initial commit / add all books

1 files changed, 41 insertions, 0 deletions

diff --git a/3784/CH5/EX5.5/Ex5_5.sce b/3784/CH5/EX5.5/Ex5_5.sce
new file mode 100644
index 000000000..3644a3841
--- /dev/null
+++ b/3784/CH5/EX5.5/Ex5_5.sce
@@ -0,0 +1,41 @@
+clc

+//variable initialisation

+Pout=37.3 //Motor Output In KW

+Vm=440 //Motor Input in volt

+F=50 //supply frequency in Hz

+I0=20 //NO Load Line Current Of Motor

+R1=0.1 //resistance of stator in ohm

+R2=0.15 //resistance of rotor in ohm

+X1=0.4 //reactance of Motor in ohm

+X2=0.44 //reactance of Motor in ohm

+S=0.03 //Slip Of Motor

+Ls=1250 //Stator Core Loses In Watt

+Lr=1000 //Rotational Losses In KW

+Ns=1500 // Synchronous Speed Of Motor

+

+//Solution

+Vph=Vm/sqrt(3)

+I2=Vph/((R1+(R2/S))+%i*(X1+X2))

+I21=abs(I2)

+I21=49.1//rounding off to avoid computational error

+I0=1.78-(%i*19.9)//Taken in book for No load motor current

+I1=I0+I2

+y=imag(I1)

+x=real(I1)

+phi=atand(y/x)

+pf=cosd(phi)

+P2=3*((I21)^2)*(R2/S)

+Tg=(9.55*P2)/Ns

+Pm=(1-S)*P2

+Pout1=Pm+Lr

+Lcs=3*((I21)^2)*R1//Wrong value of I2 is taken in textbook

+Lcr=S*P2

+Lt=Ls+Lr+Lcs+Lcr

+Pin=Lt+Pout1

+n=Pout1/Pin

+printf('\n\n The input line Current=%0.1f Amp\n\n',I1)

+printf('\n\n The power factor=%0.1f lag\n\n',pf)

+printf('\n\n The Electromagnetic Torque Developed=%0.1f N-m\n\n',Tg)

+printf('\n\n The output=%0.1f Watts\n\n',Pm)

+printf('\n\n The efficiency of Motor=%0.1f\n\n',n)

+//The answers vary due to round off error