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//Book name: Fundamentals of electrical drives by Mohamad A. El- Sharkawi
//chapter 5
//example 5.6
//edition 1
//publisher and place:Nelson Engineering
clc;
clear;
V=2300; //rated voltage of the synchronous motor in volt
Vt=V/3^(1/2);
f=60; //frequency in Hertz
p=6; //number of poles
Tl=5000; //constant torque of the load in Nm
Xs=6; //synchronous reactance of the motor in ohm
ns=(120*f)/p; //synchronous speed of the motor in rpm
omegas=(2*%pi*ns)/60;
Ef=(Tl*omegas*Xs)/(3*Vt); //The minimum excitation that machine must maintain to provide the needed torque
disp(Ef,'The minimum excitation that machine must maintain to provide the needed torque in volt is:')
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