From 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 Mon Sep 17 00:00:00 2001
From: prashantsinalkar
Date: Tue, 10 Oct 2017 12:27:19 +0530
Subject: initial commit / add all books

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 3681/CH11/EX11.14/Ex11_14.sce  |  44 +++++++++++++++++++++++++++++++++++++++++
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+// Calculating the flux per pole and length and width of pole and winding height and pole height
+clc;
+disp('Example 11.14, Page No. = 11.40')
+// Given Data
+// 3 phase star connected selient pole alternator
+Q = 2500;// kVA rating
+E = 2400;// Voltage rating (in kV)
+f = 60;// Frequency (in Hz)
+rpm = 225;// R.p.m.
+D = 2.5;// Stator bore (in meter)
+L = 0.44;// Core length (in meter)
+Nspp = 3;// Number of slot per pole per phase
+Ncs = 4;// Number of conductors per slot
+a = 2;// Circuits per phase
+Bp = 1.5;// Flux density in pole core (in Wb per meter square)
+df = 30;// Depth of winding (in mm)
+Sf = 0.84;// Field widind space factor
+Cl = 1.2;// Leakage factor
+Kw = 0.95;// Winding factor
+qf =1800;// Loss dissipated by field winding
+h_insulation = 30;// Height of insulation
+// Calculation of the flux per pole and length and width of pole and winding height and pole height
+ns = rpm/60;// Synchronous speed (in r.p.s.)
+p = 2*f/ns;// Number of poles
+S = 3*p*3.5;// Total number of slots
+Z = Ncs*S;// Total number of conductors
+Tph = int(Z/6);// Turns per phase
+Eph =E/3^(1/2);// Voltage per phase
+F_pole = Eph*a/(4.44*Tph*f*Kw);// Flux per pole (in Wb)
+disp(F_pole,'(a) Flux per pole (Wb) =');
+Fp = Cl*F_pole;// Flux in pole body (in Wb)
+Ap = Fp/Bp;// Area of pole body (in meter square)
+Lp = L;// Length of pole body = Length of armature core
+bp = Ap/Lp;// Width of pole body
+disp(Lp,'(b) Length of pole body (meter) =');
+disp(bp,'    Width of pole body (meter) =');
+Iph = Q*1000/(3^(1/2)*E);// Current in each phase
+Iz = Iph/a;// Current in each conductor
+ATa = 2.7*Iz*Tph*Kw/p;// Armature mmf per pole (in A)
+AT_fl = 2*ATa;// Field mmf at full load (in A)
+hf = AT_fl/(10^(4)*(Sf*df*10^(-3)*qf)^(1/2));// Height of field winding (in meter)
+disp(hf,'(c) Height of field winding (meter) =');
+disp(hf+h_insulation*10^(-3),'(d) Height of pole (meter) =');
+//in book answers are 0.049 Wb, 0.44 meter, 0.089 meter, 0.16 meter and 0.19 meter respectively.  The answers vary due to round off error
-- 
cgit