1 files changed, 30 insertions, 0 deletions
diff --git a/3784/CH1/EX1.15/Ex1_15.sce b/3784/CH1/EX1.15/Ex1_15.sce
new file mode 100644
index 000000000..472fbae4a
--- /dev/null
+++ b/3784/CH1/EX1.15/Ex1_15.sce
@@ -0,0 +1,30 @@
+clc
+// Variable Initialization 
+Vm=230//Supply Voltage in Volts
+Ra=0.2//Armature circuit resistance in Ohm
+I=80 //Rated current in Amp
+Nr=1200 //Motor speed in Rpm
+V=220//Rated voltage of motor in Volts
+a=150//firing angle in Degree
+Nr1=-700 //Speed in Rpm
+
+//Solution
+N=(Nr*2*%pi)/60 //Speed in Rad/sec
+Kaf=(V-I*Ra)/N //Motor Constant inN-m/A
+//(A)For rated motor torque
+Va=(2*Vm*1.414)*cosd(a)*(1/%pi)//Average voltage in Volts
+N1=(Nr1*2*%pi)/60 //Speed in Rad/sec
+af=acosd(((Kaf*N1)+(I*Ra))*%pi/(2*Vm*1.414))//Firing angle in Degree
+Eb1=V-(I*Ra)//Back emf in Volts
+Eb2=(Nr1/Nr)*Eb1 //Back emf in Volts
+Va1=Eb2+(I*Ra)//Armature voltage in volts
+af1=acosd((Va1*%pi)/(2*Vm*1.414))//Firing angle in Degree
+//(B) Half rated Torque
+Ia=(1/2)*I //Armature current in Amp
+W=(Va-(Ia*Ra))/Kaf //Angular speed in Rad/sec
+N=(W*60)/(2*%pi) //Speed in Rpm
+
+ //Results
+printf('\n\n The Firing Angle=%0.1f Degree\n\n',af1)
+printf('\n\n The motor Speed=%0.1f RPM \n\n',N)
+//The answers vary due to round off error(2nd only)