1 files changed, 36 insertions, 0 deletions
diff --git a/3574/CH11/EX11.4/EX11_4.sce b/3574/CH11/EX11.4/EX11_4.sce
new file mode 100644
index 000000000..78507c3d7
--- /dev/null
+++ b/3574/CH11/EX11.4/EX11_4.sce
@@ -0,0 +1,36 @@
+// Example 11.4
+// Computation of resistance using linear approximation and values are 
+// compared with results obtained in example 11.1
+// Page No. 456
+clc;
+clear;
+close;
+
+// Given data
+HP=40;                   // hp rating of the device
+%ratedload=0.902;        // Percentage rated load
+VT=240;                  // Voltage value of motor
+RF=99.5;                 // Resistance of shunt motor
+Nf=1231;                 // Turns per pole of the shunt motor
+Ra=0.0680;               // Armature resistance
+RIP=0.0198;              // Interpole winding resistance
+Rs=0.00911;              // Resistance of series field winding
+Bp1=0.70;                // Flux density for a net mmf
+n1=1150;                 // Speed of shunt motor
+n2=1.25*n1;
+IT=137.84; 
+// Computation of resistance using linear approximation and values are 
+// compared with results obtained in example 11.1
+
+IF=VT/RF;                // Field current
+Ia1=IT-IF;               // Armature current
+Fnet1=Nf*IF;             // Net mmf
+Racir=Ra+RIP+Rs;         // Armature circuit resistance
+Fnet2=Fnet1*(n1/n2)*((VT-Ia1*Racir*1.15)/(VT-Ia1*Racir));
+IF1=Fnet2/Nf;           // Field current
+Rx=(VT/IF1)-RF;         // External resistance required
+
+
+// Display result on command window
+printf("\n The resistance rating of an external resistance = %0.2f Ohm ",Rx);
+