initial commit / add all books

8 files changed, 114 insertions, 0 deletions

diff --git a/2345/CH6/EX6.1/Ex6_1.sce b/2345/CH6/EX6.1/Ex6_1.sce
new file mode 100755
index 000000000..65697b159
--- /dev/null
+++ b/2345/CH6/EX6.1/Ex6_1.sce
@@ -0,0 +1,12 @@
+//Finding current

+//Example 6.1(pg 212)

+clc

+clear

+f=0.01//flux in Wb

+l=1//mean circumference in m

+N=1000//tunrs

+Ur=1000//relative permeability

+Uo=4*%pi*(10^-7)//permeability of free space in H/m

+a=0.001// cross section area in m^2

+I=(f*l)/(N*Uo*Ur*a)// current in Amp. since f=A*T/(l/Uo*Ur*a)

+printf('Thus Current required is %3.3f Amp',I)

diff --git a/2345/CH6/EX6.2/Ex6_2.sce b/2345/CH6/EX6.2/Ex6_2.sce
new file mode 100755
index 000000000..4ccc47a66
--- /dev/null
+++ b/2345/CH6/EX6.2/Ex6_2.sce
@@ -0,0 +1,12 @@
+//relative permeability

+//Example 6.2(pg 212)

+clc

+clear

+f=1.2*(10^-3)//flux in Wb

+l=1.4//mean circumference in m

+N=500//tunrs

+Uo=4*%pi*(10^-7)//permeability of free space in H/m

+a=0.0012// cross section area in m^2

+I=2//current in Amp

+Ur=(f*l)/(N*I*Uo*a)//relative permeability

+printf('Thus the relative permeability of iron is %3.2f ',Ur)

diff --git a/2345/CH6/EX6.3/Ex6_3.sce b/2345/CH6/EX6.3/Ex6_3.sce
new file mode 100755
index 000000000..b873a470d
--- /dev/null
+++ b/2345/CH6/EX6.3/Ex6_3.sce
@@ -0,0 +1,17 @@
+//Flux density, field intensity and permeability

+//Example 6.3(pg 213)

+clc

+clear

+l=0.4//mean circumference in m

+N=200//tunrs

+Uo=4*%pi*(10^-7)//permeability of free space in H/m

+a=5*(10^-4)// cross section area in m^2

+I=6.4//current in Amp

+f=0.8*(10^-3)//flux in Wb

+fd=f/a//flux density in Wb/m^2

+fi=I*N/l//Field intensity in AT/m

+Ur=(f*l)/(N*I*Uo*a)//relative permeability

+printf('(i) The Flux density is %3.2f Wb/m^2 \n',fd)

+printf('(ii) The Field intensity is %3.2f AT/m \n',fi)

+printf('(iii) The Relative permeability of steel is %3.2f ',Ur)

+//The answer to part(iii) has a calculation error in the textbook, hence it doesn't match the answer here.

diff --git a/2345/CH6/EX6.4/Ex6_4.sce b/2345/CH6/EX6.4/Ex6_4.sce
new file mode 100755
index 000000000..e5d5ddfe0
--- /dev/null
+++ b/2345/CH6/EX6.4/Ex6_4.sce
@@ -0,0 +1,10 @@
+//Finding loss

+//Example 6.4(pg 214)

+clc

+clear

+Hl=250//Hysteresis loss per m^3 in J/cycle

+V=1/150//Volume of specimen in m^3

+N=50//No of cycles/sec

+E=Hl*V*N//Energy loss per sec in J

+Eh=(E*3600)/1000//Energy loss per hour in kWh

+printf('Thus Energy loss per hour is %3.2f kWh',Eh)

diff --git a/2345/CH6/EX6.5/Ex6_5.sce b/2345/CH6/EX6.5/Ex6_5.sce
new file mode 100755
index 000000000..647dd2622
--- /dev/null
+++ b/2345/CH6/EX6.5/Ex6_5.sce
@@ -0,0 +1,14 @@
+//Finding loss and frequency

+//Example 6.5(pg 214)

+clc

+clear

+P=4//no of poles

+N=1600// Speed in rpm

+f=P*N/120//Frequency of magnetic reversal

+V=5400//volume

+d=7.5//density

+m=(V*d)/1000//Mass of armature in kg

+L=1.76//Loss in W/kg

+Cl=L*m//Core loss in Watts

+printf('Thus Frequency of magnetic reversal is %3.2f c/s',f)

+printf('\n and Core loss is %3.2f Watts',Cl)

diff --git a/2345/CH6/EX6.6/Ex6_6.sce b/2345/CH6/EX6.6/Ex6_6.sce
new file mode 100755
index 000000000..0173f3834
--- /dev/null
+++ b/2345/CH6/EX6.6/Ex6_6.sce
@@ -0,0 +1,16 @@
+//Finding core loss

+//Example 6.6(pg 214)

+clc

+clear

+v=76300//volume in c.c

+P=8// no of poles

+N=375//rpm

+f=P*N/120//freqency in c/s

+Bmax=12000//max. flux density in lines/cm^2

+n=0.002//(assumed)

+d=7.8//densityin gm/c.c

+l=1.7//loss in watts per kg

+Hl=n*v*f*(Bmax^1.6)*(10^-7)//Hysteresis loss in Watts

+Al=v*d*l/1000//Additional loss under particular running conditions

+Tl=Hl+Al//total core loss

+printf('Thus the total core loss is %4.0f Watts',Tl)

diff --git a/2345/CH6/EX6.7/Ex6_7.sce b/2345/CH6/EX6.7/Ex6_7.sce
new file mode 100755
index 000000000..902f661fc
--- /dev/null
+++ b/2345/CH6/EX6.7/Ex6_7.sce
@@ -0,0 +1,12 @@
+//Finding energy loss

+//Example 6.7(pg 215)

+clc

+clear

+m=12000//mass in gm

+d=7.5//density of iron in gm/c.c

+Hl=3000//Hysteresis loss per cc in ergs/cycle

+N=50//No of cycles per sec

+v=m/d//volume of specimen

+E=v*Hl*N//Energy loss per cc in ergs

+Eh=E/(10^10)//Energy loss per hour in kWh

+printf('Thus the Loss in energy is %3.3f kWh',Eh)

diff --git a/2345/CH6/EX6.8/Ex6_8.sce b/2345/CH6/EX6.8/Ex6_8.sce
new file mode 100755
index 000000000..8dba475cb
--- /dev/null
+++ b/2345/CH6/EX6.8/Ex6_8.sce
@@ -0,0 +1,21 @@
+//Finding losses

+//Example 6.8(pg 215)

+clc

+clear

+m=10//mass in kg

+T1=20//total loss in watts

+f1=50//frequency in c/s

+T2=35//total loss in watts

+f2=75//frequency in c/s

+//both have same peak flux density

+//total loss=hysteresis loss+ Eddy current loss

+//all quantities except frequency are constant

+//so Total loss=Af+Bf^2

+//let c1 and c2 be constants such that total loss=c1*f + c2*f^2

+c2=[T2-(T1*f2/f1)]/(f2^2-f1*f2)

+c1=(T1-c2*f1^2)/f1

+k=c1/c2//hysteresis loss/eddy current loss

+H50=T1*k/101//hysteresis loss at 50 c/s

+E50=T1-H50//eddy current loss at 50 c/s

+printf('Thus hysteresis loss at 50 c/s is %3.1f Watts \n',H50)

+printf('And Eddy current loss at 50c/s is %3.1f Watts',E50)