Tmax=Pmax*60/(2*%pi*Nmax); // Maixmum Torque
+
+// Please Note that the answers are accurate and no quantities are neglected as in the text book.
+printf('a) Total torque at 4 percent slip = %g Nm \n',T4)
+printf('b) Total Mechanical Power at 4 percent slip = %g watts or %g H.P \n',P,(P/735))
+printf('c) Maximum Torque = %g Nm \n',Tmax)
+printf('d) Speed at maximum torque = %g rpm \n',Nmax)
+printf('e) Maximum Mechanical Power = %g watt or %g H.P \n',Pmax,(Pmax/735))
+
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