initial commit / add all books

5 files changed, 174 insertions, 0 deletions

diff --git a/1892/CH2/EX2.1/Example2_1.sce b/1892/CH2/EX2.1/Example2_1.sce
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+++ b/1892/CH2/EX2.1/Example2_1.sce
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+// Example 2.1

+

+clear; clc; close;

+format('v',6);

+

+// Given data

+Is=220;//in Ampere

+//For no load

+Vo=220;//in volt

+Io=6;//in Ampere

+wo=350;//in watt

+

+//From locked rotor test

+Vsc=125;//in volt

+Isc=15;//in Ampere

+Wsc=580;//in watt

+R1=1.5*1.2;//in Ω

+

+//Calculations

+Zeq=Vsc/Isc;//in Ω

+Req=Wsc/Isc^2;//in Ω

+Xeq=sqrt(Zeq^2-Req^2);//in Ω

+R1=1.5*1.2;//1.5 times more

+R2=Req-R1;//in Ω

+//assume X1=X2; Xeq=X1+X2=2*X2

+X2=Xeq/2;//in Ω

+X1=X2;//in Ω

+r2=R2/2;//in Ω

+x2=X2/2;//in Ω

+

+cos_fio=wo/(Vo*Io);//unitless

+fi_o=acosd(cos_fio);//in degree

+Io=Io*expm(%i*-fi_o*%pi/180);//in Ampere(polar form)

+VAB=Vo-Io*[R1+r2/2+%i*(X1+X2/2)];//in volt

+Xo=abs(VAB)/abs(Io);//in ohm

+Xeq=2*Xo;//in ohm

+S=5/100;//slip

+Zf=Xo*expm(%i*%pi/2)*(r2/S+%i*X2/2)/(r2/S+%i*(X2/2+Xo));//in ohm

+Z1=R1+%i*X1;//in ohm

+Z2=6.4819+%i*3.416;//in ohm

+Zeq=Z1+Z2+Zf;//in ohm

+I1=Vo/Zeq;//in Ampere

+PF=cos(atan(imag(I1),real(I1)));//lagging Power factor

+disp(PF,"Power factor(lagging) : ");

+Vf=I1*Zf;//in volt

+I2f=Vf/(r2/S-%i*X2/2);//in Ampere

+Zb=Zf;//in ohm

+Vb=I1*Zb;//in Volt

+I2b=Vb/(r2/(2-S)+%i*X2);//in Ampere

+Pf=abs(I2f)^2*r2/S;//in watts

+Pb=abs(I2b)^2*r2/(2-S);//in watts

+Pm=(1-S)*(Pf-Pb);//in watts

+Wo=350;//in watts

+Pout=Pm-Wo;//in watts

+Pin=Vo*abs(I1)*PF;//in watts

+Eff=Pout/Pin*100;//in %

+disp(Eff,"Efficiency in % : ");

+//Answer in the book is wrong. Lots of mistake in the solution while calculating Zf. 

diff --git a/1892/CH2/EX2.2/Example2_2.sce b/1892/CH2/EX2.2/Example2_2.sce
new file mode 100755
index 000000000..bd2baedb5
--- /dev/null
+++ b/1892/CH2/EX2.2/Example2_2.sce
@@ -0,0 +1,40 @@
+// Example 2.2

+

+clear; clc; close;

+format('v',7);

+

+// Given data

+V1=110;//in volt

+Z1=2+%i*3;//in ohm

+Zeq_rotor=2+%i*3;//in ohm

+Xo=50;//in ohm(Magnetising impedence)

+Losses=25;//in watt(friction & voltage loss)

+S=5/100;//slip

+

+//Calculations

+R1=real(Z1);//in Ω

+X1=imag(Z1);//in Ω

+R2=real(Zeq_rotor);//in Ω

+X2=imag(Zeq_rotor);//in Ω

+r2=R2/2;//in Ω

+x2=X2/2;//in Ω

+xo=Xo/2;//in ohm

+Zf=%i*xo*(r2/S+%i*x2)/(r2/S+%i*(xo+x2));//in ohm

+Zb=%i*xo*(r2/(2-S)+%i*x2)/(r2/(2-S)+%i*(xo+x2));//in ohm

+Zeq=Z1+Zf+Zb;//in ohm

+I1=V1/Zeq;//in Ampere

+InputCurrent=abs(I1);//in Ampere

+disp(InputCurrent,"Input current in Ampere : ");

+PF=cos(atan(imag(I1),real(I1)));

+disp(PF,"Power factor(lagging) : ");

