initial commit / add all books

10 files changed, 281 insertions, 0 deletions

diff --git a/2642/CH4/EX4.10/Ex4_10.sce b/2642/CH4/EX4.10/Ex4_10.sce
new file mode 100755
index 000000000..66839a973
--- /dev/null
+++ b/2642/CH4/EX4.10/Ex4_10.sce
@@ -0,0 +1,30 @@
+// FUNDAMENTALS OF ELECTICAL MACHINES 

+// M.A.SALAM 

+// NAROSA PUBLISHING HOUSE 

+// SECOND EDITION

+

+// Chapter 4 : DIRECT CURRENT GENERATORS

+// Example : 4.10

+

+clc;clear; // clears the console and command history 

+

+// Given data

+Pw = 12         // power in kW

+P = 4           // number of poles

+Z = 500         // number of conductors

+V_t = 250       // generator voltage in V

+N = 1000        // speed in rpm

+P_cu = 600      // full load copper loss in W

+brush_drop = 2  // brush drop in V

+

+// caclulations 

+A = 4                        // for lab wound A=P

+I_a = Pw*10^3/V_t            // armature current in A

+R_a = P_cu/I_a^2             // from copper loss equestion R_a in ohm

+E_g = V_t+I_a*R_a+brush_drop // generated voltage in V

+phi = E_g*60*A/(P*Z*N)       // flux per pole in Wb

+

+

+// display the result 

+disp("Example 4.10 solution");

+printf(" \n Flux per pole \n phi = %.3f Wb \n", phi );

diff --git a/2642/CH4/EX4.11/Ex4_11.sce b/2642/CH4/EX4.11/Ex4_11.sce
new file mode 100755
index 000000000..57707d495
--- /dev/null
+++ b/2642/CH4/EX4.11/Ex4_11.sce
@@ -0,0 +1,30 @@
+// FUNDAMENTALS OF ELECTICAL MACHINES 

+// M.A.SALAM 

+// NAROSA PUBLISHING HOUSE 

+// SECOND EDITION

+

+// Chapter 4 : DIRECT CURRENT GENERATORS

+// Example : 4.11

+

+clc;clear; // clears the console and command history 

+

+// Given data

+P = 4             // number of poles

+I_L = 25          // generator delivering current in A

+V_t = 230         // generator terminal voltage in V

+R_a = 0.2         // armature resistance in ohm

+R_sh = 55         // shunt field resistance in ohm

+brush_drop = 1    // brush drop in V

+

+// caclulations 

+I_sh = V_t/R_sh              // shunt field current in A

+I_a = I_L+I_sh               // armature current in A

+E_g = V_t+I_a*R_a+brush_drop // induced voltage in V

+P_arm = E_g*I_a              // power generated in armature in W

+P_L = V_t*I_L                // power absorbed by load in W

+n = (P_L/P_arm)*100          // efficiency

+

+// display the result 

+disp("Example 4.11 solution");

+printf(" \n Induced voltage \n E_g = %.1f V \n", E_g );

+printf(" \n Efficiency \n n = %.1f percent \n", n );

diff --git a/2642/CH4/EX4.2/Ex4_2.sce b/2642/CH4/EX4.2/Ex4_2.sce
new file mode 100755
index 000000000..3c395ae32
--- /dev/null
+++ b/2642/CH4/EX4.2/Ex4_2.sce
@@ -0,0 +1,23 @@
+// FUNDAMENTALS OF ELECTICAL MACHINES 

+// M.A.SALAM 

+// NAROSA PUBLISHING HOUSE 

+// SECOND EDITION

+

+// Chapter 4 : DIRECT CURRENT GENERATORS

+// Example : 4.2

+

+

+clc;clear; // clears the console and command history 

+

+// Given data

+l = 0.65 // length of conductor in m

+v = 35   // speed in m/s

+B = 0.8  // magnetic flux density in T

+

+// caclulations 

+e = B*l*v // induced voltage in V

+

+// display the result 

+disp("Example 4.2 solution");

+printf(" \n Induced voltage \n e = %.1f V \n", e);

+

diff --git a/2642/CH4/EX4.3/Ex4_3.sce b/2642/CH4/EX4.3/Ex4_3.sce
new file mode 100755
index 000000000..4aef86cf3
--- /dev/null
+++ b/2642/CH4/EX4.3/Ex4_3.sce
@@ -0,0 +1,24 @@
+// FUNDAMENTALS OF ELECTICAL MACHINES 

