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clc,clear
printf('Example 6.2\n\n')
X_d=0.7 , X_q=0.4 //direct and quadrature axis synchronous reactance p.u.
R_a=0
phi=acos(0.8) //Lag
V_t=1 //assumed rated terminal Voltage
I_a=1 //Full-load armature current
psi=atan( (V_t*sin(phi)+I_a*X_q)/(V_t*cos(phi)+I_a*R_a) )
delta=psi-phi
I_d=I_a*sin(psi)
I_q=I_a*cos(psi)
E_f=V_t*cos(delta)+I_d*X_d+I_q*R_a
printf('Total e.m.f induced on open circuit is %.4f p.u.',E_f)
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