blob: 1cc10a79a5df3460155dbe5cc7a9042af104a249 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
|
//Calculating the rotor loss and rotor speed
//Chapter 4
//Example 4.13
//page 309
clear;
clc;
disp("Example 4.13")
f=50;.....................//frequency of induction motor in hertz
hp=20; //horse power
ph=3; //Three phase supply
P=4; //number of poles
losses=500; //friction and vintage losses
printf("Output of the motor=%fW",(hp*735.5))
Pd=(hp*735.5)+losses; //power developed in watt
printf("\nPower developed by the rotor=%dW",Pd);
s=0.04; //slip
rotorloss=(s*Pd)/(1-s);
printf("\nRotor I^2R-loss=%fW",rotorloss);
Ns=(120*f)/P;
printf("\nNs=%drpm",Ns);
Nr=Ns*(1-s);
printf("Nr=%drpm",Nr);
|
