initial commit / add all books

4 files changed, 102 insertions, 0 deletions

diff --git a/3129/CH17/EX17.1/ex17_1.sce b/3129/CH17/EX17.1/ex17_1.sce
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+//Finding the Transistor voltage and current with clamping

+//Example 17.1(Page No-766) 

+clc

+clear

+//given data 

+Vcc=100;//in volts

+Rc=1.5;//in ohms

+Vd1=2.1;//in volts

+Vd2=0.9;//in volts

+Vbe=0.7;// in volts

+Vb=15;//in volts

+Rb=2.5;//in ohms

+B=16;

+

+//part(a)

+I1=(Vb-Vd1-Vbe)/Rb;

+Ic=B*I1;

+printf('(a)Collecter current without clamping:%2.2f A\n',Ic)

+

+//part(b)

+Vce=Vbe+Vd1-Vd2;

+printf(' (b)Clamping voltage:%.1f V\n',Vce)

+

+//part(c)

+IL=(Vcc-Vce)/Rc;

+Ic=B*(I1+IL)/(B+1);

+printf(' (c)Collector current with clampingIc:%2.2f A\n',Ic)

diff --git a/3129/CH17/EX17.2/ex17_2.sce b/3129/CH17/EX17.2/ex17_2.sce
new file mode 100755
index 000000000..98421e9c7
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+++ b/3129/CH17/EX17.2/ex17_2.sce
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+//Finding the Circuit values of a UJT Triggering ciruit

+//Example 17.2(Page No-774) 

+clc

+clear

+//given data 

+Vs=30;//in volts

+n=0.51;

+Ip=10*10^-6;//amperes

+Vv=3.5;//volts

+Iv=10*10^-3;//amps

+f=60;//Hz

+tg=50*10^-6;//in sec

+Vd=0.5;//volts

+T=1/f;//sec

+Vp=n*Vs+Vd;

+C=0.5*10^-6;//assume C 

+x=(Vs-Vp)/Ip;//upper limit of R

+x=x*10^-6;//in megaohms

+printf('upper limit of R:%2.2f kohms\n',x);

+y=(Vs-Vv)/Iv;//lower limit of R

+y=y*10^-3;//in kiloohms

+printf('lower limit of R:%2.2f Mohms\n',y);

+R=1/(f*C*log(1/(1-n)));

+R=R*10^-3;//in kohms

+printf('Value of R:%2.2f kohms\n',R);

+Vb1=Vp;//peak gate voltage

+Rb1=tg/C;

+printf('Rb1:%d Ohms\n',Rb1);

+Rb2=10^4/(n*Vs);

+printf('Rb2:%.2f Ohms\n',Rb2);

diff --git a/3129/CH17/EX17.3/ex17_3.sce b/3129/CH17/EX17.3/ex17_3.sce
new file mode 100755
index 000000000..59cb1e17e
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+++ b/3129/CH17/EX17.3/ex17_3.sce
@@ -0,0 +1,26 @@
+//Finding the Circuit values of a programmable UJT triggering circuit

+//Example 17.3(Page No-776) 

+clc

+clear

+//given data 

+Vs=30//V

+Ig=1*10^-3//A

+f=60//Hz

+tg=50*10^-6//sec

+Vrk=10//V

+T=1/f//time period

+Vp=Vrk//peak triggering voltage

+C=0.5*10^-6//F (assume)

+Rk=tg/C

+printf('value of Rk:%.2f ohm\n',Rk)

+n=Vp/Vs

+printf('intrinsic ratio n:%.2f\n',n)

+r=1/(f*C*log(Vs/(Vs-Vp)))

+R=r*10^-3

+printf('R:%.1f ohms\n',R)

+Rg=Vs*(1-n)*10^-3/Ig//in kilo-ohms

+printf('Rg:%d kohms\n',Rg)

+R1=Rg/n//in kiloohms

+R2=Rg/(1-n)//in kiloohms

+printf('R1:%d kohms\n',R1)

+printf('R2:%d kohms\n',R2)

diff --git a/3129/CH17/EX17.4/ex17_4.sce b/3129/CH17/EX17.4/ex17_4.sce
new file mode 100755
index 000000000..342a2707b
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+++ b/3129/CH17/EX17.4/ex17_4.sce
@@ -0,0 +1,19 @@
+//Finding the minimum width of a gate pulse for a thyristor converter

+//Example 17.4(Page No-777) 

+clc

+clear

+//given data

+Ih=500*10^-3//holding current in A

+td=1.5*10^-6//delay time in sec

+a=30*%pi/180//alpha is a delay angle in radians

+L=10*10^-3//load L in H

+R=10//load R in ohms

+V=120//supply voltage in V

+f=60//supply freq in Hz

+Vm=sqrt(2)*V//maximum voltage value in V

+wt=a

+V1=Vm*sin(wt)

+di=V1/L//di is rate of rise of anode current at instant of triggering

+t1=Ih/di//time req by current to reach to holding current value

+tg=(t1+td)*10^6//in microsec

+printf('minimum width of gate pulse tg:%.2f microsec\n',tg)