+Vf=I1*Zf;//in volt

+I2f=Vf/(r2/S+%i*x2);//in Ampere

+Vb=I1*Zb;//in Volt

+I2b=Vb/(r2/(2-S)+%i*x2);//in Ampere

+Pf=abs(I2f)^2*r2/S;//in watts

+Pb=13.88;//in watts

+Pm=(1-S)*(Pf-Pb);//in watts

+Pout=Pm-Losses;//in watts

+Pin=V1*abs(I1)*PF;//in watts

+Eff=Pout/Pin*100;//in %

+disp(Eff,"Efficiency in % : ");

diff --git a/1892/CH2/EX2.3/Example2_3.sce b/1892/CH2/EX2.3/Example2_3.sce
new file mode 100755
index 000000000..981cdca28
--- /dev/null
+++ b/1892/CH2/EX2.3/Example2_3.sce
@@ -0,0 +1,22 @@
+// Example 2.3

+

+clear; clc; close;

+format('v',7);

+

+// Given data

+Pout=250;//in watt

+V1=230;//in volt

+f=50;//in Hz

+Zm=4.5+%i*3.7;//in ohm

+Za=9.5+%i*3.5;//in ohm

+

+//Calculations

+//Za=9.5+%i*3.5-%i*Xc;//in ohm(Xc assumed to be connected in auxiliary winding)

+fi_a=90-atand(imag(Zm),real(Zm));//in degree

+Ra=real(Za);//in ohm

+Xa=imag(Za);//in ohm

+X=tand(fi_a)*Ra;//in ohm

+Xc=X+Xa;//in ohm

+C=1/2/%pi/f/Xc;//in Farad

+disp(C*10^6,"Value of capacitance in micro farad : ");

+//Note : In the book, instead of Capacitance which is asked, Torque is calculated even not asked in question and not given the sufficient data to calculate it.

diff --git a/1892/CH2/EX2.4/Example2_4.sce b/1892/CH2/EX2.4/Example2_4.sce
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index 000000000..201023afa
--- /dev/null
+++ b/1892/CH2/EX2.4/Example2_4.sce
@@ -0,0 +1,21 @@
+// Example 2.4

+

+clear; clc; close;

+format('v',7);

+

+// Given data

+f=50;//in Hz

+Z1m=3+%i*2.7;//in ohm

+Z1a=7+%i*3;//in ohm

+alfa=90;//in degree

+

+//Calculations

+//Z1a=7+%i*3-%i*Xc;//in ohm(Xc assumed to be connected in auxiliary winding)

+fi_a=90-atand(imag(Z1m),real(Z1m))

+R1a=real(Z1a);//in ohm

+X1a=imag(Z1a);//in ohm

+X=tand(fi_a)*R1a;//in ohm

+Xc=X+X1a;//in ohm

+C=1/2/%pi/f/Xc;//in Farad

+disp(C*10^6,"Value of capacitance in micro farad : ");

+//Note : In the book, Torque is calculated even not asked in question and not given the sufficient data to calculate it.

diff --git a/1892/CH2/EX2.5/Example2_5.sce b/1892/CH2/EX2.5/Example2_5.sce
new file mode 100755
index 000000000..bcdc3fe20
--- /dev/null
+++ b/1892/CH2/EX2.5/Example2_5.sce
@@ -0,0 +1,33 @@
+// Example 2.5

+

+clear; clc; close;

+format('v',7);

+

+// Given data

+V1=230;//in volt

+f=50;//in Hz

+Vm=100;//in volt

+Im=2;//in Ampere

+Wm=40;//in watts

+Va=80;//in volt

+Ia=1;//in Ampere

+Wa=50;//in watts

+

+//Calculations

+Z1em=Vm/Im;//in ohm

+R1em=Wm/Im^2;//in ohm

+X1em=sqrt(Z1em^2-R1em^2);//in ohm

+R1m=R1em/2;//in ohm

+X1m=X1em/2;//in ohm

+fi_m=atand(X1m/R1m);//in degree

+

+Z1ea=Va/Ia;//in ohm

+R1ea=Wa/Ia^2;//in ohm

+X1ea=sqrt(Z1ea^2-R1ea^2);//in ohm

+Ra=R1ea-R1m;//in ohm

+Xa=X1ea-X1m;//in ohm

+fi_a=90-fi_m;//in degree

+//after connecting capacitor

+Xc=Xa-tand(-fi_a)*Ra

+C=1/2/%pi/f/Xc;//in Farad

+disp(C*10^6,"Value of capacitance in micro farad : ");