+// M.A.SALAM 

+// NAROSA PUBLISHING HOUSE 

+// SECOND EDITION

+

+// Chapter 4 : DIRECT CURRENT GENERATORS

+// Example : 4.3

+

+

+clc;clear; // clears the console and command history 

+

+// Given data

+l = 1.5    // length of conductor in m

+v = 20     // speed in m/s

+B = 0.9    // magnetic flux density in Wb/m^2

+teta = 35  // angle of rotation in degree

+

+// caclulations 

+e = B*l*v*sind(teta) // induced voltage in V

+

+// display the result 

+disp("Example 4.3 solution");

+printf(" \n Induced voltage \n e = %.1f V \n", e);

+

diff --git a/2642/CH4/EX4.4/Ex4_4.sce b/2642/CH4/EX4.4/Ex4_4.sce
new file mode 100755
index 000000000..e18553573
--- /dev/null
+++ b/2642/CH4/EX4.4/Ex4_4.sce
@@ -0,0 +1,25 @@
+// FUNDAMENTALS OF ELECTICAL MACHINES 

+// M.A.SALAM 

+// NAROSA PUBLISHING HOUSE 

+// SECOND EDITION

+

+// Chapter 4 : DIRECT CURRENT GENERATORS

+// Example : 4.4

+

+

+clc;clear; // clears the console and command history 

+

+// Given data

+P = 4       // number of poles

+Z = 40*10   // number of conductors

+phi = 0.02  // flux per pole in Wb

+N = 1200    // speed in rpm

+

+// caclulations 

+A = P/2

+E_g = (P*phi*Z*N)/(60*A) // generated voltage in V

+

+// display the result 

+disp("Example 4.4 solution");

+printf("\n Generated voltage \n E_g = %.0f V \n", E_g);

+

diff --git a/2642/CH4/EX4.5/Ex4_5.sce b/2642/CH4/EX4.5/Ex4_5.sce
new file mode 100755
index 000000000..7996df6df
--- /dev/null
+++ b/2642/CH4/EX4.5/Ex4_5.sce
@@ -0,0 +1,28 @@
+// FUNDAMENTALS OF ELECTICAL MACHINES 

+// M.A.SALAM 

+// NAROSA PUBLISHING HOUSE 

+// SECOND EDITION

+

+// Chapter 4 : DIRECT CURRENT GENERATORS

+// Example : 4.5

+

+

+clc;clear; // clears the console and command history 

+

+// Given data

+P = 6 // number of poles

+Z = 600 // number of conductors

+phi = 0.05 // flux per pole in Wb

+N = 1000 // speed in rpm

+I_a = 120 // generetor supply current in A

+

+// caclulations 

+A=6 // for lap-wound A=P

+E_g = (P*phi*Z*N)/(60*A) // generated voltage in V

+T_em = ((P*Z*phi)/(2*%pi*A))*I_a // electromagnetic torque in N-m

+

+

+// display the result 

+disp("Example 4.5 solution");

+printf(" \n Generated voltage \n E_g = %.0f V \n", E_g);

+printf(" \n Electromagnetic torque \n T_em = %.2f N-m \n", T_em);

diff --git a/2642/CH4/EX4.6/Ex4_6.sce b/2642/CH4/EX4.6/Ex4_6.sce
new file mode 100755
index 000000000..cf9abfb43
--- /dev/null
+++ b/2642/CH4/EX4.6/Ex4_6.sce
@@ -0,0 +1,27 @@
+// FUNDAMENTALS OF ELECTICAL MACHINES 

+// M.A.SALAM 

+// NAROSA PUBLISHING HOUSE 

+// SECOND EDITION

+

+// Chapter 4 : DIRECT CURRENT GENERATORS

+// Example : 4.6

+

+

+clc;clear; // clears the console and command history 

+

+// Given data

+V_t = 220    // shunt generator voltage in V

+I = 250      // shunt generator current in A

+R_sh = 50    // shunt field resistance in ohm

+R_a = 0.02   // armature resistance in ohm

+

+// caclulations 

+I_sh = V_t/R_sh   // shunt field current in A

+I_a = I+I_sh      // armature current in A

+E_g = V_t+I_a*R_a // generated voltage in V

+

+

+// display the result 

+disp("Example 4.6 solution");

+printf(" \n Generated voltage \n E_g = %.2f V \n", E_g);

+

diff --git a/2642/CH4/EX4.7/Ex4_7.sce b/2642/CH4/EX4.7/Ex4_7.sce
new file mode 100755
index 000000000..c63d5b623
--- /dev/null
+++ b/2642/CH4/EX4.7/Ex4_7.sce
@@ -0,0 +1,34 @@
+// FUNDAMENTALS OF ELECTICAL MACHINES 

