1 files changed, 21 insertions, 0 deletions
diff --git a/3760/CH4/EX4.32/Ex4_32.sce b/3760/CH4/EX4.32/Ex4_32.sce
new file mode 100644
index 000000000..8f3532ec8
--- /dev/null
+++ b/3760/CH4/EX4.32/Ex4_32.sce
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+clc;
+Vt=230;//Supply voltage
+P=4;//No of poles
+A=2;//No of parallel paths for armature conductors
+Z=500;//No of armature conductors
+Ra=0.2;//armature circuit resistance in ohm
+Rs=0.1;//field resistance in ohm
+Il=40;//line current
+N=1000;//rated speed in rpm
+Ia1=40;//armature current for dc series motor at 40 A line current
+Ia2=20;//armature current for dc series motor at 20 A line current
+//For 40A line current
+Ea1=Vt-Ia1*(Ra+Rs);//counter emf
+//For 20A line current
+Ea2=Vt-Ia2*(Ra+Rs);//counter emf
+//Let, phi_1=flux at 40 A, phi_2=flux at 20 A line current
+//phi_2=0.6*(phi_1)
+//(Ea1/Ea2)=(n1*phi_1)/(n2*phi_2)
+//(218/224)=(1000*(phi_1))/(n2*(0.6*(phi_1))
+n2=(1000*224)/(218*0.6);//speed of motor at line current of 20 A at 230 V
+printf('Speed of motor at line current of 20 A at 230 V is %f rpm.',round(n2));