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+//Exa 4.4
+clc;clear;close;
+format('v',6);
+P=2;//MVA
+V=6000;//V
+speed=750;//rpm//speed
+ns=speed/60;//rps
+Zs=6;//ohm/phase
+f=50;//Hz
+pf=0.8;//Power factor Lagging
+//Calculation
+I=P*10^6/sqrt(3)/V;//A//Current
+theta=acosd(pf);//degree
+E=V/sqrt(3)+I*(cosd(theta)-%i*sind(theta))*%i*Zs;//V
+Ps=V*sqrt(3)*E/Zs/1000;//kw per elect. radian
+Ps=Ps*4*%pi/180;//kW per mech. degree
+Ps=abs(Ps);//kW per mech. degree
+disp(Ps,"Synchronising power per mech. degree(kW)");
+Ts=abs(Ps)*1000/2/%pi/ns;//N-m
+disp(Ts,"Synchronising torque(N-m)");
+//Answer in the textbook is not accurate.