+// M.A.SALAM 

+// NAROSA PUBLISHING HOUSE 

+// SECOND EDITION

+

+// Chapter 4 : DIRECT CURRENT GENERATORS

+// Example : 4.7

+

+

+clc;clear; // clears the console and command history 

+

+// Given data

+E = 25 // power of compound generator in kW

+V_t = 220 // terminal voltage in V

+R_se = 0.05    // series resistance in ohm

+R_sh = 55    // shunt field resistance in ohm

+R_a = 0.07   // armature resistance in ohm

+brush_drop = 1 // voltage drop per brush in V

+

+// caclulations 

+I_L = E*10^3/V_t // load current in A

+I_sh1 = V_t/R_sh // shunt field current in A

+I_a1 = I_sh1+I_L // armature current in A

+E_g1 = V_t+I_a1*(R_a+R_se)+2*brush_drop // generator voltage in V

+V_ab = V_t+I_L*R_se // voltage across the shunt field in V for short shunt generator

+I_sh2 = V_ab/R_sh // current in the shunt field in A for short shunt generator

+I_a2 = I_sh2+I_L // armature current in A for short shunt generator

+E_g2 = V_ab+I_a2*R_a+2*brush_drop // generator voltage in V for short shunt generator

+

+// display the result 

+disp("Example 4.7 solution");

+printf(" \n Generated emf when generatar is connected in long shunt \n E_g1 = %.f V \n", E_g1);

+printf(" \n Generated emf when generatar is connected in short shunt \n E_g2 = %.1f V \n", E_g2);

+

diff --git a/2642/CH4/EX4.8/Ex4_8.sce b/2642/CH4/EX4.8/Ex4_8.sce
new file mode 100755
index 000000000..21f6aef73
--- /dev/null
+++ b/2642/CH4/EX4.8/Ex4_8.sce
@@ -0,0 +1,33 @@
+// FUNDAMENTALS OF ELECTICAL MACHINES 

+// M.A.SALAM 

+// NAROSA PUBLISHING HOUSE 

+// SECOND EDITION

+

+// Chapter 4 : DIRECT CURRENT GENERATORS

+// Example : 4.8

+

+

+clc;clear; // clears the console and command history 

+

+// Given data

+V_t = 220   // shunt generator voltage in V

+I_L = 146   // generator delivering current in A

+R_sh = 50   // shunt field resistance in ohm

+R_a = 0.012 // armature resistance in ohm

+R_s = 0.02  // series field resistance in ohm

+R_d = 0.03  // diverter field resistance in ohm

+

+// caclulations 

+I_sh = V_t/R_sh             // shunt field current in A

+I_a = I_L+I_sh              // armature current in A

+R_com = R_s*R_d/(R_s+R_d)   // combined resistance in ohm

+E_g = V_t+(I_a*(R_a+R_com)) // generated voltage in V

+P_lsd = I_a^2*R_com         // power loss in series and diverter in W

+P_la = I_a^2*R_com         // power loss in the armature circuit resistance in W

+P_lsh =  V_t*I_sh          // power loss in shunt field resistance in W

+P_dl = I_L*V_t             // power delivered in W

+

+// display the result 

+disp("Example 4.8 solution");

+printf(" \n Generated voltage \n E_g = %.1f V \n", E_g);

+printf(" \n Power distribution \n P_dl = %.0f W \n", P_dl);

diff --git a/2642/CH4/EX4.9/Ex4_9.sce b/2642/CH4/EX4.9/Ex4_9.sce
new file mode 100755
index 000000000..4749e112d
--- /dev/null
+++ b/2642/CH4/EX4.9/Ex4_9.sce
@@ -0,0 +1,27 @@
+// FUNDAMENTALS OF ELECTICAL MACHINES 

+// M.A.SALAM 

+// NAROSA PUBLISHING HOUSE 

+// SECOND EDITION

+

+// Chapter 4 : DIRECT CURRENT GENERATORS

+// Example : 4.9

+

+clc;clear; // clears the console and command history 

+

+// Given data

+P = 4      // number of poles

+Z = 500    // number of conductors

+I_a = 30   // generetor supply current in A

+alpa = 6   // brushes displaced angle in degree

+

+// caclulations 

+A = P/2               // for wave connected A=P/2

+I_c = I_a/A           // current per conductor in A

+AT_d = Z*I_c*alpa/360 // demagnetizing ampere turns per pole in At

+AT_c = Z*I_c*((1/(2*P))-(alpa/360)) // cross magnetizing ampere turn per pole in At

+

+

+// display the result 

+disp("Example 4.9 solution");

+printf(" \n Demagnetizing ampere turns per pole \n AT_d = %.1f At \n", AT_d );

+printf(" \n Cross magnetizing ampere turn per pole \n AT_c = %.1f At \n", AT_c );