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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