1 files changed, 26 insertions, 0 deletions
diff --git a/3784/CH4/EX4.21/Ex4_21.sce b/3784/CH4/EX4.21/Ex4_21.sce
new file mode 100644
index 000000000..fe83bafda
--- /dev/null
+++ b/3784/CH4/EX4.21/Ex4_21.sce
@@ -0,0 +1,26 @@
+clc
+//Variable Initialisation
+Ea=220//Input Voltage of motor in volts
+Ia=150//Armature Current in Ampere
+Ra=0.06//Armature resistance in ohm
+N1=1000//Rated Speed of Motor in rpm
+N2=500//Rated Speed of Motor in rpm
+N4=1350//Rated Speed of Motor in rpm
+d3=0.91//Duty Ratio
+Ia2=2*Ia
+//Solution
+Eb1=Ea-(Ia*Ra)
+Eb2=(N2/N1)*Eb1
+E01=Eb2+(Ia*Ra)
+d1=E01/Ea
+E02=Eb2-(Ia*Ra)
+d2=E02/Ea
+E03=d3*Ea
+Eb3=E03+(Ia2*Ra)
+N3=(Eb3/Eb1)*N1
+Pin=E03*Ia2
+R=N1/N4 //Ratio of If1 and If2
+printf('\n\n Duty ratio for motoring operation=%0.1f\n\n',d1)
+printf('\n\n Duty ratio for braking operation=%0.1f\n\n',d2)
+printf('\n\n Maximum permissible motor Speed=%0.1f rpm\n\n',N3)
+printf('\n\n Ratio of If1 and If2=%0.1f\n\n',R)