initial commit / add all books

1 files changed, 31 insertions, 0 deletions

diff --git a/3681/CH11/EX11.10/Ex11_10.sce b/3681/CH11/EX11.10/Ex11_10.sce
new file mode 100644
index 000000000..47b50e1b3
--- /dev/null
+++ b/3681/CH11/EX11.10/Ex11_10.sce
@@ -0,0 +1,31 @@
+// Calculating the size of armature wire and the a.c. resistance of each pahase

+clc;

+disp('Example 11.10, Page No. = 11.34')

+// Given Data

+// 3 phase star connected synchronous generator

+p = 8;// Number of poles

+f = 50;// Frequency (in Hz)

+ys = 0.3;// Pole pitch (in meter)

+Iz = 100;// Line current (in Ampere)

+L = 0.3;// Gross axial length (in meter)

+Spp =3;// Slots per pole per phase

+Cs = 6;// Conductors per slot

+Kc_av = 1.3;// Average eddy current loss factor

+// Calculation of the suitable number of slots and conductors per slot

+D = ys*p/%pi;// Armature diameter (in meter)

+ns = 2*f/p;// Synchronous speed (in r.p.s.)

+Va = %pi*D*ns;// Peripheral speed (in meter per second)

+S = Spp*3*p;// Total number of slots

+Z = S*Cs;// Total number of conductors

+Tph = Z/6;// Turns per phase

+ac = Iz*Z/(%pi*D);// (in Ampere per meter)

+J = (43000/ac)+(Va/16);// Current density (in Ampere per mm square)

+as = 100/J;// Area of armature conductor

+disp(as,'(a) Area of armature conductor (mm square)=');

+L_active = 2*L;// Active length of each turn (in meter)

+Lmt = 2*L_active;// Since Total length of a turn is twice the active length (in meter)

+resistivity = 0.021;// Resistivity of copper at 75 degree celsius (in ohm per meter)

+r_dc = resistivity*Tph*Lmt/as;// D.C. resistance of each phase at 75 degree celsius (in ohm)

+r_ac = Kc_av*r_dc;// A.C. resistance of each phase

+disp(r_ac,'(b) A.C. resistance of each phase (ohm)=');

+//in book answers are 23.8 mm square and 0.099 ohm respectively.  The answers vary due to round off error