summaryrefslogtreecommitdiff
path: root/3681/CH15
diff options
context:
space:
mode:
Diffstat (limited to '3681/CH15')
-rw-r--r--3681/CH15/EX15.1/Ans15_1.PNGbin0 -> 4814 bytes
-rw-r--r--3681/CH15/EX15.1/Ex15_1.sce17
-rw-r--r--3681/CH15/EX15.4/Ans15_4.PNGbin0 -> 11907 bytes
-rw-r--r--3681/CH15/EX15.4/Ex15_4.sce26
4 files changed, 43 insertions, 0 deletions
diff --git a/3681/CH15/EX15.1/Ans15_1.PNG b/3681/CH15/EX15.1/Ans15_1.PNG
new file mode 100644
index 000000000..f0e12a844
--- /dev/null
+++ b/3681/CH15/EX15.1/Ans15_1.PNG
Binary files differ
diff --git a/3681/CH15/EX15.1/Ex15_1.sce b/3681/CH15/EX15.1/Ex15_1.sce
new file mode 100644
index 000000000..3bc44e275
--- /dev/null
+++ b/3681/CH15/EX15.1/Ex15_1.sce
@@ -0,0 +1,17 @@
+// Calculating the current in exciting coil
+clc;
+disp('Example 15.1, Page No. = 15.7')
+// Given Data
+F = 200;// Mass (in kg)
+lg = 5;// Distance (in mm)
+A = 5*10^(-3);// Area of pole face (in meter square)
+T = 3000;// Exciting coil turns
+u0 = 4*%pi*10^(-7);// Permeability of free space
+// Calculation of the current in exciting coil
+B = (F*u0/(0.051*A))^(1/2);// flux density in air gap (in Wb per meter square)
+mmf_air = 800000*B*lg*10^(-3);// Mmf required for air (in A)
+mmf_iron = 0.1*mmf_air;// Mmf required for iron parts (in A). Since mmf required for iron parts is 10% of air gap mmf
+AT = mmf_air+mmf_iron;// Total mmf
+I = AT/T;// Current in exciting coil (in Ampere)
+disp(I,'Current in exciting coil (Ampere) =');
+//in book answer is 1.456 Ampere. The answers vary due to round off error
diff --git a/3681/CH15/EX15.4/Ans15_4.PNG b/3681/CH15/EX15.4/Ans15_4.PNG
new file mode 100644
index 000000000..83e23e183
--- /dev/null
+++ b/3681/CH15/EX15.4/Ans15_4.PNG
Binary files differ
diff --git a/3681/CH15/EX15.4/Ex15_4.sce b/3681/CH15/EX15.4/Ex15_4.sce
new file mode 100644
index 000000000..9d6fbb645
--- /dev/null
+++ b/3681/CH15/EX15.4/Ex15_4.sce
@@ -0,0 +1,26 @@
+// Calculating the winding depth and winding space and space factor and the number of turns
+clc;
+disp('Example 15.4, Page No. = 15.9')
+// Given Data
+hf = 80;// in between flanges (in mm)
+Do = 75;// in flange diameter (in mm)
+Di = 30;// in gross diameter tube (in mm)
+a = 0.0357;// Area of copper wire
+d = 0.213;// Diameter of bare conductor (in mm)
+d1 = 0.213+2*0.05;// Diameter of insulated conductor (in mm)
+// Calculation of the winding depth and winding space and space factor and the number of turns
+df = (Do-Di)/2;// Winding depth (in mm)
+Aw = hf*10^(-3)*df*10^(-3);// Winding space
+disp(df,'(a) Winding depth =');
+disp(Aw,' Winding space =');
+disp('(b) for conductors when they bed')
+Sf = 0.9*(d/d1)^(2);// Space factor
+T = Sf*Aw/a*10^(6);// Number of turns
+disp(Sf,' Space factor =');
+disp(T,' Number of turns =');
+disp(' for conductors when they do not bed')
+Sf = 0.78*(d/d1)^(2);// Space factor
+T = Sf*Aw/a*10^(6);// Number of turns
+disp(Sf,' Space factor =');
+disp(T,' Number of turns =');
+//in book answers are 22.5 mm, 0.0018 mm square, 0.417, 21025, 0.361 and 18200. The answers vary due to round off error