1 files changed, 48 insertions, 0 deletions
diff --git a/3574/CH11/EX11.1/EX11_1.sce b/3574/CH11/EX11.1/EX11_1.sce
new file mode 100644
index 000000000..ca732ced8
--- /dev/null
+++ b/3574/CH11/EX11.1/EX11_1.sce
@@ -0,0 +1,48 @@
+// Example 11.1
+// Computation of (a) The armature current when operating at rated conditions 
+// (b) The resistance and power rating of an external resistance required in 
+// series with the shunt field circuit to operate at 125 percent rated speed
+// Page No. 448
+
+clc;
+clear;
+close;
+
+// Given data
+HP=40;                  // hp rating of the device
+Perratedload=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
+
+// (a) The armature current when operating at rated conditions
+P=HP*746/Perratedload;
+IT=P/VT;                // Total current
+IF=VT/RF;               // Field current
+Ia=IT-IF;
+
+// (b) The resistance and power rating of an external resistance required in 
+// series with the shunt field circuit to operate at 125 percent rated speed
+
+Fnet=Nf*IF;                  // Corresponding mmf from magnetization curve
+Racir=Ra+RIP+Rs;
+n2=n1*1.25;                  // 125 percent rated speed
+// Shaft load is adjusted to  value that limits the armature current to 115% 
+// of rated current
+Bp2=Bp1*(n1/n2)*((VT-Ia*Racir*1.15)/(VT-Ia*Racir))
+FF=2.3*1000;
+IF1=FF/Nf;
+Rx=(VT/IF1)-RF;
+PRx=(IF1^2)*Rx;
+
+// Display result on command window
+printf("\n The armature current = %0.2f A ",Ia);
+printf("\n The resistance rating = %0.1f Ohm ",Rx);
+printf("\n The power rating = %0.1f W ",PRx);
+
+//Note: Answer varies due to round-off errors