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//calculating the speed of the motor
//Chapter 2
//Example 2.20
//page 125
clear;
clc;
disp("Example 2.20")
Il=5; //current in amperes al no-load
V=250; //voltage in volts
Rf=250; //field resistance in ohms
If1=V/Rf; //field current in amperes
Ia1=Il-If1; //armature current
Ra=0.2; //armature resistance in ohms
disp("at a load current of 50A")
Il2=50; //load current in amperes
//armature reaction weakens by 3percent
If2=0.97; //current in amperes
Ia2=Il2-If2;
N1=1000;
E1=(V-(Ia1*Ra));
E2=(V-(Ia2*Ra));
N2=(N1*E2)/(0.97*E1);
printf("N2=%frpm",N2)
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